- [How to verify the SD card image after download?](#how-to-verify-the-sd-card-image-after-download)
- [What changed on every upgrade?](#what-changed-on-every-upgrade)
- [How do I upgrade my RaspiBlitz?](#how-do-i-upgrade-my-raspiblitz)
- [Why do I need to re-burn my SD card for an update?](#why-do-i-need-to-re-burn-my-sd-card-for-an-update)
- [How can I update LND or bitcoind even before the next RaspiBlitz update?](#how-can-i-update-lnd-or-bitcoind-even-before-the-next-raspiblitz-update)
- [SSH](#ssh)
- [What to do when on SSH I see "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!"](#what-to-do-when-on-ssh-i-see-warning-remote-host-identification-has-changed)
- [How do I unplug/shutdown safely without SSH](#how-do-i-unplugshutdown-safely-without-ssh)
- [I cannot connect via SSH to my RaspiBlitz. What do I do?](#i-cannot-connect-via-ssh-to-my-raspiblitz-what-do-i-do)
- [How to SSH over Tor?](#how-to-ssh-over-tor)
- [How to setup port-forwarding with a SSH tunnel?](#how-to-setup-port-forwarding-with-a-ssh-tunnel)
- [How do I setup just a port-forwarding user on my public server?](#how-do-i-setup-just-a-port-forwarding-user-on-my-public-server)
- [Display](#display)
- [Can I flip the screen?](#can-i-flip-the-screen)
- [How to fix my upside down LCD after update?](#how-to-fix-my-upside-down-lcd-after-update)
- [Can I run the RaspiBlitz without a display/LCD?](#can-i-run-the-raspiblitz-without-a-displaylcd)
- [How do I find the IP address when running without a display?](#how-do-i-find-the-ip-address-when-running-without-a-display)
- [Debug](#debug)
- [I have the full blockchain on another storage. How do I copy it to the RaspiBlitz?](#i-have-the-full-blockchain-on-another-storage-how-do-i-copy-it-to-the-raspiblitz)
- [How do I generate a Debug Report?](#how-do-i-generate-a-debug-report)
- [Why is my "final sync" taking so long?](#why-is-my-final-sync-taking-so-long)
- [How do I backup my Lightning Node?](#how-do-i-backup-my-lightning-node)
- [1) Securing your On-Chain- and Channel-Funds during Operation](#and-channel-funds-during-operation)
- [2) Making a complete LND data backup](#2-making-a-complete-lnd-data-backup)
- [How can I recover my coins from a failing RaspiBlitz?](#how-can-i-recover-my-coins-from-a-failing-raspiblitz)
- [1) Recover LND data](#1-recover-lnd-data)
- [2) Recover from Wallet Seed](#2-recover-from-wallet-seed)
- [How do I move funds & channels from RaspiBlitz to LND Lightning Desktop App?](#how-do-i-move-funds--channels-from-raspiblitz-to-lnd-lightning-desktop-app)
- [How do I change the Name/Alias of my lightning node](#how-do-i-change-the-namealias-of-my-lightning-node)
- [How do I change the public port LND/Lightning node is running on?](#how-do-i-change-the-public-port-lndlightning-node-is-running-on)
- [How do I solve a "signature mismatch after caveat verification" error?](#how-do-i-solve-a-signature-mismatch-after-caveat-verification-error)
- [Why is my node not routing?](#why-is-my-node-not-routing)
- [When using Auto-Unlock, how much security do I lose?](#when-using-auto-unlock-how-much-security-do-i-lose)
- [I connected my HDD but it still says 'Connect HDD' on the display?](#i-connected-my-hdd-but-it-still-says-connect-hdd-on-the-display)
- [How do I shrink the QR code for connecting my Shango/Zap/Zeus mobile phone?](#how-do-i-shrink-the-qr-code-for-connecting-my-shangozapzeus-mobile-phone)
- [Why is my bitcoin IP on the display red?](#why-is-my-bitcoin-ip-on-the-display-red)
- [Why is my node address on the display red?](#why-is-my-node-address-on-the-display-red)
- [Why is my node address on the display yellow (not green)?](#why-is-my-node-address-on-the-display-yellow-not-green)
- [How do I fix a displayed Error in my Config?](#how-do-i-fix-a-displayed-error-in-my-config)
- [Can I run the RaspiBlitz as Backend for BTCPayServer?](#can-i-run-the-raspiblitz-as-backend-for-btcpayserver)
- [I don't have a LAN port on my Laptop - how do I connect to my RaspiBlitz?](#how-do-i-connect-to-my-raspiblitz)
- [Is it possible to connect the Blitz over Wifi instead of using a LAN cable?](#is-it-possible-to-connect-the-blitz-over-wifi-instead-of-using-a-lan-cable)
- [Can I directly connect the RaspiBlitz to my laptop?](#can-i-directly-connect-the-raspiblitz-to-my-laptop)
