Lower-Power, Autonomous Meshtastic 'Relay' Nodes?

[Spor7biker]

This thread is probably the best place to start regarding low power nodes as it is the most active and promising:

Building for NRF52 boards

Just wanted to create a separate thread for this open source board based on an nRF52840 and ebyte sx1262 SPI modules. It was developed before I knew about meshtastic and has a ton of advantages such as: great always connected bluetooth implementation, 8dbm tx power for BLE, Adafruit nrf52 Arduino core compatibility (Feather nRF52840 bootloader), Native USB, superior Lora Performance, higher lora tx power options, compatible with SX1268 433mhz modules, really low power consumption, IPS Screen…