Bitcoin Switch with Gsm and OLED Display

Adoption of the Bitcoin Switch with the T-Call Go V1.4 which has a GSM800 Module and a OLED display.

This repo is based on the original source of bitcoinSwitch of @benarc!

This Commit was used for developing.

Hardware

You will find the sources for https://www.waveshare.com/1.5inch-RGB-OLED-Module.htm too.

Wireing


2 Portal Pin

### TFT ### 
<<<<<<< Updated upstream
5V   (violet)  3.3V/5V Power input
GND  (white)   GND

14   (green)   DIN / MOSI Data input
18   (orange)  SCL Clock input
33   (yellow)  DC Data/command signal selection, low level indicates command, high level indicates data
32   (blue)    CS Chip select, active low (because 17 was not found)
25   (brown)   RST (because 5 is used for the modem)
=======
VIOLET  5V   3.3V/5V Power input
WHITE   GND  G ND

GREEN   14   DIN / MOSI Data input
ORANGE  18   SCL Clock input
YELLOW  32   CS Chip select, active low (because 17 was not found)
BLUE    33   DC Data/command signal selection, low level indicates command, high level indicates data
BROWN   25   RST (because 5 is used for the modem)
GRAY    N.C.

(Colorcoding of this TFT Display)
>>>>>>> Stashed changes

### Relay ### 
12   IN of Relay

FYI: GPI: GPIO34-39 can only be set as input mode and do not have software-enabled pullup or pulldown functions.

Configuration

I needed to extend the current bitcoinSwitch config for the LNURL on the display and the gsm network. See elements.json.example.

Dev Notes

QR Code Version 9 is neede

The library is broken - at least how to set the version I needed to change directly the .c files (look a version7 and copy and paste the selection part (first 3 lines) to version9 file)

Portal Pin change to 2

Pin 4 is used by the modem. Changed Portal PIN to 2.

#define PORTAL_PIN 2

Signal Strength

int16_t strength = modem.getSignalQuality()

99 not known or not detectable
2 ... 30 --> Check Table here: https://m2msupport.net/m2msupport/atcsq-signal-quality/

Create Images

Use https://javl.github.io/image2cpp/
Option: Arduino Code, Single Bitmap
Option: Horizontal 2 Bytes

Ghost interferance on relay pin

I am using a relay on pin12 and it was triggered, when the moden is dooing something. I needed to set the pin on output in the beginning of the code. (Not wait until the first payment is recived).

Tip us

If you like this project, please adapt the landingpage to your local stores, that accept bitcoin or even extend it. Why not send some tip love?

Satoshi-Engineering/bitcoinSwitch-gsm-update