Read temperature and humidity data from Inkbird ibs-TH1.

readme.md

This Gist contains an example code fragment of how to read temperature and humidity data from Inkbird ibs-TH1 bluetooth thermometer in NodeJS with Noble.

Note that you can also read values directly via command line with gatttool:

gatttool -b <MAC> --char-read --handle=0x002d

Example value:

c8 0a a8 16 00 49 88  

• c8 0a uint16 Little Endian temperature value * 100
• a8 16 uint16 Little Endian humidity value * 100

To find MAC adress of sensor, you can use hcitool.

sudo hcitool lescan

or bluetoothctl.

inkbird.js

const DATA_HND = 0x002d;

const parseData = (data) => {
    const rawTemp = data.readInt16LE(0);
    const rawHum = data.readInt16LE(2);
    return {
        temperature: rawTemp / 100,
        humidity: rawHum / 100
    }
}

exports.readData = async (peripheral) => {
    return new Promise((resolve, reject) => {
        peripheral.readHandle(DATA_HND, function (error, data) {
            if (error) {
                reject(error);
            }
            resolve(
                parseData(data)
            );
        });
    });
}

The CRC in use is modbus crc16

2 Bytes Temperature
2 Bytes Humidity
1 Byte  Sensor (0 → Internal, 1 → External)
2 Bytes Modbus CRC16

excuse me. I also have the Inkbird IBS-TH1 Plus, where can I get the SDK?