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Atrh interface protocol
1. ATRH interface protocol
S/N Parameter Value
1 Digital communication type RS-485 MOD-BUS RTU
2 Bit rate 9600 (1 start bit, 1 stop bit, parity non,
data bits 8)
3
4 Power Supply 6V to 18V DC, Max 5mA
5 Slave ID register address
Default address = 52
0x00 ( R/W)
6 Humidity register address
Value (unsigned int x10)
0x05(Read only)
A value 557 mean 55.7 %RH
7 Temperature register address
Value (signed int x10)
0x06(Read only)
A value 352 mean 35.2 deg C
Cable colour code
S/N Parameter Value
1 Red Supply (+6V to +18V DC)
2 Black Supply Ground
3 Yellow RS-485 (A+)
4 Green RS-485 (B-)
