Prepare for automatic OTA updates

.github/workflows/tagging.yml

@@ -56,7 +56,10 @@ jobs:
         run: mkdir -p ${{ matrix.chip.name }}_${{ matrix.epd_variant }} && esptool.py --chip ${{ matrix.chip.version }} merge_bin -o ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/${{ matrix.chip.name }}_${{ matrix.epd_variant }}.bin --flash_mode dio 0x0000 .pio/build/${{ matrix.chip.name }}_${{ matrix.epd_variant }}/bootloader.bin 0x8000 .pio/build/${{ matrix.chip.name }}_${{ matrix.epd_variant }}/partitions.bin 0xe000 .pio/boot_app0.bin 0x10000 .pio/build/${{ matrix.chip.name }}_${{ matrix.epd_variant }}/firmware.bin 0x369000 .pio/build/${{ matrix.chip.name }}_${{ matrix.epd_variant }}/littlefs.bin
 
       - name: Create checksum for merged binary
-        run: shasum -a 256 ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/${{ matrix.chip.name }}_${{ matrix.epd_variant }}.bin | awk '{print $1}' > ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/${{ matrix.chip.name }}_${{ matrix.epd_variant }}.sha256
+        run: shasum -a 256 ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/${{ matrix.chip.name }}_${{ matrix.epd_variant }}.bin | awk '{print $1}' > ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/${{ matrix.chip.name }}_${{ matrix.epd_variant }}.bin.sha256
+
+      - name: Create checksum for littlefs partition
+        run: shasum -a 256 ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/littlefs.bin | awk '{print $1}' > ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/littlefs.bin.sha256
 
       - name: Copy all artifacts to output folder
         run: cp .pio/build/${{ matrix.chip.name }}_${{ matrix.epd_variant }}/*.bin .pio/boot_app0.bin ${{ matrix.chip.name }}_${{ matrix.epd_variant }}

src/lib/ota.cpp

@@ -2,9 +2,12 @@
 
 TaskHandle_t taskOtaHandle = NULL;
 bool isOtaUpdating = false;
+QueueHandle_t otaQueue;
 
-void setupOTA() {
+void setupOTA()
-  if (preferences.getBool("otaEnabled", DEFAULT_OTA_ENABLED)) {
+{
+  if (preferences.getBool("otaEnabled", DEFAULT_OTA_ENABLED))
+  {
     ArduinoOTA.onStart(onOTAStart);
 
     ArduinoOTA.onProgress(onOTAProgress);
@@ -16,31 +19,38 @@ void setupOTA() {
     ArduinoOTA.setRebootOnSuccess(false);
     ArduinoOTA.begin();
     // downloadUpdate();
+    otaQueue = xQueueCreate(1, sizeof(UpdateMessage));
 
-    xTaskCreate(handleOTATask, "handleOTA", 4096, NULL, tskIDLE_PRIORITY,
+    xTaskCreate(handleOTATask, "handleOTA", 8192, NULL, 20,
                 &taskOtaHandle);
   }
 }
 
-void onOTAProgress(unsigned int progress, unsigned int total) {
+void onOTAProgress(unsigned int progress, unsigned int total)
+{
   uint percentage = progress / (total / 100);
   pixels.fill(pixels.Color(0, 255, 0));
-  if (percentage < 100) {
+  if (percentage < 100)
+  {
     pixels.setPixelColor(0, pixels.Color(0, 0, 0));
   }
-  if (percentage < 75) {
+  if (percentage < 75)
+  {
     pixels.setPixelColor(1, pixels.Color(0, 0, 0));
   }
-  if (percentage < 50) {
+  if (percentage < 50)
+  {
     pixels.setPixelColor(2, pixels.Color(0, 0, 0));
   }
-  if (percentage < 25) {
+  if (percentage < 25)
+  {
     pixels.setPixelColor(3, pixels.Color(0, 0, 0));
   }
   pixels.show();
 }
 
