import i2c from 'i2c-bus';

export async function bme(address = 0x76) {
    const i2cBus = await i2c.openPromisified(1);
    const data = await Promise.all([
        i2cBus.readByte(address, 0xFA),
        i2cBus.readByte(address, 0xFB),
        i2cBus.readByte(address, 0xFC),
        i2cBus.readByte(address, 0xF7),
        i2cBus.readByte(address, 0xF8),
        i2cBus.readByte(address, 0xF9),
        i2cBus.readByte(address, 0xFD),
        i2cBus.readByte(address, 0xFE),
    ]);
    return {
        temperature: (((data[0] << 12) | (data[1] << 4) | (data[2] >> 4)) / 16384.0 - 5120.0) / 100,
        pressure: ((data[3] << 12) | (data[4] << 4) | (data[5] >> 4))  / 25600,
        humidity: ((data[6] << 8) | data[7]) / 1024.0,
    };
}
console.log(await bme());