User Manual

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Packet Parsing

Packet Initialization

After being powered on or reboot, SenseCAP Sensor Nodes will be connected to the network using the

OTAA activation method. Each Sensor Node will send data packets to the server, including the following

data:

Initial packets（no need to learn about these initial packets）

⚫ One packet with device info including hardware version, software version, battery level, sensor

hardware & software version, sensor EUI, power, and sensor power time counter at each channel.

Measurement data packets

The only thing we should pay attention to is the sensor measurement data packets

Packet Structure

The structure of the frame is shown in the image below.

1 byte for channel，default as 1, means the sensor has been well connected.

2 bytes for frame type, in this case, it will be 0110 and 0210, means temperature value and humidity

value

4 bytes for content, is the sensor value with CRC

The frame content is sent in little-endian byte order

5.1.1 Example 1 - Air Temperature & Humidity Sensor:

Air Temperature & Humidity Sensor measurement packet: 010110B068000001021088F400008CFF