More memory optimizations

src/lib/epd.cpp

@@ -1,5 +1,8 @@
+#include "epd.hpp"
+
 int fgColor;
 int bgColor;
+uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
 
 int getBgColor()
 {
@@ -20,3 +23,83 @@ void setFgColor(int color)
 {
     fgColor = color;
 }
+
+void showSetupQr(const String &ssid, const String &password)
+{
+    char displayIndex = 6;
+
+    const String text = "WIFI:S:" + ssid + ";T:WPA;P:" + password + ";;";
+
+    uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
+    bool ok = qrcodegen_encodeText(text.c_str(), tempBuffer, qrcode, qrcodegen_Ecc_LOW,
+                                   qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
+
+    const int size = qrcodegen_getSize(qrcode);
+
+    const int padding = floor(float(displays[displayIndex].width() - (size * 4)) / 2);
+    const int paddingY = floor(float(displays[displayIndex].height() - (size * 4)) / 2);
+
+    displays[displayIndex].setPartialWindow(0, 0, displays[displayIndex].width(), displays[displayIndex].height());
+    displays[displayIndex].fillScreen(GxEPD_WHITE);
+    const int border = 0;
+
+    for (int y = -border; y < size * 4 + border; y++)
+    {
+        for (int x = -border; x < size * 4 + border; x++)
+        {
+            displays[displayIndex].drawPixel(padding + x, paddingY + y, qrcodegen_getModule(qrcode, floor(float(x) / 4), floor(float(y) / 4)) ? GxEPD_BLACK : GxEPD_WHITE);
+        }
+    }
+    displays[displayIndex].display(true);
+
+    displayIndex = 4;
+
+    displays[displayIndex].setPartialWindow(0, 0, displays[displayIndex].width(), displays[displayIndex].height());
+    displays[displayIndex].fillScreen(GxEPD_WHITE);
+    displays[displayIndex].setTextColor(GxEPD_BLACK);
+    displays[displayIndex].setCursor(0, 50);
+    displays[displayIndex].setFont(&FreeSansBold9pt7b);
+    displays[displayIndex].println(F("SSID:"));
+    displays[displayIndex].setFont(&FreeSans9pt7b);
+    displays[displayIndex].println(ssid);
+    displays[displayIndex].println("");
+    displays[displayIndex].setFont(&FreeSansBold9pt7b);
+    displays[displayIndex].println(F("Password:"));
+    displays[displayIndex].setFont(&FreeSans9pt7b);
+    displays[displayIndex].println(password);
+    displays[displayIndex].display(true);
+
+    displayIndex = 2;
+    displays[displayIndex].setPartialWindow(0, 0, displays[displayIndex].width(), displays[displayIndex].height());
+    displays[displayIndex].fillScreen(GxEPD_WHITE);
+    displays[displayIndex].setTextColor(GxEPD_BLACK);
+    displays[displayIndex].setCursor(0, 50);
+    displays[displayIndex].setFont(&FreeSans9pt7b);
+    displays[displayIndex].println(F("To setup\r\nscan QR or\r\nconnect\r\nmanually"));
+    // displays[displayIndex].println(F("scan QR or"));
+    // displays[displayIndex].println(F("connect"));
+    // displays[displayIndex].println(F("manually"));
+    displays[displayIndex].display(true);
+
+    displayIndex = 0;
+
+    displays[displayIndex].setPartialWindow(0, 0, displays[displayIndex].width(), displays[displayIndex].height());
+    displays[displayIndex].fillScreen(GxEPD_WHITE);
+    displays[displayIndex].setTextColor(GxEPD_BLACK);
+    displays[displayIndex].setCursor(0, 50);
+    displays[displayIndex].setFont(&FreeSansBold9pt7b);
+    displays[displayIndex].println(F("Welcome!"));
+    displays[displayIndex].display(true);
+
+    for (int i = 1; i < NUM_SCREENS; (i = i + 2))
+    {
+        displays[i].setPartialWindow(0, 0, displays[i].width(), displays[i].height());
+        displays[i].fillScreen(GxEPD_WHITE);
+        displays[i].display(true);
+    }
+
+    for (int i = 0; i < NUM_SCREENS; i++)
+    {
+        displays[i].hibernate();
+    }
+}

src/lib/epd.hpp

@@ -1,4 +1,20 @@
+#pragma once
+
+#include "config.h"
+#include "shared.hpp"
+#include "qrcodegen.h"
+
+#include <Fonts/FreeSansBold9pt7b.h>
+#include <Fonts/FreeSans9pt7b.h>
+#ifdef IS_BW
+#include <GxEPD2_BW.h>
+#else 
+#include <GxEPD2_3C.h>
+#endif
+
 int getBgColor();
 int getFgColor();
 void setBgColor(int color);
 void setFgColor(int color);
+
+void showSetupQr(const String& ssid, const String& password);

src/lib/functions.cpp

@@ -7,7 +7,7 @@ std::map<int, std::string> screenNameMap;
 
 #ifndef NO_MCP
 Adafruit_MCP23X17 mcp;
-const int MCP_INT_PIN = 8;
+const char MCP_INT_PIN = 8;
 
 #endif
 bool timerRunning = true;
@@ -27,7 +27,7 @@ Adafruit_NeoPixel pixels(NEOPIXEL_COUNT, NEOPIXEL_PIN, NEO_GRB + NEO_KHZ800);
 
 String softAP_SSID;
 String softAP_password;
-WiFiMulti wifiMulti;
+//WiFiMulti wifiMulti;
 
 WiFiManager wm;
 bool screenVisible[5];
@@ -36,20 +36,20 @@ void setupSoftAP()
 {
     byte mac[6];
     WiFi.macAddress(mac);
-    softAP_SSID = String("BTClock" + String(mac[5], 16) + String(mac[6], 16));
+    softAP_SSID = String("BTClock" + String(mac[5], 16) + String(mac[1], 16));
     WiFi.setHostname(softAP_SSID.c_str());
-    softAP_password = base64::encode(String(mac[2], 16) + String(mac[4], 16) + String(mac[5], 16) + String(mac[6], 16)).substring(2, 10);
+    softAP_password = base64::encode(String(mac[2], 16) + String(mac[4], 16) + String(mac[5], 16) + String(mac[1], 16)).substring(2, 10);
 }
 
 void setupComponents()
 {
     if (psramInit())
     {
-        Serial.println("\nPSRAM is correctly initialized");
+        Serial.println(F("PSRAM is correctly initialized"));
     }
     else
     {
-        Serial.println("PSRAM not available");
+        Serial.println(F("PSRAM not available"));
     }
 #ifdef WITH_RGB_LED
     pixels.begin();
@@ -61,12 +61,12 @@ void setupComponents()
 #endif
 
