obniz/parts/TemperatureSensor/i2c/S-5851A/index.js

obniz sdk for javascript

//sensor response not found
class S5851A {
  constructor() {
    this.requiredKeys = ['vcc', 'gnd', 'adr0', 'adr1', 'adr_select'];
    this.keys = ['sda', 'scl', 'adr0', 'adr1', 'adr_select', 'i2c'];
  }

  static info() {
    return {
      name: 'S5851A',
    };
  }

  wired(obniz) {
    //params: pwr, gnd, sda, scl, adr0, adr1, adr_select
    this.io_adr0 = obniz.getIO(this.params.adr0);
    this.io_adr1 = obniz.getIO(this.params.adr1);

    this.obniz.setVccGnd(this.params.vcc, this.params.gnd, '5v');

    switch (this.params.adr_select) {
      case 8:
        this.io_adr0.output(false);
        this.io_adr1.output(false);
        this.address = 0x48;
        break;
      case 9:
        this.io_adr0.pull(null);
        this.io_adr1.output(false);
        this.address = 0x49;
        break;
      case 'A':
        this.io_adr0.output(true);
        this.io_adr1.output(false);
        this.address = 0x4a;
        break;
      case 'B':
        this.io_adr0.output(false);
        this.io_adr1.output(true);
        this.address = 0x4b;
        break;
      case 'C':
        this.io_adr0.pull(null);
        this.io_adr1.output(true);
        this.address = 0x4c;
        break;
      case 'D':
        this.io_adr0.output(true);
        this.io_adr1.output(true);
        this.address = 0x4d;
        break;
      case 'E':
        this.io_adr0.output(false);
        this.io_adr1.pull(null);
        this.address = 0x4e;
        break;
      case 'F':
        this.io_adr0.output(true);
        this.io_adr1.pull(null);
        this.address = 0x4f;
        break;
      default:
        this.io_adr0.output(false);
        this.io_adr1.output(false);
        this.address = 0x48;
        break;
    }
    console.log('i2c address=' + this.address);

    this.params.clock = this.params.clock || 400 * 1000; //for i2c
    this.params.mode = this.params.mode || 'master'; //for i2c
    this.params.pull = this.params.pull || '5v'; //for i2c
    this.i2c = obniz.getI2CWithConfig(this.params);
    //obniz.i2c0.write(address, [0x20, 0x24]);
  }

  async getTempWait() {
    //console.log("gettempwait");
    //obniz.i2c0.write(address, [0x20, 0x24]);
    //obniz.i2c0.write(address, [0xE0, 0x00]);
    let ret = await this.i2c0.readWait(this.address, 2);
    //console.log('ret:' + ret);
    let tempBin =
      ret[0].toString(2) + ('00000000' + ret[1].toString(2)).slice(-8);
    let temperature = -45 + 175 * (parseInt(tempBin, 2) / (65536 - 1));
    return temperature;
  }

  async getHumdWait() {
    this.i2c.write(this.address, [0x20, 0x24]);
    this.i2c.write(this.address, [0xe0, 0x00]);
    let ret = await this.i2c.readWait(this.address, 4);
    let humdBin =
      ret[2].toString(2) + ('00000000' + ret[3].toString(2)).slice(-8);
    let humidity = 100 * (parseInt(humdBin, 2) / (65536 - 1));
    return humidity;
  }
}

if (typeof module === 'object') {
  module.exports = S5851A;
}