- [How to attach the RaspberryPi to the HDD?](#how-to-attach-the-raspberrypi-to-the-hdd)
- [What other case options do I have?](#what-other-case-options-do-i-have)
- [Are those "Under-Voltage detected" warnings a problem?](#are-those-under-voltage-detected-warnings-a-problem)
- [How do I return to the menu after exiting to the command line](#how-do-i-return-to-the-menu-after-exiting-to-the-command-line)
- [How do I setup fresh/clean/reset and without going into recovery mode?](#how-do-i-setup-freshcleanreset-and-without-going-into-recovery-mode)
- [My blockchain data is corrupted - what can I do?](#what-can-i-do)
- [I have two RaspiBlitz in my network - can they both be public?](#can-they-both-be-public)
- [How can I enforce UASP mode for my SSD controller?](#how-can-i-enforce-uasp-mode-for-my-ssd-controller)
- [I am facing maintenance/emergency mode on boot. How do I fix it?](#i-am-facing-maintenanceemergency-mode-on-boot-how-do-i-fix-it)
- [Extras](#extras)
- [How do I connect a UPS to the RaspiBlitz?](#how-do-i-connect-a-ups-to-the-raspiblitz)
- [Can I run my RaspiBlitz on Solar Energy?](#can-i-run-my-raspiblitz-on-solar-energy)
- [How to use the Let's Encrypt client](#how-to-use-the-lets-encrypt-client)
There are two methods, verify the hash (proves integrity) or the signature (proves integrity and authenticity)
You can do a quick check to verify that the sha256 hash of the file you downloaded is the same as the sha256 hash mentioned below the download link, or use the torrent download which will also check the file for a checksum after download.
Next, download the "signature file" for the SD card image. It's the same download link as for the image file - just added a `.sig` at the end. You should also always find the download link for the signature file in the README right next to the image download link.
If you now have all the three elements needed - the imported public key, the image signature and the image file itself - you can verify the download with:
As a result you should see a "good signature" message with a main fingerprint the same as you can find on the [keybase.io/rootzoll](https://keybase.io/rootzoll) that is ending on `1C73 060C 7C17 6461`. You should also see the sub-key fingerprint ending on `AA9D D1B5 CC56 47DA`, that is used at the moment to sign the sd card image. If those fingerprints shown correctly, the SD card image you downloaded is an original RaspiBlitz release.
*You can ignore any warning about the key being 'not a trusted signature' or untrusted .. as long you see "good signature" and the correct main & sub fingerprints the download is valid.*
I know it would be nicer to run just an update script and be ready to go. But then the scripts would need to be written in a much more complex way to be able to work with any versions of LND and Bitcoind (they are already complex enough with all the edge cases) and testing would become even more time consuming than it is now. That's not something that a single developer can deliver.
For some, it might be a pain point to make an update by re-burning a new SD card - especially if you added your own scripts or made changes to the system - but that's by design. It's a way to enforce a "clean state" with every update - the same state that I tested and developed the scripts with. The reason for that pain: I simply cannot write and support scripts that run on every modified system forever - that's simply too much work.
With the SD card update mechanism I reduce complexity, I deliver a "clean state" OS, LND/Bitcoind and the scripts tightly bundled together exactly in the dependency/combination like I tested them and it's much easier to reproduce bug reports and give support that way.
Of course, people should modify the system, add own scripts, etc ... but if you want to also have the benefit of the updates of the RaspiBlitz, you have two ways to do it:
2. Make your changes so that they survive an SD card update easily - put all your scripts and extra data onto the HDD, AND document for yourself how to activate them again after an update. The file `/mnt/hdd/app-data/custom-installs.sh` runs with sudo rights after an update/recovery from a fresh SD card. This is the place to put all the install commands, cronjobs or editing of system configs for your personal modifications of RaspiBlitz.
