Power supply voltage: 3-5 volts
Power supply current: 7mA
Wiring:
Red - VCC
Black --- GND
Yellow --- RC (serial UART TTL-Rx/I2C -- SCL)
White --- TD (serial UART TTL-Tx/I2C -- SCL)
The module defaults to serial UART mode and automatically outputs data. When the PS solder joints on the PCB are soldered, it is in I2C mode.
1. Internal registers of the module:

Serial port function (send receive mode):
Frame Description:

2. Module support function codes:

3、模块响应时间

5. Module Example:
Write registers and configure registers.
 
 
Configure query mode output, the main station sends frames as A4 06 03 01 AE (hexadecimal 0x01=query mode output)

Configure the baud rate to 115200, and the main station sends frames as A4 06 01 06 B1 (hexadecimal 0x06=115200)

The module response frame is A4 06 01 06 B1, which is the same as the frame sent by the main station, indicating successful configuration
 
The configured emissivity is 0.98, and the main station sends frames as A4 06 07 62 13 (hexadecimal 0x62=decimal 98)

The module response frame is A4 06 07 62 13, which is the same as the frame sent by the main station, indicating successful configuration
Note: Setting emissivity takes a lot of time
Configure a temperature offset of+1 degrees, and the main station sends a frame of A4 06 06 6E 1E (hexadecimal 0x6E=decimal 110)

Configure a temperature offset of -1 degree, and the main station sends a frame of A4 06 06 5A 0A (hexadecimal 0x5A=decimal 90)

If all configurations require power-off saving, a power-off saving command A4 06 05 55 04 needs to be sent
 
Read register, the main station sends frames as A4 03 07 07 B5

The module response frame is: A4 03 07 07 62 0C EB 0C 3F 0E 20 87

Frame resolution:
The starting register 07 starts from the emissivity register, and the number of registers 7 is 07 08 09 0A 0B 0C 0D. The data of these 7 registers is sequentially output
Emissivity
Target temperature
Environmental temperature
Forehead temperature conversion to body temperature
Serial port data continuous output:
a. Send read data frame: Set the starting register and the number of registers.
b. Set the output mode to continuous output mode, that is, write 1 to register 03.
Serial port data query output:
a. Set the output mode to query mode, that is, write 0 to register 03.
b. Send read data frame: Set the starting register and the number of registers.
Note: The output format of the data is determined by the read data frame. The continuous/query mode is determined by register 03.
Frontal temperature compensation:
Changing the value of register 06 can compensate for the forehead temperature. If the target measured value is greater than the target actual value, the register value can be reduced, and vice versa, the register value can be increased.
IIC Function:
This function requires soldering PS solder joints. The IIC address is the 00 register value, defaulting to A4. The IIC rate needs to be less than 400K.
The number of registers written per module is 1. The writing sequence is as follows, and after sending the device address, it should take more than 4us time