     // delay(3000);
-    // Serial.println("Leds should be on");
+    // Serial.println(F("Leds should be on"));
 
 #ifndef NO_MCP
     if (!mcp.begin_I2C())
     {
-        Serial.println("Error MCP23017");
+        Serial.println(F("Error MCP23017"));
         pixels.setPixelColor(0, pixels.Color(255, 0, 0));
         pixels.setPixelColor(1, pixels.Color(255, 0, 0));
         pixels.setPixelColor(2, pixels.Color(255, 0, 0));
@@ -77,7 +77,7 @@ void setupComponents()
     }
     else
     {
-        Serial.println("MCP23017 ok");
+        Serial.println(F("MCP23017 ok"));
         pixels.setPixelColor(0, pixels.Color(0, 255, 0));
         pixels.setPixelColor(1, pixels.Color(0, 255, 0));
         pixels.setPixelColor(2, pixels.Color(0, 255, 0));
@@ -107,7 +107,7 @@ void synchronizeTime()
     {
         configTime(preferences.getInt("gmtOffset", TIME_OFFSET_SECONDS), 0, NTP_SERVER);
         delay(500);
-        Serial.println("Retry set time");
+        Serial.println(F("Retry set time"));
     }
 
     rtc.setTimeStruct(timeinfo);
@@ -134,7 +134,7 @@ void setupWifi()
             pixels.setPixelColor(2, pixels.Color(255, 0, 0));
             pixels.setPixelColor(3, pixels.Color(0, 0, 255));
             pixels.show();
-            Serial.println("Erasing WiFi Config, restarting");
+            Serial.println(F("Erasing WiFi Config, restarting"));
             wm.resetSettings();
             ESP.restart();
         }
@@ -252,7 +252,7 @@ void toggleScreenTimer()
 
     if (!timerRunning)
     {
-        Serial.println("Stopping screen timer...");
+        Serial.println(F("Stopping screen timer..."));
         for (int i = NEOPIXEL_COUNT; i >= 0; i--)
         {
             for (int j = NEOPIXEL_COUNT; j >= 0; j--)
@@ -275,7 +275,7 @@ void toggleScreenTimer()
     }
     else
     {
-        Serial.println("Starting screen timer...");
+        Serial.println(F("Starting screen timer..."));
 
         pixels.setPixelColor(3, pixels.Color(0, 255, 0));
         pixels.setPixelColor(2, pixels.Color(0, 0, 0));
@@ -442,7 +442,7 @@ void setupI2C()
 
     if (slaveMode)
     {
-        Serial.println("I2C Slave Mode enabled");
+        Serial.println(F("I2C Slave Mode enabled"));
         Wire.onReceive(onI2CReceive);
         Wire.begin((uint8_t)I2C_DEV_ADDR);
     }
@@ -461,5 +461,5 @@ void onI2CReceive(int len)
 void onI2CRequest()
 {
     Wire.print("I2C Packets.");
-    Serial.println("onRequest");
+    Serial.println(F("onRequest"));
 }

src/lib/functions.hpp

@@ -2,7 +2,7 @@
 #include <WiFi.h>
 #include <Arduino.h>
 #include <WiFiManager.h>
-#include <WiFiMulti.h>
+//#include <WiFiMulti.h>
 
 #include "config.h"
 #include "shared.hpp"

src/lib/webserver.cpp

@@ -9,10 +9,7 @@ void setupWebserver()
     // Initialize SPIFFS
     if (!SPIFFS.begin(true))
     {
-        pinMode(47, OUTPUT);
+        Serial.println(F("An Error has occurred while mounting SPIFFS"));
-        digitalWrite(47, HIGH);
-
-        Serial.println("An Error has occurred while mounting SPIFFS");
         return;
     }
 
@@ -57,14 +54,14 @@ void setupWebserver()
     server.begin();
     if (!MDNS.begin(HOSTNAME))
     {
-        Serial.println("Error setting up MDNS responder!");
+        Serial.println(F("Error setting up MDNS responder!"));
         while (1)
         {
             delay(1000);
         }
     }
     MDNS.addService("http", "tcp", 80);
-    Serial.println("Webserver should be running");
+    Serial.println(F("Webserver should be running"));
 }
 
 /**
@@ -112,7 +109,7 @@ void onApiStatus(AsyncWebServerRequest *request)
 void onApiActionPause(AsyncWebServerRequest *request)
 {
     timerRunning = false;
-    Serial.println("Update timer paused");
+    Serial.println(F("Update timer paused"));
 
     request->send(200);
 };
@@ -137,7 +134,7 @@ void onApiActionTimerRestart(AsyncWebServerRequest *request)
 {
     // moment = millis();
     timerRunning = true;
-    Serial.println("Update timer restarted");
+    Serial.println(F("Update timer restarted"));
 
     request->send(200);
 }
@@ -221,7 +218,7 @@ bool processEpdColorSettings(AsyncWebServerRequest *request)
         AsyncWebParameter *fgColor = request->getParam("fgColor", true);
         preferences.putUInt("fgColor", strtol(fgColor->value().c_str(), NULL, 16));
         setFgColor(int(strtol(fgColor->value().c_str(), NULL, 16)));
-        Serial.print("Setting foreground color to ");
+        Serial.print(F("Setting foreground color to "));
         Serial.println(fgColor->value().c_str());
         settingsChanged = true;
     }
@@ -231,7 +228,7 @@ bool processEpdColorSettings(AsyncWebServerRequest *request)
 
         preferences.putUInt("bgColor", strtol(bgColor->value().c_str(), NULL, 16));
         setBgColor(int(strtol(bgColor->value().c_str(), NULL, 16)));
-        Serial.print("Setting background color to ");
+        Serial.print(F("Setting background color to "));
         Serial.println(bgColor->value().c_str());
         settingsChanged = true;
     }
@@ -250,7 +247,7 @@ void onApiEpdSettingsPost(AsyncWebServerRequest *request)
     {
         flashTemporaryLights(0, 255, 0);
 
-        Serial.println("Settings changed");
+        Serial.println(F("Settings changed"));
     }
 }
 
@@ -384,7 +381,7 @@ void onApiSettingsPost(AsyncWebServerRequest *request)
     {
         flashTemporaryLights(0, 255, 0);
 
-        Serial.println("Settings changed");
+        Serial.println(F("Settings changed"));
     }
 }
 
@@ -504,7 +501,7 @@ void onApiLightsFlash(AsyncWebServerRequest *request)
 void onApiLightsSetColor(AsyncWebServerRequest *request)
 {
     String rgbColor = request->pathArg(0);
-    int r, g, b;
+    uint r, g, b;
     sscanf(rgbColor.c_str(), "%02x%02x%02x", &r, &g, &b);
     setLights(r, g, b);
     request->send(200, "text/plain", rgbColor);

src/main.cpp

@@ -18,7 +18,7 @@
 #include "screens/blockheight.hpp"
 #include "screens/ticker.hpp"
 #include "screens/time.hpp"
-#include "screens/sats_per_dollar.hpp"
+//#include "screens/sats_per_dollar.hpp"
 #include "screens/halvingcountdown.hpp"
 
