The Quickening is the cheapest fully functional bitcoin point of sale terminal on the planet.
- ESP32 NODEMCU-32S
- 1.8 TFT 160/128
- 4x4 adhesive matrix keypad
- x8 female-female jumper cables
Install the Arduino IDE,
https://www.arduino.cc/en/Main/Software
Install the ESP32 hardware,
https://github.com/espressif/arduino-esp32#installation-instructions
From "Manage Libraries" install,
- Keypad
- ArduinoJson
- TFT_eSPI
- QRCode