RFM69 Pager Transmitter

This is a relatively complete project for building a DIY pager transmitter using an Adafruit Feather LoRa board and ESP8266. Two microcontrollers are used to enable full remote shutdown of the transmitter. This repo contains the following,

• Code for an ESP8266, which acts as a bridge between MQTT and the Adafruit LoRa board. This simply writes out the MQTT messages to UART.
• Code for an Adafruit LoRa (433MHz variant) board, which configures the RFM69 to transmit FSK and perform the POCSAG encoding. This is mostly based around a modified pocsag-tool by hazardousfirmware (Thank you!)
• A KiCAD PCB for connecting up the ESP8266 and AdaFruit Feather boards. It includes a separate voltage regulator, which taps the 5v from the Feather. The ESP8266 pulls the Feather's enable pin to ground, which shuts off its 3.3v regulator.
• A quick laser cut box designed with MakerCase and Inkscape. The final version ended up being slightly different I think after some tweaking next to the laser cutter.

I have two deployments of this now:

• At home, using my callsign M6PIU.
• At Nottingham Hackspace, using the FAC callsign MB7PNH (Pager NottingHack).