====== Dani's Node ======

A LoRa radio node supplied by Dani. Consists of two boards which can be soldered together directly: An nRF52840 board, in nice!nano / promicro format, and an SX1262 board with two buttons.

  * https://github.com/joric/nrfmicro/wiki/Alternatives
  * https://github.com/NomDeTom/NiceRa/tree/main/Sidekick%20Breakout%20V2.1

===== Flashing =====

Flashing can be done by dragging a ''.uf2'' file to the drive that appears on USB connection. However, this did not work for me initially. Bootloader was version ''0.6.0''. I upgraded this to ''0.9.2'' and then the latest meshtastic image was recognised and programmed.

==== Bootloader ====

Bootloader can be updated with serial dfu tool from adafruit, or by copying these files to the USB drive in this order:

  * https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases/download/0.9.2/nice_nano_bootloader-0.9.2_s140_6.1.1.hex
  * https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases/download/0.9.2/update-nice_nano_bootloader-0.9.2_nosd.uf2

===== Meshtastic =====

Firmware image is called: "NRF52 Pro-micro DIY", available on the github releases page.

===== Power =====

I measured when running meshtastic 2.6.11 from supplied image, LEDs disabled, not transmitting.

I think I used a different nRF board from the one Dani supplied. They look very similar, but this one says C3 on the aerial chip.

Supplied on battery terminals:
  * 3.32V: 8.7mA
  * 4.20V: 7.9mA

3.3V to 3.3V pin on board: 8.6 mA.

5V supplied on USB port:
9.55mA or 10.05mA, with bluetooth connected or not respectively. Blue LED flashes rapidly.

3.3V on USB port:
9.49mA. Same with bluetooth connected. LED not flashing.

Current draw reduces by about 600uA from these numbers when connected to phone by bluetooth, which happened about 35 seconds after power on.