 #include "tasks/ha.hpp"
@@ -26,7 +26,7 @@
 #include "tasks/button.hpp"
 #include "tasks/led_handler.hpp"
 
-WiFiClient wifiClientInsecure;
+//WiFiClient wifiClientInsecure;
 WiFiClientSecure wifiClient;
 ESP32Time rtc(3600);
 
@@ -63,8 +63,9 @@ void setup()
 
     TimeScreen::init();
     BlockHeightScreen::init();
+    HalvingCountdownScreen::init();
     TickerScreen::init();
-    SatsPerDollarScreen::init();
+ //   SatsPerDollarScreen::init();
 
 #ifdef WITH_BUTTONS
     setupButtonTask();
@@ -79,7 +80,7 @@ void setup()
     registerNewBlockCallback(BlockHeightScreen::onNewBlock);
     registerNewBlockCallback(HalvingCountdownScreen::onNewBlock);
     registerNewPriceCallback(TickerScreen::onPriceUpdate);
-    registerNewPriceCallback(SatsPerDollarScreen::onPriceUpdate);
+//    registerNewPriceCallback(SatsPerDollarScreen::onPriceUpdate);
 
     setupDisplays();
   } else {

src/screens/blockheight.cpp

@@ -1,13 +1,23 @@
 #include "blockheight.hpp"
 
 uint BlockHeightScreen::blockNr = 0;
-std::array<String, NUM_SCREENS> BlockHeightScreen::epdContent = { "", "", "", "", "", "", "" };
+char **BlockHeightScreen::epdContent;
-
+const int maxStringLength = 15;
-//std::array<String, NUM_SCREENS> * BlockHeightScreen::epdContent = (std::array<String, NUM_SCREENS> * ) ps_malloc(7 * sizeof (std::array<String, NUM_SCREENS>));
+char*  BlockHeightScreen::psramBuffer;
-
 
 void BlockHeightScreen::init()
 {
+   BlockHeightScreen::psramBuffer = (char*)ps_malloc(NUM_SCREENS * maxStringLength);
+
+    if (BlockHeightScreen::psramBuffer == nullptr)
+    {
+        Serial.println(F("Failed to allocate memory in PSRAM"));
+    }
+    BlockHeightScreen::epdContent = new char*[NUM_SCREENS];
+    for (int i = 0; i < NUM_SCREENS; i++)
+    {
+        epdContent[i] = psramBuffer + i * maxStringLength;
+    }
     BlockHeightScreen::blockNr = preferences.getUInt("blockHeight", 789000);
     setupBlockNotify();
     BlockHeightScreen::showScreen();
@@ -17,10 +27,14 @@ void BlockHeightScreen::showScreen()
 {
     std::string blockNrString = String(BlockHeightScreen::blockNr).c_str();
     blockNrString.insert(blockNrString.begin(), NUM_SCREENS - blockNrString.length(), ' ');
-    epdContent[0] = "BLOCK/HEIGHT";
+    //    epdContent[0] = "BLOCK/HEIGHT";
+    snprintf(BlockHeightScreen::epdContent[0], 13, "BLOCK/HEIGHT", 0);
+
     for (uint i = 1; i < NUM_SCREENS; i++)
     {
-        BlockHeightScreen::epdContent[i] = blockNrString[i];
+        snprintf(BlockHeightScreen::epdContent[i], 2, &blockNrString[i], 0);
+
+        //        BlockHeightScreen::epdContent[i] = blockNrString[i];
     }
 }
 
@@ -31,6 +45,16 @@ void BlockHeightScreen::onNewBlock(uint blockNr)
     BlockHeightScreen::showScreen();
 }
 
-std::array<String, 7> BlockHeightScreen::getEpdContent() {
+std::array<String, NUM_SCREENS> BlockHeightScreen::getEpdContent()
-    return BlockHeightScreen::epdContent;
+{
+    std::array<String, NUM_SCREENS> ret;
+
+    for (int i = 0; i < NUM_SCREENS; i++)
+    {
+        ret[i] = BlockHeightScreen::epdContent[i];
+    }
+
+    //    std::copy(std::begin(BlockHeightScreen::epdContent), std::end(BlockHeightScreen::epdContent), std::begin(ret));
+
+    return ret;
 }

src/screens/blockheight.hpp

@@ -6,11 +6,13 @@
 #include "tasks/epd.hpp"
 #include "tasks/blocknotify.hpp"
 
-class BlockHeightScreen {
+class BlockHeightScreen
-    protected:
+{
+protected:
     static uint blockNr;
-        static std::array<String, NUM_SCREENS> epdContent;
+    static char** epdContent;
-    public:
+    static char* psramBuffer;
+public:
     static void init();
     static void showScreen();
     static void onNewBlock(uint blockNr);

src/screens/countdown.cpp

@@ -38,6 +38,6 @@ void CountdownScreen::countdownTask(void *pvParameters)
         }
         vTaskDelay(pdMS_TO_TICKS(1000));
     }
-    Serial.println("Countdown finished!");
+    Serial.println(F("Countdown finished!"));
     vTaskDelete(NULL);
 }

src/screens/halvingcountdown.cpp

@@ -3,33 +3,63 @@
 uint HalvingCountdownScreen::currentBlockNr = 0;
 uint HalvingCountdownScreen::halvingBlockNr = 0;
 
-std::array<String, NUM_SCREENS> HalvingCountdownScreen::epdContent = {"", "", "", "", "", "", ""};
+char **HalvingCountdownScreen::epdContentP;
+const int maxStringLength = 12;
+char *HalvingCountdownScreen::psramBuffer;
+
+//char HalvingCountdownScreen::epdContent[NUM_SCREENS][maxStringLength];
+bool initialized = false;
 
 void HalvingCountdownScreen::init()
 {
     HalvingCountdownScreen::currentBlockNr = preferences.getUInt("blockHeight", 789000);
 
+    HalvingCountdownScreen::psramBuffer = (char *)ps_malloc(NUM_SCREENS * maxStringLength);
+
+    if (HalvingCountdownScreen::psramBuffer == nullptr)
+    {
+        Serial.println(F("Failed to allocate memory in PSRAM (HalvingCountdownScreen)"));
+    }
+    HalvingCountdownScreen::epdContentP = new char*[NUM_SCREENS];
+
+    for (int i = 0; i < NUM_SCREENS; i++)
+    {
+        epdContentP[i] = HalvingCountdownScreen::psramBuffer + i * maxStringLength;
+      //  strcpy(epdContent[i], "x");
+        strcpy(epdContentP[i], "x");
+    }
+    initialized = true;
     setupBlockNotify();
     HalvingCountdownScreen::showScreen();
 }
 
 void HalvingCountdownScreen::showScreen()
 {
+    if (!initialized)
+        return;
+
     uint minutesToHalving = HalvingCountdownScreen::getNextHalvingBlockNr() * 10;
 
