Device Data (Uplink)

devdata values are sent from the device to the backend. They report real‑time state, sensor readings, and status flags. The device sends them automatically on change, at a configurable periodic interval (devcfg.core.update_period_mins), or immediately when you request a value by sending null for a devdata key in a downlink message.

{
  "devdata": {
    "<group>": {
      "<field>": <value>
    }
  }
}

Group	Key path
Core State	`devdata.core`
Alert State	`devdata.alert`
Power	`devdata.power`
Firmware Info	`devdata.fw`
UI State	`devdata.ui`
Audio Results	`devdata.audioin` / `audioout`
BLE Scan Results	`devdata.blescan`
Sensors	`devdata.temp` / `accel`
NFC & Smartcard	`devdata.nfc` / `iso7816`
Time	`devdata.time`
Network State	`net.<name>.state`, wifi/mqtt/ble flags

Uplink Messages — the full uplink directory
Downlink Device Config — how to change settings that affect these data
Reference Tables — alert origins, state codes, and more

Device Data (Uplink)

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