*BTW there is a beneficial side effect when updating with a new SD card: You also get rid of any malware or system bloat that happened in the past. You start with a fresh system :)*
### What to do when on SSH I see "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!"
This means that he public SSH key of the RaspiBlitz has changed to the one you logged in with the last time under that IP.
It's OK when happening during an update - when you changed the SD card image. If it's really happening out of the blue - check your local network setup for a problem. Maybe the local IP of your RaspiBlitz changed? Is there a second RaspiBlitz connected? It's a security warning, so at least take some time to check if anything is strange. But also don't immediately panic - when it's in your local network, normally it's some network thing - not an intruder.
To fix this and to be able to login with SSH again, you have to remove the old public key for that IP from your local client computer. Just run the following command (with the replaced IP of your RaspiBlitz): `ssh-keygen -R IP-OF-YOUR-RASPIBLITZ` or remove the line for this IP manually from the known_hosts file (see the path to the file in the warning message).
After that, you should be able to login with SSH again.
### How do I unplug/shutdown safely without SSH
Just removing power from the RaspiBlitz can lead to data corruption if the HDD is right in the middle of a writing process. The safest way is always to SSH into the RaspiBlitz and use the "POWER OFF" option in the main menu.
But if cannot login with SSH and you need to power off at least remove the LAN cable (network connection)first for sometime (around 10-30 secs - until you can see no more blinking lights on the HDD) and then remove the power cable. This should minimize the risk if data corruption in this situations.
### I cannot connect via SSH to my RaspiBlitz. What do I do?
- Check the command again with how it shows on the display - do you have it typed in correctly?
- Replace `ssh` with `sudo ssh` and try it (laptop admin password might be required).
If that doesn't work, try to ping the IP of the RaspiBlitz with `ping [IP-of-RaspiBlitz]`. If you get no response on the ping requests and the device is not reachable, try this check list:
- Make sure that your RaspiBlitz and your laptop are really on the same local network
- Check if you have a VPN running on your laptop - some VPNs block local network
- Some Routers have `IP Isolation` switched on - not allowing two devices to connect
If you've checked those and SSH is still not working: Join the conversation on [GitHub Issue #420](https://github.com/rootzoll/raspiblitz/issues/420).
### How to SSH over Tor?
SSH is already encrypted, why would I want to use it with Tor?
* Remote access when away from LAN.
* Anonymized access - Someone sniffing the traffic don't know where the server you are establishing a connection is, not the server side knows where the client is.
But first you need to make sure that the public server you are using is supporting SSH reverse-tunneling and authentication by public authorized key. Check the `/etc/ssh/sshd_config` on the public server. It should contain the following settings:
```
RSAAuthentication yes
PubkeyAuthentication yes
GatewayPorts yes
AllowTcpForwarding yes
ClientAliveInterval 60
ClientAliveCountMax 2
```
*Last two parameters were added as used in the ssh tunnel demo at #GPN19 https://media.ccc.de/v/gpn19-76-einen-server-daheim-ohne-ffentliche-ipv4-adresse#t=911*
You can add those at the end of the file, save and reboot.
On the RaspiBlitz you can then setup for example to forward the gRPC port 10009 (internal port) to the port 20009 on the public server (external port) with the user = `test` and server address = `raspiblitz.com` with the following command:
`/home/admin/config.scripts/internet.sshtunnel.py on test@raspiblitz.com "10009<20009"`
You can even set multiple port forwardings like with:
`/home/admin/config.scripts/internet.sshtunnel.py on test@raspiblitz.com "10009<20009" "8080<9090"`
Please be aware that after you set such a port forwarding you will need to set the domain of the public server as a `DynamicDNS` name (leave update url empty) and then connect mobile wallets fresh, or export the macaroons/certs again. When connecting the mobile wallets you may need to adjust ports manually after QR code scan. And if you SSH tunnel the LND node port `9735` you may also need to set the custom LND port script and maybe also a manual set of the domain in the LND service would be needed. This all is very experimental at the moment ... better integration will come in the future.
To switch this SSH tunneling off again use:
`/home/admin/config.scripts/internet.sshtunnel.py off` and also deactivate the DynamicDNS again.