-    int years = floor(minutesToHalving / 525600);
+    const int years = floor(minutesToHalving / 525600);
-    int days = floor((minutesToHalving - (years * 525600)) / (24*60));
+    const int days = floor((minutesToHalving - (years * 525600)) / (24 * 60));
-    int hours = floor((minutesToHalving - (years * 525600) - (days * (24*60))) / 60);
+    const int hours = floor((minutesToHalving - (years * 525600) - (days * (24 * 60))) / 60);
-    int mins = floor(minutesToHalving - (years * 525600) - (days * (24*60)) - (hours * 60));
+    const int mins = floor(minutesToHalving - (years * 525600) - (days * (24 * 60)) - (hours * 60));
-//    int secs = floor((minutesToHalving - (years * 525600) - (days * (24*60)) - (hours * 60) - mins) * 60);
+    //    int secs = floor((minutesToHalving - (years * 525600) - (days * (24*60)) - (hours * 60) - mins) * 60);
 
-    epdContent[0] = F("BIT/COIN");
+    snprintf(HalvingCountdownScreen::epdContentP[0], maxStringLength, "BIT/COIN");
-    epdContent[1] = F("HALV/ING");
+    snprintf(HalvingCountdownScreen::epdContentP[1], maxStringLength, "HALV/ING");
-    epdContent[2] = String(years) + "/YRS";
+    snprintf(HalvingCountdownScreen::epdContentP[2], maxStringLength, "%d/YRS", years);
-    epdContent[3] = String(days) + "/DAYS";
+
-    epdContent[4] = String(hours) + "/HRS";
+    snprintf(HalvingCountdownScreen::epdContentP[3], maxStringLength, "%d/DAYS", days);
-    epdContent[5] = String(mins) + "/MINS";
+    snprintf(HalvingCountdownScreen::epdContentP[4], maxStringLength, "%d/HRS", hours);
-    epdContent[6] = F("TO/GO");
+    snprintf(HalvingCountdownScreen::epdContentP[5], maxStringLength, "%d/MINS", mins);
+    snprintf(HalvingCountdownScreen::epdContentP[6], maxStringLength, "TO/GO");
+
+    //     // strcpy(epdContent[2], sprintf(String(years) + "/YRS").c_str());
+    //    // snprintf(epdContent[2], sizeof(epdContent[2]), "%d/YRS", years);
+    //     //  strcpy(epdContent[3], String(days) + "/DAYS");
+    //     //    strcpy(epdContent[4], String(hours) + "/HRS");
+    //     //  strcpy(epdContent[5], String(mins) + "/MINS");
 }
 
 uint HalvingCountdownScreen::getNextHalvingBlockNr()
@@ -46,5 +76,14 @@ void HalvingCountdownScreen::onNewBlock(uint blockNr)
 
 std::array<String, NUM_SCREENS> HalvingCountdownScreen::getEpdContent()
 {
-    return HalvingCountdownScreen::epdContent;
+    std::array<String, NUM_SCREENS> ret;
+
+    if (!initialized) return ret;
+
+    for (int i = 0; i < NUM_SCREENS; i++)
+    {
+        ret[i] = HalvingCountdownScreen::epdContentP[i];
+    }
+
+    return ret;
 }

src/screens/halvingcountdown.hpp

@@ -6,12 +6,18 @@
 #include "tasks/epd.hpp"
 #include "tasks/blocknotify.hpp"
 
-class HalvingCountdownScreen {
+class HalvingCountdownScreen
-    protected:
+{
+protected:
     static uint currentBlockNr;
     static uint halvingBlockNr;
-        static std::array<String, NUM_SCREENS> epdContent;
+    //static std::array<char*, NUM_SCREENS> epdContent;
-    public:
+   // static char epdContent[NUM_SCREENS][12];
+    static char** epdContentP;
+//    static char **epdContent;
+    static char *psramBuffer;
+
+public:
     static void init();
     static void showScreen();
     static void onNewBlock(uint blockNr);

src/screens/sats_per_dollar.cpp

@@ -1,30 +1,30 @@
-#include "sats_per_dollar.hpp"
+// #include "sats_per_dollar.hpp"
 
-uint SatsPerDollarScreen::satsPerDollar = 0;
+// uint SatsPerDollarScreen::satsPerDollar = 0;
-std::array<String, NUM_SCREENS> SatsPerDollarScreen::epdContent = { "", "", "", "", "", "", "" };
+// std::array<String, NUM_SCREENS> SatsPerDollarScreen::epdContent = { "", "", "", "", "", "", "" };
 
-void SatsPerDollarScreen::init() {
+// void SatsPerDollarScreen::init() {
-    SatsPerDollarScreen::satsPerDollar = int(round(1 / preferences.getFloat("btcPrice", 12345) * 10e7));
+//     SatsPerDollarScreen::satsPerDollar = int(round(1 / preferences.getFloat("btcPrice", 12345) * 10e7));
-    setupGetPriceTask();
+//     setupGetPriceTask();
-    SatsPerDollarScreen::showScreen();
+//     SatsPerDollarScreen::showScreen();
-}
+// }
 
-void SatsPerDollarScreen::showScreen() {
+// void SatsPerDollarScreen::showScreen() {
-    std::string satsPerDollarString = String(SatsPerDollarScreen::satsPerDollar).c_str();
+//     std::string satsPerDollarString = String(SatsPerDollarScreen::satsPerDollar).c_str();
-    satsPerDollarString.insert(satsPerDollarString.begin(), 7 - satsPerDollarString.length(), ' ');
+//     satsPerDollarString.insert(satsPerDollarString.begin(), 7 - satsPerDollarString.length(), ' ');
-    epdContent[0] = "MSCW/TIME";
+//     epdContent[0] = "MSCW/TIME";
-    for (uint i = 1; i < NUM_SCREENS; i++)
+//     for (uint i = 1; i < NUM_SCREENS; i++)
-    {
+//     {
-        SatsPerDollarScreen::epdContent[i] = satsPerDollarString[i];
+//         SatsPerDollarScreen::epdContent[i] = satsPerDollarString[i];
-    }
+//     }
-}
+// }
 
-void SatsPerDollarScreen::onPriceUpdate(uint price) {
+// void SatsPerDollarScreen::onPriceUpdate(uint price) {
-    SatsPerDollarScreen::satsPerDollar = int(round(1 / float(price) * 10e7));
+//     SatsPerDollarScreen::satsPerDollar = int(round(1 / float(price) * 10e7));
 
