Since the device will be deployed outside, battery powered and re-charged via solar panel I thought it would be a nice idea to have it send me some periodic (or upon request) telemetry data. This includes:

• Voltage of the solar panel
• Voltage of the step-up converter afer the solar panel
• Current battery voltage
• Battery charge indicator (charging/not-charging)
• Ambient temperature
• Battery charge time (since last report)
• Number of received RF commands but with a failed MAC (KeeLoq hacking attempt)

The telemetry data sent by the device to the controller is also protected with a MAC so that I can verify it is the device sending me this data, not someone else.