mcp9808-temperature-sensor/examples/alerts.js

MCP9808 I2C temperature sensor

'use strict';

const mcp9808 = require('../');

mcp9808.open({
  i2cBusNumber: 1, // optional, default 1
  i2cAddress: 0x18, // optional, default 0x18
  alertGpioNumber: 27,
  lowerAlertTemperature: 25,
  upperAlertTemperature: 35,
  criticalTemperature: 45
}).then(sensor => {
  setInterval(_ => {
    sensor.temperature().then(temp => console.log(temp.celsius + '°C'));
  }, 1000);

  sensor.on('alert', temp => {
    console.log('  alert ' + temp.celsius + '°C');
    if (temp.critical) {
      console.log('    critical');
    }
    if (temp.aboveUpperLimit) {
      console.log('    above upper limit');
    }
    if (temp.belowLowerLimit) {
      console.log('    below lower limit');
    }
  });

  return sensor.enableAlerts();
}).catch(console.log);