This article works through some example payloads sent by the SensorData LoRaWAN.
Example 1: Soil Moisture and Temperature
Port: 128. Payload: 05786477654682155A595E6061
This decodes to:
128 - Data field ID (SDI-12 Measurement 1)
05 - Soil Moisture, 5 data points
78 (120) = 55%
64 (100) = 45%
77 (119) = 54.5%
65 (101) = 45.5%
46 (70) = 30%
82 (130) - Data field ID (SDI-12 Measurement 2)
15 - Soil Temperature, 5 data points
5A (90) = 5 degC
59 (89) = 4.5 degC
5E (94) = 7 degC
60 (96) = 8 degC
61 (97) = 8.5 degC