OY1700 LoRaWAN Air quality (PM) sensor, User manual, Version 0.1
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0x00: bit0 =0 => Normal startup
bit1 =0 => No boot problem
bit2-7 reserved
The expected behavior is 0x01 20 00. If not contact support.
8.3
Periodic measurement reports
8.3.1
Periodic measurement report
The default configuration is that particles, temperature and humidity are measured and
transmitted every 15
th
minute. The data is packed into minimal number of bytes to minimizing
interference.
Port:
Port 2
Payload: Measurement value (see
chap 8.3.2)
Size: 5 Bytes
8.3.2
Measurement value
The measurement value for each measurement
Byte 0: Temperature, bit 11 – bit 4
Byte 1: Relative humidity, bit 11 – bit4
Byte 2:
bit 7-4: Temperature, bit 3 – bit 0
bit 3-0: Relative humidity, bit 3 – bit 0
Byte 3-4: PM10 sent as an unsigned 16-bit integer
Byte 5-6: PM2.5 sent as an unsigned 16-bit integer
Byte 7-8: PM1.0 sent as an unsigned 16-bit integer
8.3.2.1
Temperature conversion
The temperature measurement is transmitted using an unsigned 12-bit value. The scaling is
1/10 °C and the offset is 80 °C, which means the received value should be subtracted by 800
and then divided with 10 to get it in °C.
