Convert esp32 arduino code over to nrf52840 arduino
Budget: $30 – $250 USD
Connect via ble to a ble device and send asc characters 0..9, * and # in a packet of 4 characters to program a watch. Most of the code works already with a small i2c qwiic oled and i2c keypad. Just need to substitute the ble connection for send/receive. The board being used is the sparkfun pro nrf52840 mini: https://learn.sparkfun.com/tutorials/sparkfun-pro-nrf52840-mini-hookup-guide?_ga=2.148235703.1460924252.1630241216-1814219539.1630241216