DT300 Digital wireless room temperature and humidity sensor   Product Description  Overview: humidity sensor   The DT300 is one type of humidity sensor which measure the air temperature and humidity .  LED display and wireless version are optional, such as zigbee, wifi, and GPRS.   It is applicable for industry, home, agriculture remotely measurement and other application, such as IOT (Internet of Things).     Specification: humidity sensor

Measurement Range	Temperature: -55~+125℃,  Humidity: 0%~100%
Accuracy	±0.5℃, ±3%RH
Power Supply	10-32V DC
Output Signal	Field Bus: RS485, CAN Bus
	Wireless: Zigbee, Wifi, GPRS
Protocol	Modbus RTU/ Dingtek
Working Temperature	-40 ~ 85℃
Protection Rank	IP65
LED Display	Optional
Recharge Battery	Optional
Wireless	Optional

  System Diagram: humidity sensor   Notes:  1. For field bus, CAN Bus, RS485 is optional. 2. For wireless, Wifi, zigbee, GPRS/3G is optional. 3. LED display is optional.   Interface Definition Pin 1: Red Line: V+,  Pin 2: Blue Line: RS485 A+ (CAN +) Pin 3: Black Line: GND Pin 4: Yellow Line: RS485 B- (CAN-)     Protocol: humidity sensor 1. Communication

Baud rate	9600
Data bit	8
Stop bit	1
Check sum	none

    2. Request (from pc to sensor)  

Section	Header	Command	ID	Content	Checksum	Tail
Bytes	1	2	2	0/6	2	2
Content	$ (0x24)
Remark		in caption	in ascii, 01~FF,  in caption	for reading, it is 0.  For writing,  it is 6 bytes.	calculate sum from  header to content,  get low 8 bit,  then change to 2 ascii	0x0D 0A

  3. Reply (from sensor to pc)

Section	Header	Command	ID	Content	Checksum	Tail
Bytes	1	2	2	6	2	2
Content	* (0x2A)
Remark		in caption,  see above  command list	in ascii, 01~FF,  in caption	replied value for  reading in mm or  L. OKOKOK for  successful setting.  NONONO for  failed setting	calculate sum from  header to content,  get low 8 bit, then  change to 2 ascii	0x0D 0A

    Command list  

Command list
RT	Read Temperature
RH	Read Humidity
SI	Set ID

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