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Data

A data downlink sends a JSON object down to the device. Your firmware decodes it into a structure with the values filled in — use it to control outputs, change a setpoint, or trigger an action.

  1. Open the device's Messages and click + SCHEDULE DOWNLINK.
  2. Set Message type to data.
  3. Enter the JSON Body your firmware expects, then click SEND.

The "Schedule downlink" dialog with Message type "data" and a JSON body

For example, a CHESTER Control application with four outputs might accept:

{
  "output_1_state": 0,
  "output_2_state": 0,
  "output_3_state": 0,
  "output_4_state": 0
}

The exact keys depend on your device's firmware. Like every downlink, the message is queued and delivered the next time the device boots, sends an uplink, or polls the Cloud.