-void onOTAStart() {
+void onOTAStart()
+{
   forceFullRefresh();
   std::array<String, NUM_SCREENS> epdContent = {"U", "P", "D", "A",
                                                 "T", "E", "!"};
@@ -58,76 +68,296 @@ void onOTAStart() {
   vTaskSuspend(ledTaskHandle);
   vTaskSuspend(buttonTaskHandle);
 
-  stopWebServer();
+  // stopWebServer();
   stopBlockNotify();
   stopPriceNotify();
 }
 
-void handleOTATask(void *parameter) {
+void handleOTATask(void *parameter)
-  for (;;) {
+{
+  UpdateMessage msg;
+
+  for (;;)
+  {
+    if (xQueueReceive(otaQueue, &msg, 0) == pdTRUE)
+    {
+      int result = downloadUpdateHandler(msg.updateType);
+    }
+
     ArduinoOTA.handle(); // Allow OTA updates to occur
     vTaskDelay(pdMS_TO_TICKS(2000));
   }
 }
 
-// void downloadUpdate() {
+String getLatestRelease(const String &fileToDownload)
-//   WiFiClientSecure client;
+{
-//   client.setInsecure();
+  String releaseUrl = "https://api.github.com/repos/btclock/btclock_v3/releases/latest";
-//   HTTPClient http;
+  WiFiClientSecure client;
-//   http.setUserAgent(USER_AGENT);
+  client.setCACert(github_root_ca);
+  HTTPClient http;
+  http.begin(client, releaseUrl);
+  http.setUserAgent(USER_AGENT);
 
-//   // Send HTTP request to CoinGecko API
+  int httpCode = http.GET();
-//   http.useHTTP10(true);
 
-//   http.begin(client,
+  String downloadUrl = "";
-//              "https://api.github.com/repos/btclock/btclock_v3/releases/latest");
-//   int httpCode = http.GET();
 
-//   if (httpCode == 200) {
+  if (httpCode > 0)
-//     //    WiFiClient * stream = http->getStreamPtr();
+  {
+    String payload = http.getString();
 
-//     JsonDocument filter;
+    JsonDocument doc;
+    deserializeJson(doc, payload);
 
-//     JsonObject filter_assets_0 = filter["assets"].add<JsonObject>();
+    JsonArray assets = doc["assets"];
-//     filter_assets_0["name"] = true;
-//     filter_assets_0["browser_download_url"] = true;
 
-//     JsonDocument doc;
+    for (JsonObject asset : assets)
+    {
+      if (asset["name"] == fileToDownload)
+      {
+        downloadUrl = asset["browser_download_url"].as<String>();
+        break;
+      }
+    }
+    Serial.printf("Latest release URL: %s\r\n", downloadUrl.c_str());
+  }
+  return downloadUrl;
+}
 
-//     DeserializationError error = deserializeJson(
+int downloadUpdateHandler(char updateType)
-//         doc, http.getStream(), DeserializationOption::Filter(filter));
+{
+  WiFiClientSecure client;
+  client.setCACert(github_root_ca);
+  HTTPClient http;
+  http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
 
-//     if (error) {
+  String latestRelease = "";
-//       Serial.print("deserializeJson() failed: ");
-//       Serial.println(error.c_str());
-//       return;
-//     }
 
-//     String downloadUrl;
+  switch (updateType)
-//     for (JsonObject asset : doc["assets"].as<JsonArray>()) {
+  {
-//       if (asset["name"].as<String>().compareTo("firmware.bin") == 0) {
+  case UPDATE_FIRMWARE:
-//         downloadUrl = asset["browser_download_url"].as<String>();
+  {
-//         break;
+    latestRelease = getLatestRelease(getFirmwareFilename());
-//       }
+  }
-//     }
+  break;
+  case UPDATE_WEBUI:
+  {
+    latestRelease = getLatestRelease("littlefs.bin");
+    updateWebUi(latestRelease, U_SPIFFS);
+    return 0;
+  }
+  break;
+  }
 
-//     Serial.printf("Download update from %s", downloadUrl);
+  if (latestRelease.isEmpty())
+  {
+    return 503;
+  }
+  // First, download the expected SHA256
+  String expectedSHA256 = downloadSHA256(getFirmwareFilename());
+  if (expectedSHA256.isEmpty())
+  {
+    Serial.println("Failed to get SHA256 checksum. Aborting update.");
+    return false;
+  }
 
