Condition:New
Type:Logic ICs
Voltage: 7-24VDC Sensor: SHT30/SHT31
With display:
Without display:
In the high temperature test, the temperature and humidity of the constant temperature and humidity experiment box (the figure below) are compared with the sensor readings (the figure above), and the results are consistent.
Standard MODBUS communication format, 8-bit DIP switch on the board to set the communication address and baud rate, MODBUS function code 04 to read the data, readable: humidity value + temperature value + dew point temperature value 3 values.
Example sending: (01)+(04)+(00 00)+(00 03)+(B0 0B)
Sensor address + function code + register first address + number of read bytes + CRC16 check
Return: (01)+(04)+(06)+(02 03)+(01 30)+(00 C0)+(24 D2)
Sensor address + function code + number of returned bytes + humidity + temperature + dew point temperature + CRC16 check
Humidity (0203) hexadecimal data converted to decimal is 515, the actual humidity is 51.5%;
Temperature (0130) hexadecimal data is converted to decimal 304, the actual temperature is 30.4 degrees Celsius;
The dew point temperature (00C0) hexadecimal data is converted to decimal 192, and the actual dew point temperature is 19.2 degrees Celsius;
Modified to be compatible with 03 04 function code at the request of customers;
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