To check if a tunnel is running on the tunneling server check: `netstat -tulpn`
### How do I setup just a port-forwarding user on my public server?
Make sure the `/etc/ssh/sshd_config` has the following lines at the end:
```
RSAAuthentication yes
PubkeyAuthentication yes
GatewayPorts yes
AllowTcpForwarding yes
AuthorizedKeysFile /etc/ssh/authorized_keys/%u
```
The last one stores all authorized_keys in one directory with a file per user. See https://serverfault.com/questions/313465/is-a-central-location-for-authorized-keys-a-good-idea#424659 To prepare this run:
As a result you should see a "good signature" message with a main fingerprint the same as you can find on the [keybase.io/rootzoll](https://keybase.io/rootzoll) that is ending on `1C73 060C 7C17 6461` the sub fingerprint should end on `A2D7 AA9D D1B5 CC56 47DA`. If that fingerprint is correct, the SD card image you downloaded is a original release RaspiBlitz.
- shutdown the RaspiBlitz - if you dont have touchscreen activated, disconnect LAN cable, wait until HDD/SSD activity slows down (no constant blinking) and then cut the power
- take out the SD card and connect it to your laptop - it should appear as a `boot` drive
- in the root directory of that `boot` drive create a file called `ssh.reset`
- that file can be empty or just copy another file on that drive and rename it ()
- eject the drive from your laptop safely
- put SD card back into the RaspiBlitz (also make sure LAN cable is connected again)
- power up - the RaspiBlitz should boot up & reboot again
- then try again to SSH login
If you see a "REMOTE HOST IDENTIFICATION HAS CHANGED!" warning on login, that's what we wanted - the SSH cert of your RaspiBlitz changed - thats good. We just need to remove the old one from our laptop first - on OSX you can use `rm ~/.ssh/known_hosts` (deletes all cached server certs) or remove the line with your RaspiBlitz IP manually from the `~/.ssh/known_hosts` file with a text editor.
## Display
### Can I flip the screen?
There is now an option under `SETTINGS` to rotate the screen.
To do it manually: For the default 3.5" LCD you need to edit the /boot/config.txt. Run `sudo nano /boot/config.txt`
Look for the line `dtoverlay=tft35a:rotate=270` towards the end. To flip the screen with 180 degrees change the line to `dtoverlay=tft35a:rotate=90` and reboot with `sudo reboot`. Reference: https://github.com/goodtft/LCD-show/issues/34
### How to fix my upside down LCD after update?
Some displays have a different orientation. To fix this activate/deactivate the LCD-ROTATION option in the MAINMENU > SERVICES and let it reboot. You might need to do this up to 3 times until your display works correctly.
### Can I run the RaspiBlitz without a display/LCD?
The display is one of the nice features of the RaspiBlitz but it can run without it. Maybe not all the add-on features can be used to the full extent, but you can get started without the LCD and if you wish, plug it on later.
If you want to use the HDMI output you can place a file called `hdmi` on the `boot` section of the RaspiBlitz sd card ... just connect the sd card to your laptop, create that file and then boot it up in the RaspberryPi.
If you are already logged in you can use on the console the commands:
-`hdmi` --> switch to HDMI
-`lcd` --> switch to LCD
### How do I find the IP address when running without a display?
If you can login into your local internet router it should show you the IP address assigned to the RaspberryPi.
Another way is to use [Angry IP Scanner](https://angryip.org/) to find the IP address.
You can also put an empty file just called `hdmi` (without any ending) onto the sd card when connected to your laptop and then start it up on the RaspberryPi. This will activate the HDMI port and if you connect a HDMI monitor to the RaspberryPi it will show you the RaspiBlitz status screen containing the local IP address.
## Debug
### I have the full blockchain on another storage. How do I copy it to the RaspiBlitz?
Copying a already synced blockchain from another storage (e.g. your Laptop or external hard drive) can be a quick way to get the RaspiBlitz started or replacing a corrupted blockchain with a fresh one. Also that way you have synced and verified the blockchain yourself, and are not trusting the RaspiBlitz Torrent downloads (Don't trust, verify).
But we don't copy the data via USB to the device, because the HDD needs to be formatted in EXT4 and that is usually not read/writable by Windows or Mac computers. So I will explain a way to copy the data through your local network. This should work from Windows, Mac, Linux and even from another already synced RaspiBlitz.