-    SatsPerDollarScreen::showScreen();
+//     SatsPerDollarScreen::showScreen();
-}
+// }
 
-std::array<String, NUM_SCREENS> SatsPerDollarScreen::getEpdContent() {
+// std::array<String, NUM_SCREENS> SatsPerDollarScreen::getEpdContent() {
-    return SatsPerDollarScreen::epdContent;
+//     return SatsPerDollarScreen::epdContent;
-}
+// }

src/screens/sats_per_dollar.hpp

@@ -1,17 +1,17 @@
-#pragma once
+// #pragma once
 
-#include "base.hpp"
+// #include "base.hpp"
-#include "config.h"
+// #include "config.h"
-#include "shared.hpp"
+// #include "shared.hpp"
-#include "tasks/epd.hpp"
+// #include "tasks/epd.hpp"
 
-class SatsPerDollarScreen {
+// class SatsPerDollarScreen {
-    protected:
+//     protected:
-        static uint satsPerDollar;
+//         static uint satsPerDollar;
-        static std::array<String, NUM_SCREENS> epdContent;
+//         static std::array<String, NUM_SCREENS> epdContent;
-    public:
+//     public:
-        static void init();
+//         static void init();
-        static void showScreen();
+//         static void showScreen();
-        static void onPriceUpdate(uint price);
+//         static void onPriceUpdate(uint price);
-        static std::array<String, NUM_SCREENS> getEpdContent();
+//         static std::array<String, NUM_SCREENS> getEpdContent();
-};
+// };

src/screens/ticker.cpp

@@ -1,10 +1,15 @@
 #include "ticker.hpp"
 
 uint TickerScreen::price = 12345;
+uint TickerScreen::satsPerDollar = 3000;
+
 std::array<String, NUM_SCREENS> TickerScreen::epdContent = { "", "", "", "", "", "", "" };
 
 void TickerScreen::init() {
+
     TickerScreen::price = preferences.getFloat("btcPrice", 12345);;
+    TickerScreen::satsPerDollar = int(round(1 / preferences.getFloat("btcPrice", 12345) * 10e7));
+
     setupGetPriceTask();
     TickerScreen::showScreen();
 }
@@ -21,9 +26,26 @@ void TickerScreen::showScreen() {
 
 void TickerScreen::onPriceUpdate(uint price) {
     TickerScreen::price = price;
+    TickerScreen::satsPerDollar = int(round(1 / float(price) * 10e7));
+
     TickerScreen::showScreen();
 }
 
 std::array<String, NUM_SCREENS> TickerScreen::getEpdContent() {
     return TickerScreen::epdContent;
 }
+
+std::array<String, NUM_SCREENS> TickerScreen::getEpdContentSats() {
+    std::array<String, NUM_SCREENS> epdContentSats = { "", "", "", "", "", "", "" };
+
+    std::string satsPerDollarString = String(TickerScreen::satsPerDollar).c_str();
+    satsPerDollarString.insert(satsPerDollarString.begin(), NUM_SCREENS - satsPerDollarString.length(), ' ');
+    epdContentSats[0] = "MSCW/TIME";
+    for (uint i = 1; i < NUM_SCREENS; i++)
+    {
+        epdContentSats[i] = satsPerDollarString[i];
+    }
+
+
+    return epdContentSats;
+}

src/screens/ticker.hpp

@@ -9,11 +9,13 @@ class TickerScreen
 {
 protected:
     static uint price;
-    static std::array<String, NUM_SCREENS> epdContent;
+    static uint satsPerDollar;
 
+    static std::array<String, NUM_SCREENS> epdContent;
 public:
     static void init();
     static void showScreen();
     static void onPriceUpdate(uint price);
     static std::array<String, NUM_SCREENS> getEpdContent();
+    static std::array<String, NUM_SCREENS> getEpdContentSats();
 };

src/shared.hpp

@@ -1,11 +1,18 @@
 #pragma once
 
+#include "config.h"
 #include <Arduino.h>
 //##include <Crypto.h>
 #include <ArduinoJson.h>
 #include <WiFi.h>
 #include <map>
 
+#ifdef IS_BW
+#include <GxEPD2_BW.h>
+#else 
+#include <GxEPD2_3C.h>
+#endif
+
 #include <WiFiClientSecure.h>
 #ifndef NO_MCP
 #include <Adafruit_MCP23X17.h>
@@ -19,7 +26,7 @@
 typedef std::function<void()> EventCallback;
 typedef std::function<void(uint number)> EventCallbackWithNumber;
 
-extern WiFiClient wifiClientInsecure;
+//extern WiFiClient wifiClientInsecure;
 extern WiFiClientSecure wifiClient;
 
 extern ESP32Time rtc;
@@ -32,9 +39,11 @@ extern bool timerRunning;
 extern uint timerSeconds;
 extern uint32_t moment;
 
+extern GxEPD2_BW<GxEPD2_213_B74, GxEPD2_213_B74::HEIGHT> displays[NUM_SCREENS];
+
 #ifndef NO_MCP
 extern Adafruit_MCP23X17 mcp;
-extern const int MCP_INT_PIN;
+extern const char MCP_INT_PIN;
 #endif
 #ifdef WITH_RGB_LED
 extern Adafruit_NeoPixel pixels;
@@ -54,11 +63,15 @@ const uint screenCount = sizeof(screens) / sizeof(int);
 
 struct SpiRamAllocator {
   void* allocate(size_t size) {
-                return ps_malloc(size);
+    return heap_caps_malloc(size, MALLOC_CAP_SPIRAM);
-
   }
+
   void deallocate(void* pointer) {
-                free(pointer);
+    heap_caps_free(pointer);
+  }
+
+  void* reallocate(void* ptr, size_t new_size) {
+    return heap_caps_realloc(ptr, new_size, MALLOC_CAP_SPIRAM);
   }
 };
 

src/tasks/blocknotify.cpp

@@ -20,11 +20,11 @@ void checkBitcoinBlock(void *pvParameters)
     uint blockHeight = preferences.getUInt("blockHeight", currentBlockHeight);
  
   
-    useBitcoind = preferences.getBool("useNode", false) && wifiClientInsecure.connect(preferences.getString("rpcHost", BITCOIND_HOST).c_str(), preferences.getUInt("rpcPort", BITCOIND_PORT));
+    useBitcoind = preferences.getBool("useNode", false) && wifiClient.connect(preferences.getString("rpcHost", BITCOIND_HOST).c_str(), preferences.getUInt("rpcPort", BITCOIND_PORT));
     if (useBitcoind)
-        Serial.println("bitcoind node is reachable, using this for blocks.");
+        Serial.println(F("bitcoind node is reachable, using this for blocks."));
     else
-        Serial.println("bitcoind node is not reachable, using mempool API instead.");
+        Serial.println(F("bitcoind node is not reachable, using mempool API instead."));
 
