BikeTrax allows external telemetry devices to send telemetry data to the PowUnity GPS platform. An example of this would be to report an eBike's current battery charge level.
Overview
An external telemetry device is attached to the tracker via UART. This UART interface exposes an AT console. Telemetry values are encoded using the PU protocol, these PU messages are encapsulated in a AT command message and sent over the UART.
This results in the following encpsulation/layers:
UART -> AT -> PU -> The telemetry value