Both computers (your RaspberryPi and the other computer with the full blockchain) need to be connected to the same local network. Make sure that bitcoind/bitcoin-qt is stopped on the computer containing the blockchain.
If your blockchain source is another RaspiBlitz v1.5 or higher - go to `REPAIR` > `COPY-SOURCE`.
If your RaspiBlitz is below v1.5 then on the terminal `sudo systemctl stop bitcoind` and then go to the directory where the blockchain data is with `cd /mnt/hdd/bitcoin` - when the copy/transfer is done later reboot a RaspiBlitz source with `sudo shutdown -r now`.
If everything described above is in order, start the setup of the new RaspiBlitz with a fresh SD card (like explained in the README) - it's OK that there is no blockchain data on your HDD yet - just follow the setup. When you get to the setup-point `Getting the Blockchain` choose the COPY option. Starting from version 1.0 of the RaspiBlitz this will give you further detailed instructions how to transfer the blockchain data onto your RaspiBlitz. In short: On your computer with the blockchain data source you will execute SCP commands that will copy the data over your local network to your RaspiBlitz.
Once you finished all the transfers, the Raspiblitz will make a quick-check on the data - but that will not guarantee that everything in detail was OK with the transfer. Check further FAQ answers if you get stuck or see a final sync with a value below 90%.
If your RaspiBlitz is not working correctly and you like to get help from the community, it's good to provide more debug information, so others can better diagnose your problem - please follow the following steps to generate a debug report:
First of all if you see a final sync over 90% and you can see from time to time small increase - you should be OK ... this can take a looong time to catch up with the network. Only in the case that you actively choose the `SYNC` option in the `Getting the Blockchain` is a final sync under 90% OK. If you did a torrent or a copy from another computer and you are seeing under 90% something went wrong, and the setup process is ignoring your prepared Blockchain and doing a full sync - which can almost take forever on a raspberryPi.
If something is wrong (like mentioned above) then try again from the beginning. You need to reset your HDD for a fresh start: SSH in as admin user. Abort the final sync info with CTRL+c to get to the terminal. Then run `sudo /home/admin/XXcleanHDD.sh -all` and follow the script to delete all data in HDD. When finished power down with `sudo shutdown now`. Then make a fresh SD card from image and this time try another option to get the blockchain. If you run into trouble the second time, please report an issue on GitHub.
This is best done by auto backing-up the 'channel.backup' file to a remote location. But it just secures the funds you have in your on-chain wallet or in your channels. On recovery the channels will get closed. For details on how to setup see the README:
This backups all your LND data - including all open channels. But it's just intended to use when you move your LND data between computers, during update situations, or in rescue recoveries, because replaying out-dated backups can lead to the loss of all channel funds.
On a RaspiBlitz you have coins in your on-chain wallet (bitcoin wallet) and also coins in lightning channels. First we will try to recover all of them while trying to keep your channels open with "Recover LND data". If that is not possible you can fall back to the second option "Recover from Wallet Seed".
The best chance to recover all your LND data/channels is when you still can SSH into the RaspiBlitz and the HDD is still usable/reachable (mounted) - even if it shows some errors. If this is not possible anymore you should skip to the second option "Recover from Wallet Seed" or try to recover the LND data from the HDD (directory `lnd`) from another computer.
If you still can SSH in and HDD is readable, we can try to rescue/export your LND data (funds and channels) from a RaspiBlitz to then be able to restore it back to a fresh one. For this you can use the following procedure ...
This will create a lnd-rescue file (ends on gz.tar) that contains all the data from the LND. The script offers you a command to transfer the lnd-rescue file to your laptop. If the transfer was successful you can now setup a fresh RaspiBlitz. Do all the setup until you have a clean new Lightning node running - just without any funding or channels.
This script will offer you a way to transfer the lnd-rescue file from your laptop to the new RaspiBlitz and will restore the old data. LND then gets restarted for you, and after some time it should show you the status screen again with your old funds and channels.
