When I created this project page, I had no LoRa module at hand . I still don't, but I had to get started. I checked my stash of unused components, and found a pair of NRF24L01.
An RF transceiver, that is not LoRa.
I played around with its transmission and reception of messages. I used Serial via the Android Arduino application serial console on both phones. It worked, not well enough, but enough to prove a point.
My Android development skill is close to non-existent, and I hope to use Thunkable to make an app that interfaces with the ESP32 Bluetooth and sends and receive message from the hardware.
I began making the schematic diagram early this morning. The device was to have
- A small screen to display basic information like battery level, number of connections etc.
- A rechargeable battery
I used 0805 components and the ESP32 Pico D4. The PCB layout is not complete and I thought I'd share the PDF of the schematic.
This is the progress so far.