-//     // esp_http_client_config_t config = {
+  http.begin(client, latestRelease);
-//     //     .url = CONFIG_FIRMWARE_UPGRADE_URL,
+  http.setUserAgent(USER_AGENT);
-//     // };
-//     // esp_https_ota_config_t ota_config = {
-//     //     .http_config = &config,
-//     // };
-//     // esp_err_t ret = esp_https_ota(&ota_config);
-//     // if (ret == ESP_OK)
-//     // {
-//     //   esp_restart();
-//     // }
-//   }
-// }
 
-void onOTAError(ota_error_t error) {
+  int httpCode = http.GET();
+  if (httpCode == HTTP_CODE_OK)
+  {
+    int contentLength = http.getSize();
+    if (contentLength > 0)
+    {
+      // Allocate memory to store the firmware
+      uint8_t *firmware = (uint8_t *)malloc(contentLength);
+      if (!firmware)
+      {
+        Serial.println(F("Not enough memory to store firmware"));
+        return false;
+      }
+
+      WiFiClient *stream = http.getStreamPtr();
+      size_t bytesRead = 0;
+      while (bytesRead < contentLength)
+      {
+        size_t available = stream->available();
+        if (available)
+        {
+          size_t readBytes = stream->readBytes(firmware + bytesRead, available);
+          bytesRead += readBytes;
+        }
+        yield(); // Allow background tasks to run
+      }
+
+      if (bytesRead != contentLength)
+      {
+        Serial.println("Failed to read entire firmware");
+        free(firmware);
+        return false;
+      }
+
+      // Calculate SHA256
+      String calculated_sha256 = calculateSHA256(firmware, contentLength);
+
+      Serial.print("Calculated checksum: ");
+      Serial.println(calculated_sha256);
+      Serial.print("Expected checksum:   ");
+      Serial.println(expectedSHA256);
+
+      if (calculated_sha256 != expectedSHA256)
+      {
+        Serial.println("Checksum mismatch. Aborting update.");
+        free(firmware);
+        return false;
+      }
+      
+      Update.onProgress(onOTAProgress);
+
+      int updateType = (updateType == UPDATE_WEBUI) ? U_SPIFFS : U_FLASH;
+
+      if (Update.begin(contentLength, updateType))
+      {
+        size_t written = Update.writeStream(*stream);
+
+        if (written == contentLength)
+        {
+          Serial.println("Written : " + String(written) + " successfully");
+        }
+        else
+        {
+          Serial.println("Written only : " + String(written) + "/" + String(contentLength) + ". Retry?");
+        }
+
+        if (Update.end())
+        {
+          Serial.println("OTA done!");
+          if (Update.isFinished())
+          {
+            Serial.println("Update successfully completed. Rebooting.");
+            ESP.restart();
+          }
+          else
+          {
+            Serial.println("Update not finished? Something went wrong!");
+          }
+        }
+        else
+        {
+          Serial.println("Error Occurred. Error #: " + String(Update.getError()));
+        }
+      }
+      else
+      {
+        Serial.println("Not enough space to begin OTA");
+      }
+    }
+    else
+    {
+      Serial.println("Invalid content length");
+    }
+  }
+  else
+  {
+    Serial.printf("HTTP error: %d\n", httpCode);
+    return 503;
+  }
+  http.end();
+
+  return 200;
+}
+
+void updateWebUi(String latestRelease, int command)
+{
+  WiFiClientSecure client;
+  client.setCACert(github_root_ca);
+  HTTPClient http;
+  http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
+  http.begin(client, latestRelease);
+  http.setUserAgent(USER_AGENT);
+
+  int httpCode = http.GET();
+  if (httpCode == HTTP_CODE_OK)
+  {
+    int contentLength = http.getSize();
+    if (contentLength > 0)
+    {
+      uint8_t *buffer = (uint8_t *)malloc(contentLength);
+      if (buffer)
+      {
+        WiFiClient *stream = http.getStreamPtr();
+        size_t written = stream->readBytes(buffer, contentLength);
+
+        if (written == contentLength)
+        {
+          String expectedSHA256 = "";
+          if (command == U_FLASH)
+          {
+            expectedSHA256 = downloadSHA256(getFirmwareFilename());
+            Serial.print("Expected checksum:   ");
+            Serial.println(expectedSHA256);
+          }
+
+          String calculated_sha256 = calculateSHA256(buffer, contentLength);
+          Serial.print("Checksum is ");
+          Serial.println(calculated_sha256);
+          if ((command == U_FLASH && expectedSHA256.equals(calculated_sha256)) || command == U_SPIFFS)
+          {
+            Serial.println("Checksum verified. Proceeding with update.");
+
+            Update.onProgress(onOTAProgress);
+
+            if (Update.begin(contentLength, command))
+            {
+              onOTAStart();
+
+              Update.write(buffer, contentLength);
+              if (Update.end())
+              {
+                Serial.println("Update complete. Rebooting.");
+                ESP.restart();
+              }
+              else
+              {
+                Serial.println("Error in update process.");
+              }
+            }
+            else
+            {
+              Serial.println("Not enough space to begin OTA");
+            }
+          }
+          else
+          {
+            Serial.println("Checksum mismatch. Aborting update.");
+          }
+        }
+        else
+        {
+          Serial.println("Error downloading firmware");
+        }
+        free(buffer);
+      }
+      else
+      {
+        Serial.println("Not enough memory to allocate buffer");
+      }
+    }
+    else
+    {
+      Serial.println("Invalid content length");
+    }
+  }
+  else
+  {
+    Serial.print(httpCode);
+    Serial.println("Error on HTTP request");
+  }
+}
+
+void onOTAError(ota_error_t error)
+{
   Serial.println(F("\nOTA update error, restarting"));
   Wire.end();
   SPI.end();
@@ -136,7 +366,8 @@ void onOTAError(ota_error_t error) {
   ESP.restart();
 }
 