**Be aware that if backup is some hours old, channels could have been closed by the other party and it may take some time until you see funds back on-chain. If backup is somewhat older then 1 day also the channel counter-parties may have used your offline time to cheat you with an old state. And if your backup was not the latest state it could also be happening that you are posting an old channel state (seen as cheating) and funds of that channel get forfeited as punishment. So again .. this backup method can be risky, use with caution. While it's recommended to try in recover and rescue situations - it's not for regular backups.**
Remember those 24 words you were writing down during the setup? That's your "cipher seed" - These words are very important for recovering your wallet. If you don't have them anymore: go back to option "Recover LND data" (see above) and check all possible ways to recover data from the HDD. If you still have the word seed: good, but read the following carefully:
With the word seed you can recover the on-chain funds that LND was managing for you - but it does not contain all the details about the channels you have open - it's mostly the key to your funding wallet. If you were able to close all channels or never opened any, then you should be safe: The best results to recover on-chain funds from wallet seeds have been reported from people installing the Lightning Labs App on laptop and then using the wallet seed (and same wallet passwords): https://github.com/lightninglabs/lightning-app/releases. Other people were succesful in this process using the Zap Desktop wallet (OSX, Win, Linux): https://zap.jackmallers.com/download
If you had open channels it would be best to check if you have also the `channel.backup` file (Static-Channel-Backup feature) that is available since LND 0.6 (RaspiBlitz v1.2) and use it in the process below ... for more details on the `channel.backup` file see [README.md on backups](README.md#backup-for-on-chain---channel-funds).
Then give LND some time to re-scan the blockchain. In the end you will have restored your funding wallet. You maybe need to wait for your old channel counterparts to force close the old channels until you see the coins displayed again.
*Important: If you see a zero balance for on-chain funds after restoring from seed ... see details discussed [here](https://github.com/rootzoll/raspiblitz/issues/278) - you might try setup fresh this time with bigger look-ahead number.*
Before you start - download a LND-data-rescue file from your RaspiBlitz to your laptop `main menu -> UPDATE -> Update Anyway -> Start Update -> Download Backup -> FOLLOW INSTRUCTIONS and press Enter when ready with download -> START UPDATE`. Now your RaspiBlitz will power down.
Now install the LND Lightning Desktop App for your OS: https://github.com/lightninglabs/lightning-app/releases
Then start the App and create a new wallet - it's a throw-away wallet (will be deleted afterwards with no funds) - so you don't need to keep seeds safe. To get easily through the setup just make a photo of the seed with your mobile. If you get asked for funding - just click "done" until you reach the basic wallet screen. Then close the LND Desktop App.
Now unpack the lnd-rescue you made before and copy all the data from the `mnt/hdd/lnd` directory (including sub directories) into the LND-Path lnd directory. Delete the "lnd.conf" file.
There is a experimental script you can call from the terminal that will make all changes for you ... see details here: https://github.com/rootzoll/raspiblitz/issues/100#issuecomment-466722712
If you get this error by LND it means that something is wrong with the macaroons being used to communicate with LND .. see: https://github.com/lightningnetwork/lnd/blob/master/docs/macaroons.md
* If you get it in a mobile wallet, then redo the connection with the RaspiBlitz to get fresh macaroons.
* If you get this from RTL or from the scripts of the SSH menus of the RaspiBlitz, then go to "EXPORT Macacroons and TLS.cert" in SSH main menu and choose the the "RESET Macaroons & TLS" option.
Also make sure to check again on your power supply - it needs to deliver equal or more then 3A and should deliver a stable current. If you think your HDD is degrading - maybe this is a good time to replace it. See for details the FAQ question: [How can I recover my coins from a failing RaspiBlitz?](FAQ.md#how-can-i-recover-my-coins-from-a-failing-raspiblitz)
### Why is my node not routing?
1. You don't have inbound liquidity
2. Low uptime
3. Capital is committed to competitive destinations
4. Capital committed to destinations no one wants to send to
5. Fees are too high
6. Your inbound liquidity doesn't have good inbound liquidity itself
### When using Auto-Unlock, how much security do I lose?
The idea of the "wallet lock" in general, is that your private key / seed / wallet is stored in a encrypted way on your HDD. On every restart, you have to input the password once manually (unlock your wallet), so that the LND can read and write to the encrypted wallet again. This improves your security if your RaspiBlitz gets stolen or taken away - it loses power and then your wallet is safe - the attacker cannot access your wallet.
When you activate the "Auto-Unlock" feature of the RaspiBlitz, the password of the wallet gets stored on the RaspiBlitz. So if an attacker steals the RaspiBlitz physically, it's now possible for them to find the password and unlock the wallet.
