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LSN50V2-S31 LoRaWAN Outdoor Temperature & Humidity Sensor 12 / 22
2.3 Uplink Payload
2.3.1 Payload Analyze
Normal Upload Payload:
LSN50v2-S31 use the same payload as LSn50v2 mod1, as below.
Battery:
Check the battery voltage.
Ex1: 0x0B45 = 2885mV
Ex2: 0x0B49 = 2889mV
Temperature:
Example:
If payload is: 0105H: (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
If payload is: FF3FH : (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
Humidity:
Read:0x(0197)=412 Value: 412 / 10=41.2, So 41.2%
Alarm Flag & MOD:
Example:
If payload & 0x01 = 0x01 → This is an Alarm Message
If payload & 0x01 = 0x00 → This is a normal uplink message, no alarm
Size(bytes)
2
4
1
2
2
Value
Battery
Ignore
Alarm Flag
Temperature
Humidity