-void onOTAComplete() {
+void onOTAComplete()
+{
   Serial.println(F("\nOTA update finished"));
   Wire.end();
   SPI.end();
@@ -144,6 +375,37 @@ void onOTAComplete() {
   ESP.restart();
 }
 
-bool getIsOTAUpdating() {
+bool getIsOTAUpdating()
+{
   return isOtaUpdating;
 }
+
+String downloadSHA256(const String &filename)
+{
+  String sha256Url = getLatestRelease(filename + ".sha256");
+  if (sha256Url.isEmpty())
+  {
+    Serial.println("Failed to get SHA256 file URL");
+    return "";
+  }
+
+  WiFiClientSecure client;
+  client.setCACert(github_root_ca);
+  HTTPClient http;
+  http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
+  http.begin(client, sha256Url);
+  http.setUserAgent(USER_AGENT);
+
+  int httpCode = http.GET();
+  if (httpCode == HTTP_CODE_OK)
+  {
+    String sha256 = http.getString();
+    sha256.trim(); // Remove any whitespace or newline characters
+    return sha256;
+  }
+  else
+  {
+    Serial.printf("Failed to download SHA256 file. HTTP error: %d\n", httpCode);
+    return "";
+  }
+}

src/lib/ota.hpp

@@ -1,9 +1,20 @@
+#pragma once
+
 #include <Arduino.h>
 #include <ArduinoOTA.h>
 
 #include "lib/config.hpp"
 #include "lib/shared.hpp"
 
