Optional
airPercent of airtime for transmission used within the last hour.
Optional
battery0-100 (>100 means powered)
Optional
channelUtilization for the current channel, including well formed TX, RX and malformed RX (aka noise).
Optional
uptimeHow long the device has been running since the last reboot (in seconds)
Optional
voltage?: numberVoltage measured
Key native device metrics such as battery level