NodeMCU (ESP8266) RFM95W driver and GPS position transmitter.
##Performance measurements
###Ground testing
- 186 mA average with a two second transmit interval.
- 3x Energizer Lithium AA (in series). ~70F. Commit 06c27e2b02faea0474bddef3aae2bb2e3d088c82. Results: 45,393 messages sent over 25h18m.