+#ifndef UPDATE_MESSAGE_HPP
+#define UPDATE_MESSAGE_HPP
+typedef struct {
+    char updateType;
+} UpdateMessage;
+#endif 
+
+extern QueueHandle_t otaQueue;
+
 void setupOTA();
 void onOTAStart();
 void handleOTATask(void *parameter);
@@ -11,5 +22,10 @@ void onOTAProgress(unsigned int progress, unsigned int total);
 // void downloadUpdate();
 void onOTAError(ota_error_t error);
 void onOTAComplete();
+int downloadUpdateHandler(char updateType);
+String getLatestRelease(const String& fileToDownload);
 
 bool getIsOTAUpdating();
+
+void updateWebUi(String latestRelease, int command);
+String downloadSHA256(const String& filename);

src/lib/shared.cpp

@@ -72,3 +72,40 @@ String calculateSHA256(uint8_t *data, size_t len)
 
     return String(sha256_str);
 }
+
+String calculateSHA256(WiFiClient *stream, size_t contentLength) {
+  mbedtls_md_context_t ctx;
+  mbedtls_md_type_t md_type = MBEDTLS_MD_SHA256;
+  
+  mbedtls_md_init(&ctx);
+  mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(md_type), 0);
+  mbedtls_md_starts(&ctx);
+  
+  uint8_t buff[1024];
+  size_t bytesRead = 0;
+  
+  while (bytesRead < contentLength) {
+    size_t toRead = min((size_t)(contentLength - bytesRead), sizeof(buff));
+    size_t readBytes = stream->readBytes(buff, toRead);
+    
+    if (readBytes == 0) {
+      break;
+    }
+    
+    mbedtls_md_update(&ctx, buff, readBytes);
+    bytesRead += readBytes;
+  }
+  
+  byte shaResult[32];
+  mbedtls_md_finish(&ctx, shaResult);
+  mbedtls_md_free(&ctx);
+  
+  String result = "";
+  for (int i = 0; i < sizeof(shaResult); i++) {
+    char str[3];
+    sprintf(str, "%02x", (int)shaResult[i]);
+    result += str;
+  }
+  
+  return result;
+}

src/lib/shared.hpp

@@ -2,6 +2,7 @@
 
 #include <Adafruit_MCP23X17.h>
 #include <ArduinoJson.h>
+#include <WiFiClientSecure.h>
 #include <Preferences.h>
 #include <freertos/FreeRTOS.h>
 #include <freertos/task.h>
@@ -78,4 +79,4 @@ struct ScreenMapping {
 };
 
 String calculateSHA256(uint8_t* data, size_t len);
-
+String calculateSHA256(WiFiClient *stream, size_t contentLength);

src/lib/webserver.cpp

@@ -142,6 +142,32 @@ void onFirmwareUpdate(AsyncWebServerRequest *request)
   request->send(response);
 }
 
+void onUpdateWebUi(AsyncWebServerRequest *request)
+{
+  UpdateMessage msg = {UPDATE_WEBUI};
+  if (xQueueSend(otaQueue, &msg, 0) == pdTRUE)
+  {
+    request->send(200, "text/plain", "WebUI update triggered");
+  }
+  else
+  {
+    request->send(503, "text/plain", "Update already in progress");
+  }
+}
+
+void onUpdateFirmware(AsyncWebServerRequest *request)
+{
+  UpdateMessage msg = {UPDATE_FIRMWARE};
+  if (xQueueSend(otaQueue, &msg, 0) == pdTRUE)
+  {
+    request->send(200, "text/plain", "Firmware update triggered");
+  }
+  else
+  {
+    request->send(503, "text/plain", "Update already in progress");
+  }
+}
+
 void asyncWebuiUpdateHandler(AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final)
 {
   asyncFileUpdateHandler(request, filename, index, data, len, final, U_SPIFFS);
@@ -1045,167 +1071,6 @@ void onApiShowCurrency(AsyncWebServerRequest *request)
   request->send(404);
 }
 