     IPAddress result;
 
@@ -36,53 +36,53 @@ void checkBitcoinBlock(void *pvParameters)
 
     for (;;)
     {
-        HTTPClient http;
+        HTTPClient *http = new HTTPClient();
-        http.setUserAgent(USER_AGENT);
+        http->setUserAgent(USER_AGENT);
 
         if (useBitcoind)
         {
             StaticJsonDocument<200> jsonDoc;
 
-            http.begin(preferences.getString("rpcHost", BITCOIND_HOST).c_str(), preferences.getUInt("rpcPort", BITCOIND_PORT));
+            http->begin(preferences.getString("rpcHost", BITCOIND_HOST).c_str(), preferences.getUInt("rpcPort", BITCOIND_PORT));
-            http.addHeader("Content-Type", "application/json");
+            http->addHeader("Content-Type", "application/json");
 
             const String payload = "{\"jsonrpc\":\"1.0\",\"id\":\"current_block_height\",\"method\":\"getblockcount\",\"params\":[]}";
             const String authEncoded = base64::encode(preferences.getString("rpcUser", BITCOIND_RPC_USER) + ":" + preferences.getString("rpcPass", BITCOIND_RPC_PASS));
-            http.addHeader("Authorization", "Basic " + authEncoded);
+            http->addHeader("Authorization", "Basic " + authEncoded);
 
-            int httpCode = http.POST(payload);
+            int httpCode = http->POST(payload);
             if (httpCode > 0 || httpCode != HTTP_CODE_UNAUTHORIZED)
             {
-                String response = http.getString();
+                String response = http->getString();
                 deserializeJson(jsonDoc, response);
                 blockHeight = jsonDoc["result"];
             }
             else
             {
-                Serial.println("Error in HTTP request to bitcoind");
+                Serial.println(F("Error in HTTP request to bitcoind"));
             }
 
-            http.end();
+            http->end();
         }
         else
         {
-            http.begin("https://" + preferences.getString("mempoolInstance", DEFAULT_MEMPOOL_INSTANCE) + "/api/blocks/tip/height");
+            http->begin("https://" + preferences.getString("mempoolInstance", DEFAULT_MEMPOOL_INSTANCE) + "/api/blocks/tip/height");
-            int httpCode = http.GET();
+            int httpCode = http->GET();
 
             if (httpCode > 0 && httpCode == HTTP_CODE_OK)
             {
-                String blockHeightStr = http.getString();
+                String blockHeightStr = http->getString();
                 blockHeight = blockHeightStr.toInt();
             }
             else
             {
                 Serial.print(F("Error in HTTP request to mempool API: "));
                 Serial.print(httpCode);
-                Serial.println(http.errorToString(httpCode));
+                Serial.println(http->errorToString(httpCode));
 
             }
 
-            http.end();
+            http->end();
         }
         if (blockHeight > currentBlockHeight)
         {
@@ -93,7 +93,7 @@ void checkBitcoinBlock(void *pvParameters)
             currentBlockHeight = blockHeight;
             preferences.putUInt("blockHeight", currentBlockHeight);
         }
-
+        delete http; 
         vTaskDelay(pdMS_TO_TICKS(BLOCKNOTIFY_WAIT_TIME)); // wait 1 minute before checking again
     }
 }
@@ -126,7 +126,7 @@ void setupBlockNotify()
     //  xTaskCreate(bitcoinEventHandler, "bitcoinEventHandler", 10000, NULL, 110, NULL);
 }
 
-void registerNewBlockCallback(EventCallbackWithNumber cb)
+void registerNewBlockCallback(const EventCallbackWithNumber cb)
 {
     blockEventCallbacks.push_back(cb);
 }

src/tasks/blocknotify.hpp

@@ -22,6 +22,6 @@ void checkBitcoinBlock(void *pvParameters);
 //void bitcoinEventHandler(void *pvParameters);
 void setupBlockNotify();
 
-void registerNewBlockCallback(EventCallbackWithNumber cb);
+void registerNewBlockCallback(const EventCallbackWithNumber cb);
 int getBlockFromBitcoind();
 int getBlockFromMempoolSpace();

src/tasks/button.cpp

@@ -47,7 +47,7 @@ void buttonTask(void *parameter)
 void IRAM_ATTR handleButtonInterrupt()
 {
     buttonPressed = true;
-    // Serial.println("ISR");
+    // Serial.println(F("ISR"));
     // uint pin = mcp.getLastInterruptPin();
 
     // if (pin == 1)
@@ -70,7 +70,7 @@ void setupButtonTask()
     // attachInterrupt(MCP_INT_PIN, handleButtonInterrupt, FALLING);
 }
 
-void registerNewButtonCallback(EventCallback cb)
+void registerNewButtonCallback(const EventCallback cb)
 {
     buttonEventCallbacks.push_back(cb);
 }

src/tasks/button.hpp

@@ -14,7 +14,7 @@ extern TaskHandle_t buttonTaskHandle;
 
 void buttonTask(void *pvParameters);
 void setupButtonTask();
-void registerNewButtonCallback(EventCallback cb);
+void registerNewButtonCallback(const EventCallback cb);
 void IRAM_ATTR handleButtonInterrupt();
 
 #endif

src/tasks/epd.cpp

@@ -1,17 +1,12 @@
 #include "epd.hpp"
 
 #ifdef IS_S3
-// reversed
+const char EPD_CS[NUM_SCREENS] = {2, 4, 6, 10, 33, 21, 17};
-// const int EPD_CS[7] = {17, 21, 33, 10, 6, 4, 2};
+const char EPD_BUSY[NUM_SCREENS] = {3, 5, 7, 9, 37, 18, 16};
-// const int EPD_BUSY[7] = {16, 18, 37, 9, 7, 5, 3};
+const char EPD_RESET_MPD[NUM_SCREENS] = {8, 9, 10, 11, 12, 13, 14};
-// const int EPD_RESET_MPD[7] = {14, 13, 12, 11, 10, 9, 8};
 
-const int EPD_CS[NUM_SCREENS] = {2, 4, 6, 10, 33, 21, 17};
+const char EPD_DC = 14;
-const int EPD_BUSY[NUM_SCREENS] = {3, 5, 7, 9, 37, 18, 16};
+const char RST_PIN = 15;
-const int EPD_RESET_MPD[NUM_SCREENS] = {8, 9, 10, 11, 12, 13, 14};
-
-const int EPD_DC = 14;
-const int RST_PIN = 15;
 #elif defined(IS_S2)
 
