Can I enable a sensor to receive downlinks at any time?
A downlink message is one that is sent to the sensor from the cloud and is used to configure the sensor itself.
For Class A devices, messages cannot be initiated from the cloud since the sensor is typically sleeping and the radio is turned off, so the sensor itself must initiate a downlink message. The Supervisory Message Event, Device Reset, and Tamper-Open (not Tamper Close) messages all request a downlink message as a response, and the response must be received within 30 seconds of the request.
A Class C device could be configured to always be in receive mode and would therefore be able to receive a Downlink Configuration message at any time. Such a device would need to be externally powered due to the increased power requirements and battery operation would be generally infeasible.
A possible workaround for a Class A Sensor which would enable it to receive downlinks more frequently and independently would be to increase the frequency of the Supervisory Message. For example, a Supervisory Period of 15 minutes would allow the sensor to enter receive four times an hour in order to check for and receive new downlinks at the expense of overall battery life.
As of Firmware Version 1.3 the Supervisory Period can be set anywhere between 1 minute and 127 hours.
How do I decode a Voltage Sensor event?
The Voltage Sensor will generate events if the measured value rises above or falls below the configured thresholds. Byte 0: 7-4 Byte 0: 3-0 Byte 1 Byte 2 Byte 3 & 4 Protocol version (4 bits) Counter (4 bits) Message Type Code ...
How do I decode a sensor's Reset Message?
The Reset Message is sent to the Cloud every time that the Sensor is Reset. Reset Message: 0x00 Device has Reset. The cause of reset is represented in the 5-byte reset code payload. Bytes Description 0 ...
How do I encode a Configuration Downlink for an Air Temperature and Humidity Sensor?
A downlink message is one that is sent to the sensor from the cloud and is used to configure the sensor itself. Messages cannot be initiated from the cloud since the sensor is typically sleeping and the radio is turned off, so the sensor itself must ...
How does the LoRaWAN join process work?
RadioBridge LoRaWAN sensors initialize with a join process that scans though each sub-band until a join request is successful. The joined sub-band is then remembered by the sensor and will be the first sub-band attempted if the sensor needs to ...
How do I decode a Dry Contact Sensor Event?
The wireless Dry Contact Sensor detects a connection between two wires. When the wires are either shorted or opened, the Dry Contact Sensor will generate an event. Byte 0: 7-4 Byte 0: 3-0 Byte 1 Byte 2 Protocol version (4 bits) Counter ...