-String getLatestRelease(const String &fileToDownload)
-{
-
-  //  const char *fileToDownload = "littlefs.bin";
-
-  String releaseUrl = "https://api.github.com/repos/btclock/btclock_v3/releases/latest";
-  WiFiClientSecure client;
-  client.setCACert(github_root_ca);
-  HTTPClient http;
-  http.begin(client, releaseUrl);
-  http.setUserAgent(USER_AGENT);
-
-  int httpCode = http.GET();
-
-  String downloadUrl = "";
-
-  if (httpCode > 0)
-  {
-    String payload = http.getString();
-
-    JsonDocument doc;
-    deserializeJson(doc, payload);
-
-    JsonArray assets = doc["assets"];
-
-    for (JsonObject asset : assets)
-    {
-      if (asset["name"] == fileToDownload)
-      {
-        downloadUrl = asset["browser_download_url"].as<String>();
-        break;
-      }
-    }
-    Serial.printf("Latest release URL: %s\r\n", downloadUrl.c_str());
-  }
-  return downloadUrl;
-}
-
-void onUpdateWebUi(AsyncWebServerRequest *request)
-{
-  request->send(downloadUpdateHandler(UPDATE_WEBUI));
-}
-
-void onUpdateFirmware(AsyncWebServerRequest *request)
-{
-  request->send(downloadUpdateHandler(UPDATE_FIRMWARE));
-}
-
-int downloadUpdateHandler(char updateType)
-{
-  WiFiClientSecure client;
-  client.setCACert(github_root_ca);
-  HTTPClient http;
-  http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
-
-  String latestRelease = "";
-
-  switch (updateType)
-  {
-  case UPDATE_FIRMWARE:
-    latestRelease = getLatestRelease(getFirmwareFilename());
-    break;
-  case UPDATE_WEBUI:
-    latestRelease = getLatestRelease("littlefs.bin");
-    break;
-  }
-
-  if (latestRelease.equals(""))
-  {
-    return 503;
-  }
-
-  http.begin(client, latestRelease);
-  http.setUserAgent(USER_AGENT);
-
-  int httpCode = http.GET();
-  if (httpCode == HTTP_CODE_OK)
-  {
-    int contentLength = http.getSize();
-    if (contentLength > 0)
-    {
-      uint8_t *buffer = (uint8_t *)malloc(contentLength);
-      if (buffer)
-      {
-        WiFiClient *stream = http.getStreamPtr();
-        size_t written = stream->readBytes(buffer, contentLength);
-
-        if (written == contentLength)
-        {
-          String calculated_sha256 = calculateSHA256(buffer, contentLength);
-          Serial.print("Checksum is ");
-          Serial.println(calculated_sha256);
-          if (true)
-          {
-            Serial.println("Checksum verified. Proceeding with update.");
-
-            Update.onProgress(onOTAProgress);
-
-            int updateType = U_FLASH;
-
-            switch (updateType)
-            {
-            case UPDATE_WEBUI:
-              updateType = U_SPIFFS;
-              break;
-            default:
-            {
-              updateType = U_FLASH;
-            }
-            }
-
-            if (Update.begin(contentLength, updateType))
-            {
-              Update.write(buffer, contentLength);
-              if (Update.end())
-              {
-                Serial.println("Update complete. Rebooting.");
-                ESP.restart();
-              }
-              else
-              {
-                Serial.println("Error in update process.");
-              }
-            }
-            else
-            {
-              Serial.println("Not enough space to begin OTA");
-            }
-          }
-          else
-          {
-            Serial.println("Checksum mismatch. Aborting update.");
-          }
-        }
-        else
-        {
-          Serial.println("Error downloading firmware");
-        }
-        free(buffer);
-      }
-      else
-      {
-        Serial.println("Not enough memory to allocate buffer");
-      }
-    }
-    else
-    {
-      Serial.println("Invalid content length");
-    }
-  }
-  else
-  {
-    Serial.print(httpCode);
-    Serial.println("Error on HTTP request");
-    return 503;
-  }
-  http.end();
-
-  return 200;
-}
-
 #ifdef HAS_FRONTLIGHT
 void onApiFrontlightOn(AsyncWebServerRequest *request)
 {

src/lib/webserver.hpp

@@ -29,9 +29,7 @@ void onApiSetWifiTxPower(AsyncWebServerRequest *request);
 void onUpdateWebUi(AsyncWebServerRequest *request);
 void onUpdateFirmware(AsyncWebServerRequest *request);
 
-int downloadUpdateHandler(char updateType);
 
-String getLatestRelease(const String& fileToDownload);
 
 void onApiScreenNext(AsyncWebServerRequest *request);
 void onApiScreenPrevious(AsyncWebServerRequest *request);