 // reversed
@@ -56,7 +51,7 @@ GxEPD2_BW<GxEPD2_213_B74, GxEPD2_213_B74::HEIGHT> displays[NUM_SCREENS] = {
     GxEPD2_213_B74(EPD_CS[6], EPD_DC, /*RST=*/-1, EPD_BUSY[6]),
 };
 
-//GxEPD2_BW<GxEPD2_213_B74, GxEPD2_213_B74::HEIGHT> * displays2 = (GxEPD2_BW<GxEPD2_213_B74, GxEPD2_213_B74::HEIGHT> *) ps_malloc(7 * sizeof (GxEPD2_BW<GxEPD2_213_B74, GxEPD2_213_B74::HEIGHT>));
+// GxEPD2_BW<GxEPD2_213_B74, GxEPD2_213_B74::HEIGHT> * displays2 = (GxEPD2_BW<GxEPD2_213_B74, GxEPD2_213_B74::HEIGHT> *) ps_malloc(7 * sizeof (GxEPD2_BW<GxEPD2_213_B74, GxEPD2_213_B74::HEIGHT>));
 
 const int SEM_WAIT_TIME = 10000;
 
@@ -81,7 +76,10 @@ std::array<String, 7> currentEpdContent;
 std::array<String, 7> epdContent;
 TaskHandle_t tasks[NUM_SCREENS];
 SemaphoreHandle_t epdUpdateSemaphore[NUM_SCREENS];
-uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
+//
+
+//int *qrcode = (int *) ps_malloc(qrcodegen_BUFFER_LEN_MAX * sizeof(uint8_t));
+
 
 void setupDisplays()
 {
@@ -91,7 +89,7 @@ void setupDisplays()
 
 void resetAllDisplays()
 {
-    #ifdef NO_MCP
+#ifdef NO_MCP
     digitalWrite(RST_PIN, HIGH);
     pinMode(RST_PIN, OUTPUT);
     delay(20);
@@ -99,23 +97,24 @@ void resetAllDisplays()
     delay(20);
     digitalWrite(RST_PIN, HIGH);
     delay(200);
-    #else 
+#else
-    for (int i = 0; i < NUM_SCREENS; i++) {
+    for (int i = 0; i < NUM_SCREENS; i++)
+    {
         resetSingleDisplay(i);
     }
-    #endif NO_MCP
+#endif
 }
 
 void resetSingleDisplay(int i)
 {
-    #ifndef NO_MCP
+#ifndef NO_MCP
     mcp.digitalWrite(EPD_RESET_MPD[i], HIGH);
     delay(20);
     mcp.digitalWrite(EPD_RESET_MPD[i], LOW);
     delay(20);
     mcp.digitalWrite(EPD_RESET_MPD[i], HIGH);
     delay(200);
-    #endif
+#endif
 }
 
 void initDisplays()
@@ -166,7 +165,7 @@ void taskEpd(void *pvParameters)
             epdContent = TickerScreen::getEpdContent();
             break;
         case SCREEN_MSCW_TIME:
-            epdContent = SatsPerDollarScreen::getEpdContent();
+            epdContent = TickerScreen::getEpdContentSats();
             break;
         case SCREEN_TIME:
             epdContent = TimeScreen::getEpdContent();
@@ -182,10 +181,8 @@ void taskEpd(void *pvParameters)
             break;
         }
 
-
         bool updatedThisCycle = false;
 
-
         for (uint i = 0; i < NUM_SCREENS; i++)
         {
             if (epdContent[i].compareTo(currentEpdContent[i]) != 0)
@@ -214,12 +211,12 @@ void taskEpd(void *pvParameters)
             }
         }
 
-        #ifdef WITH_RGB_LED
+#ifdef WITH_RGB_LED
         if (updatedThisCycle && preferences.getBool("ledFlashOnUpd", false))
         {
             xTaskNotifyGive(ledHandlerTaskHandle);
         }
-        #endif
+#endif
 
         vTaskDelay(pdMS_TO_TICKS(1000));
     }
@@ -346,96 +343,3 @@ void updateDisplay(void *pvParameters)
     }
 }
 
-void showSetupQr(String ssid, String password)
-{
-    int displayIndex = 6;
-    
-    const String text = "WIFI:S:" + ssid + ";T:WPA;P:" + password + ";;"; 
-
-    uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
-    bool ok = qrcodegen_encodeText(text.c_str(), tempBuffer, qrcode, qrcodegen_Ecc_LOW,
-                                qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
-
-    const int size = qrcodegen_getSize(qrcode);
-
-    const int padding = floor(float(displays[displayIndex].width() - (size * 4)) / 2);
-    const int paddingY = floor(float(displays[displayIndex].height() - (size * 4)) / 2);
- 
-    displays[displayIndex].setPartialWindow(0, 0, displays[displayIndex].width(), displays[displayIndex].height());
-    displays[displayIndex].firstPage();
-
-    displays[displayIndex].fillScreen(GxEPD_WHITE);
-    int border = 0;
-    do
-    {
-        for (int y = -border; y < size * 4 + border; y++)
-        {
-            for (int x = -border; x < size * 4 + border; x++)
-            {
-                displays[displayIndex].drawPixel(padding + x, paddingY + y, qrcodegen_getModule(qrcode, floor(float(x) / 4), floor(float(y) / 4)) ? GxEPD_BLACK : GxEPD_WHITE);
-            }
-        }
-    } while (displays[displayIndex].nextPage());
-
-    displayIndex = 4;
-
-    displays[displayIndex].setPartialWindow(0, 0, displays[displayIndex].width(), displays[displayIndex].height());
-    displays[displayIndex].firstPage();
-
-    displays[displayIndex].fillScreen(GxEPD_WHITE);
-    do
-    {
-        displays[displayIndex].setTextColor(GxEPD_BLACK);
-        displays[displayIndex].setCursor(0, 50);
-        displays[displayIndex].setFont(&FreeSansBold9pt7b);
-        displays[displayIndex].println("SSID:");
-        displays[displayIndex].setFont(&FreeSans9pt7b);
-        displays[displayIndex].println(ssid);
-        displays[displayIndex].println("");
-        displays[displayIndex].setFont(&FreeSansBold9pt7b);
-        displays[displayIndex].println("Password:");
-        displays[displayIndex].setFont(&FreeSans9pt7b);
-        displays[displayIndex].println(password);
-    } while (displays[displayIndex].nextPage());
-
-    displayIndex = 2;
-
-    displays[displayIndex].setPartialWindow(0, 0, displays[displayIndex].width(), displays[displayIndex].height());
-    displays[displayIndex].firstPage();
-
-    displays[displayIndex].fillScreen(GxEPD_WHITE);
-    do
-    {
-        displays[displayIndex].setTextColor(GxEPD_BLACK);
-        displays[displayIndex].setCursor(0, 50);
-        displays[displayIndex].setFont(&FreeSans9pt7b);
-        displays[displayIndex].println("To setup");
-        displays[displayIndex].println("scan QR or");
-        displays[displayIndex].println("connect");
-        displays[displayIndex].println("manually");
-    } while (displays[displayIndex].nextPage());
-
-    displayIndex = 0;
-
-    displays[displayIndex].setPartialWindow(0, 0, displays[displayIndex].width(), displays[displayIndex].height());
-    displays[displayIndex].firstPage();
-
-    displays[displayIndex].fillScreen(GxEPD_WHITE);
-    do
-    {
-        displays[displayIndex].setTextColor(GxEPD_BLACK);
-        displays[displayIndex].setCursor(0, 50);
-        displays[displayIndex].setFont(&FreeSansBold9pt7b);
-        displays[displayIndex].println("Welcome!");
-    } while (displays[displayIndex].nextPage());
-
-    for (int i = 1; i < NUM_SCREENS; (i = i+2)) {
-        displays[i].setPartialWindow(0, 0, displays[i].width(), displays[i].height());
-        displays[i].fillScreen(GxEPD_WHITE);
-        displays[i].display(true);
-    }
-
-    for (int i = 0; i < NUM_SCREENS; i++) {
-        displays[i].hibernate();
-    }
-}

