[SM1213B]  10-channel sht30 temperature and humidity acquisition module


Technical Parameters

Technical parameterParameter value
Temperature measuring range-30℃~80℃
Temperature measuring accuracy±0.5℃ @25℃
Support sensorSHT30
Input busIIC
Communication InterfaceRS485
Default baud rate9600 8 n 1
PowerDC9~24V 1A
Running temperature-30~85℃

Product Size


Wiring instructions

    Any incorrect wiring can cause irreversible damage to the product. Please carefully wire the cable as follows in the case of power failure, and then connect the cable to confirm the correctness and then use it again.
IDCore colorIdentificationNote
1RedV+Power +
2GreenV-Power -
3YellowA+RS485 A+
4BlueB-RS485 B-

Why choose this product?

SM1213B SM1213B SM1213B SM1213B

Application solution

SM1213B SM1213B

How to use?



SM1213B SM1213B SM1213B SM1213B SM1213B

Communication Protocol

    The product uses RS485 MODBUS-RTU standard protocol format, all operation or reply commands are hexadecimal data. The default device address is 1 when the device leaves the factory, and the module or NON-Recorder default baud rate is 9600,8,n,1 ,but data recorder default baud rate is 115200 .
1. Read data (function code 0x03)
    Inquiry frame (hexadecimal), sending example: query 1 data of 1# device, the upper computer sends the command: 01 03 00 00 00 0A C5 CD .
Address Function Code Start Address Data Length Check Code
010300 0000 0AC5 CD
    For the correct query frame, the device will respond with data: 01 03 14 00 79 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 26 31 , response format:
Address Function Code LengthData 1Data 2Data 3Data 4Data 5Data 6Data ...Data 23Data 24Check Code01
03 1400 7900 7A00 7B00 7C00 7D00 7E............00 7900 79 26 31
    Data description: The data in the command is hexadecimal, take data 1 as an example, 00 79 is converted to decimal value as 121, assuming the data magnification is 100, then the real value is 121/100=1.21, Others and so on.
2. Common data address table
Configuration Address Register Address Register Description Data Type Value Range
4000100 001#temperature registerRead Only0~65535
4000200 012#humidity registerRead Only0~65535
4000300 023#temperature registerRead Only0~65535
4000400 034#humidity registerRead Only0~65535
4000500 045#temperature registerRead Only0~65535
4000600 056#humidity registerRead Only0~65535
4002300 1623#temperature registerRead Only0~65535
4002400 1724#humidity registerRead Only0~65535
4010100 64Model CodeRead/Write0~65535
4010200 65 total number of measuring points read/write 1~20
4010300 66device addressread/write1~249
4010400 67baud rateread/write0~6
4010500 68communication moderead/write1~4
4010600 69protocol typeread/write1~10

Setup Software
Development File

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