RS485 3in1 Light Intensity Sensor Modbus Protocol Temperature and Humidity Transmitter Sensor

Specification DC power supply 10 30VDCMaximum power consumption 0 4WAccuracy Humidity 3 RH 5 RH 95 RH 25C Temperature 0 5C 25C Light intensity 7 25C Light intensity range 0 65535luxWorking temperature 20 60C 0 RH 80 RHLong term stability Temperature 0 1C yHumidity 1 yLight intensity 5 yResponse time Temperature 18S 1m s wind speed Humidity 6s 1m s wind speed Light intensity 0 1SOutput signal RS485 output Modbus protocol Cable colorinstructionPowerBrown10 30V DC power BlackPower communicationyellow485 Ablue485 b The default baud rate is 4800bit s and the default address is 0x01 1 communication protocolCode8 bit binary systemData bits8bitsparity check bitNOstop bitNOError checkingCRCbaud rate2400bit s4800bit s9600 bit s4800bits by default2 Using Modbus RTU communication protocol the format is as follows The initial structure is more than 4 bytes of timeAddress code 1 bytesFunction 1 bytesData area N bytesError check 16 bit CRC codeThe end of the structure is greater than or equal to 4 bytes of timeAddress code the address of the transmitter which is unique in the communication network factory default 0x01 Function code the instruction function instruction from the host The transmitter only uses the function code 0x03 read register data Data area data area is specific communication data pay attention to 16bits data before the high byte CRC Code two byte check codeHost query frame structure Address c