Your HDD may have no partitions yet. SSH into the RaspiBlitz as admin (see command and password on display) and you should be offered the option to create a partition. If this is not the case:
Make the fonts smaller until the QR code fits into your (fullscreen) terminal. In OSX use `CMD` + `-` key. In LINUX use `CTRL`+ `-` key. On WINDOWS Putty go into the settings and change the font size: https://globedrill.com/change-font-size-putty
The bitcoin IP is red when the RaspiBlitz detects that it cannot reach the port of bitcoin node from the outside. This means the bitcoin node can peer with other bitcoin nodes, but other bitcoin nodes cannot initiate a peering with you. Don't worry, you don't need a publicly reachable bitcoin node to run a (public) lightning node. If you want to change this however, you need to forward port 8333 on your router to the RaspiBlitz. How to do this is different on every router.
Some routers support a feature called UPnP where devices can automatically request a forwarding to be publicly reachable. By turning on `BTC UPnP` in the main menu `SERVICES` section, you can try if your router supports this feature.
The node address is red when the RaspiBlitz detects that it cannot reach the port of the LND node from the outside - when the device is behind a NAT or firewall of the router. Your node is not publicly reachable. This means you can peer+openChannel with other public nodes, but other nodes cannot peer+openChannel with you. To change this you need to forward port 9735 on your router to the RaspiBlitz. How to do this is different on every router.
Some routers support a feature called UPnP where devices can automatically request a forwarding to be publicly reachable. By turning on `LND UPnP` in the main menu `SERVICES` section, you can try if your router supports this feature.
Also the self-testing of the RaspiBlitz to see if the port is forwarded or not might not work if your router is not supporting [Hairpinning](https://en.wikipedia.org/wiki/Hairpinning).
Yellow is OK. The RaspiBlitz can detect that it can reach a service on the port 9735 of your public IP - this is in most cases the LND of your RaspiBlitz. But the RaspiBlitz cannot 100% for sure detect that this is its own LND service on that port - that's why it's just yellow, not green.
BTCPay Server is a solution to be your own payment processor to accept Lightning Payments for your online store: https://github.com/btcpayserver/btcpayserver
Thanks to @RobEdb (ask on twitter for more details) for running his demo store with RaspiBlitz: https://store.edberg.eu - buy a picture of [him and Andreas](https://store.edberg.eu/produkt/jag-andreas/) :)
You don't need a LAN port on your laptop as long as you can connect over WLAN to the same LAN router/switch the RaspiBlitz is connected to .. and you are on the same local network.
A LAN cable is recommended because it reduces a possible source of error on the network connection side. But how to setup WLAN when you don't have a LAN-Router/Switch available see here:
If you have a LAN port on your laptop - or you have a USB-LAN adapter, you can connect the RaspiBlitz directly (without a router/switch) to your laptop and share the WIFI internet connection. You can follow this [guide for OSX](https://medium.com/@tzhenghao/how-to-ssh-into-your-raspberry-pi-with-a-mac-and-ethernet-cable-636a197d055).
You can put the heatsink-case (top-part mentioned in the shopping lists) into a customized 3D printed case for the RaspiBlitz called "Lightning Shell" - great work by @CryptoCloaks
When your USB power adapter for the RaspiBlitz delivers too low of a power level, those messages with "Under-Voltage detected" (under-voltage) are shown on the display. This can lead to data loss/corruption on the HDD. If you see this just one or two times it's not OK, but can be in a tolerant window. Nevertheless it is important to make sure that your USB power adapter can deliver at least 3A (big and stable is good). If you still see those warnings maybe get a second USB Power adapter just for the HDD, and power the HDD through a Y-Cable - see https://en.wikipedia.org/wiki/Y-cable#USB or put a USB Hub with extra power between the Raspberry and the HDD.
When you put in a SD card with a new/clean RaspiBlitz image the RaspiBlitz will go into recovery mode because it detects the old data on your HDD and assumes you just want to continue to work with this data.
But there might be cases where you want to start a totally fresh/clean RaspiBlitz from the beginning. To do so you need to delete the old data from the HDD. Choose the option `RESET-ALL` under `REPAIR` to delete all data and start fresh.