src/tasks/epd.hpp

@@ -5,8 +5,7 @@
 #else 
 #include <GxEPD2_3C.h>
 #endif
-#include <Fonts/FreeSansBold9pt7b.h>
+
-#include <Fonts/FreeSans9pt7b.h>
 
 #include <string>
 #include "screens/blockheight.hpp"
@@ -17,7 +16,6 @@
 #include "screens/custom_text.hpp"
 #include "screens/halvingcountdown.hpp"
 
-#include "qrcodegen.h"
 
 #include <freertos/FreeRTOS.h>
 #include <freertos/task.h>
@@ -47,4 +45,3 @@ void refreshDisplay(void *pvParameters);
 void fullRefresh(void *pvParameters);
 void updateDisplay(void *pvParameters);
 //void genQrCode(String text, uint8_t *qrcode[qrcodegen_BUFFER_LEN_MAX]);
-void showSetupQr(String ssid, String password);

src/tasks/get_price.cpp

@@ -14,29 +14,37 @@ TaskHandle_t getPriceTaskHandle;
 
 void taskGetPrice(void *pvParameters)
 {
+    IPAddress result;
+
+    int err = WiFi.hostByName("api.coingecko.com", result) ;
+
+    if (err != 1) {
+        flashTemporaryLights(255, 255, 0);
+    }
+
     for (;;)
     {
-        HTTPClient http;
+        HTTPClient* http = new HTTPClient();
-        http.setUserAgent(USER_AGENT);
+        http->setUserAgent(USER_AGENT);
 
         if (true)
         {
             // Send HTTP request to CoinGecko API
-            http.begin(cgApiUrl);
+            http->begin(cgApiUrl);
 
-            int httpCode = http.GET();
+            int httpCode = http->GET();
 
             // Parse JSON response and extract average price
             float usdPrice, eurPrice;
             if (httpCode == 200)
             {
-                String payload = http.getString();
+                String payload = http->getString();
                 SpiRamJsonDocument doc(768);
                 deserializeJson(doc, payload);
                 JsonObject bpi = doc["bitcoin"];
                 usdPrice = bpi["usd"];
                 eurPrice = bpi["eur"];
-                for (auto &callback : priceEventCallbacks)
+                for (EventCallbackWithNumber &callback : priceEventCallbacks)
                 { // Loop through all the event callbacks and call them
                     callback(usdPrice);
                 }
@@ -52,21 +60,21 @@ void taskGetPrice(void *pvParameters)
         } else {
 
             // Send HTTP request to CoinDesk API
-            http.begin(apiUrl);
+            http->begin(apiUrl);
 
-            int httpCode = http.GET();
+            int httpCode = http->GET();
 
             // Parse JSON response and extract average price
             float usdPrice, eurPrice;
             if (httpCode == 200)
             {
-                String payload = http.getString();
+                String payload = http->getString();
                 SpiRamJsonDocument doc(768);
                 deserializeJson(doc, payload);
                 JsonObject bpi = doc["bpi"];
                 usdPrice = bpi["USD"]["rate_float"];
                 eurPrice = bpi["EUR"]["rate_float"];
-                for (auto &callback : priceEventCallbacks)
+                for (EventCallbackWithNumber &callback : priceEventCallbacks)
                 { // Loop through all the event callbacks and call them
                     callback(usdPrice);
                 }
@@ -81,7 +89,9 @@ void taskGetPrice(void *pvParameters)
             }
         }
 
-        http.end();
+        http->end();
+
+        delete http;
 
         vTaskDelay(pdMS_TO_TICKS(PRICE_WAIT_TIME));
     }
@@ -91,12 +101,12 @@ void setupGetPriceTask()
 {
     if (getPriceTaskHandle == nullptr)
     {
-        xTaskCreate(taskGetPrice, "getPrice", 8192, NULL, 1, &getPriceTaskHandle);
+        xTaskCreate(taskGetPrice, "getPrice", 6144, NULL, 1, &getPriceTaskHandle);
         vTaskSuspend(getPriceTaskHandle);
     }
 }
 
-void registerNewPriceCallback(EventCallbackWithNumber cb)
+void registerNewPriceCallback(const EventCallbackWithNumber cb)
 {
     priceEventCallbacks.push_back(cb);
 }

src/tasks/get_price.hpp

@@ -6,9 +6,10 @@
 #include <freertos/task.h>
 #include "shared.hpp"
 #include "config.h"
+#include "lib/functions.hpp"
 
 extern TaskHandle_t getPriceTaskHandle;
 
 void taskGetPrice(void *pvParameters);
 void setupGetPriceTask();
-void registerNewPriceCallback(EventCallbackWithNumber cb);
+void registerNewPriceCallback(const EventCallbackWithNumber cb);

src/tasks/minute.cpp

@@ -38,7 +38,7 @@ void setupMinuteEvent()
     xTaskCreate(minuteTask, "MinuteTask", 2048, NULL, 1, &minuteTaskHandle); // Create the FreeRTOS task
 }
 
-void registerNewMinuteCallback(EventCallback cb)
+void registerNewMinuteCallback(const EventCallback cb)
 {
   minuteEventCallbacks.push_back(cb);
 } 

src/tasks/minute.hpp

@@ -11,4 +11,4 @@ extern TaskHandle_t minuteTaskHandle;
 
 void minuteTask(void *pvParameters);
 void setupMinuteEvent();
-void registerNewMinuteCallback(EventCallback cb);
+void registerNewMinuteCallback(const EventCallback cb);