You can backup your channel and wallet data, make a complete fresh RaspiBlitz and after that is setup, you replace the LND data with your old data. Also make sure to check again on your power supply - it needs to deliver equal or more then 3A, and should deliver a stable current. If you think your HDD or SD card is degrading - maybe this is a good time to replace it. See for details the FAQ question: [How can I recover my coins from a failing RaspiBlitz?](FAQ.md#how-can-i-recover-my-coins-from-a-failing-raspiblitz)*
Yes but you need to change the port number (for example to 9736) on at least one of your RaspiBlitzes - see how to change a port below. Then you can forward both ports from your home internet router to the matching RaspiBlitzes.
By default just tested & selected SSD encasings/controller are running enabled with UASP in RaspiBlitz. UASP brings a speed up for the SSD but also if not well supported by the SSD encasing/controller can lead to system halts. If you know for sure that your SSD encasing/controller is supporting UASP fully you can place a file called `uasp.force` on the sd card boot section after flashing the image with your laptop. See details or report errors on issue [#2488](https://github.com/rootzoll/raspiblitz/issues/2488)
### I am facing maintenance/emergency mode on boot. How do I fix it?
This behavior is caused by either the software that flashes the RaspiBlitz image onto the sd card, or by a faulty sd-card. The only solution is to try switching the software/computer you use for flashing and/or trying another sd card.
A UPS (Uninterruptible Power Supply) is used to protect the RaspiBlitz against power outages. Normally you put it just between your normal power outlet and your RaspiBlitz and you are set. But some UPS offer a way to communicate with devices. This can be very useful for example if on a longer power outage the battery of the UPS runs low the RaspiBlitz could detect this and power down in a clean way - instead of a sudden stop that risks data loss or corruption.
There is an experimental script to connect the RaspiBlitz to a UPS over USB cable build by APC - the Model tested with was [APC Back-UPS BX - BX700U-GR](https://www.amazon.de/APC-Back-UPS-Unterbrechungsfreie-Stromversorgung-BX700U-GR/dp/B00T7BYRCK) but it should work with every APC model offering a USB port.
More details in his book ["A-Z of Building your own Full Bitcoin Lightning Node: A hand Book for Enthusiasts"](https://blockspace.shop/products/a-z-of-building-your-own-full-bitcoin-lightning-node-a-hand-book-for-enthusiasts)
With the 24 word list given you by LND upon wallet creation you can recover your private key. You should write it down and store it at a safe place. Bear in mind that *this 24 word mnemonic seed is not based on the BIP 39* and therefore cannot be recovered using a Bitcoin wallet.
For more background on the LND mnemonic seed [read this article](https://github.com/lightningnetwork/lnd/blob/master/docs/recovery.md#recovering-funds-from-lnd-funds-are-safu).
This will run by default in the display number '1'. If you want to specify another number, run this (change *\<display-number\>* to whatever you prefer):
From the VNC client (e.g. your PC, laptop), connect to the IP that the previous command has displayed in the screen (I covered it in pink in the screenshot). If everything is alright, you can see the display from the VNC client now.
BTRFS comes with build in RAID features - that means that data can be stored on two physical drives at the same time and if one is failing the other one can be used to heal the other one or its replacement.
For the Raspiblitz this means that you can connect an additional 32GB USB3 Thumb Drive (under 10 USD) and have it running in a RAID with your HDD/SSD - keeping your LND channel data and all other important data of your RaspiBlitz double-safe.
BTRFS comes with a build in snapshot feature - that means that your RaspiBlitz can make every day a backup of the blockchain data and if a blockchain corruption occurs (exmaple thru a power outage) there is no need to sync the complete chain again. Just switch back to the last backup state and quickly sync up from there. On BTRFS such backups can be done as snapshots that dont need much more space on the drive and are quickly done - no need to buy a bigger SSD or wait for copying over 200GB.
- When you start a fresh setup just connect a 32GB Thumb Drive on the second USB3 port from the beginning and you should be asked during HDD setup if you want to try out BTRFS and gave the Thumb Drive as RAID1.
- If you have a existing RaspiBlitz and you want to switch to BTRFS then you need to export a Migration File (MAINMENU > REPAIR > MIGRATION) an then format your HDD/SSD clean. When you import a Migration File during a fresh Setup (see above) you will get the option to format the HDD/SSD with BTRFS.
