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node-airthings-waveplus

Node.js module for reading data from a Airthings Wave Plus indoor air quality monitor.

Tested on Raspberry Pi 3. Depends on noble. See instructions on how to enable BLE on RasPi and how to run without root.

Installation

npm install airthings-waveplus

Usage example

Events

Module wavePlus emits a found event, when a new Wave Plus device is discovered. Event's payload is a wavePlus object (see below)

API

wavePlus object

Is an eventEmitter .

Properties:

  • id: id of beacon
  • address: address of beacon
  • serialNumber: serial number of device
  • connectable: flag if beacon is connectable

Events:

updated: emitted when air quality data is received. Object data has following properties:

  • rssi
  • humidity
  • temperature
  • pressure
  • co2
  • voc
  • radonLtAvg
  • radonStAvg

Kudos for inspiration and example to pakastin!

node-airthings-waveplus's People

Contributors

iler avatar pakastin avatar

Stargazers

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Watchers

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Forkers

pakastin alegri1 ecoen66 jallen2281

node-airthings-waveplus's Issues

TypeError: Cannot read property 'read' of undefined

When running the sample, it discovers my Wave and it prints the proper serial number of the device (so I know it was found).

Though then immediately I get an error. Any idea what might be wrong? Looks like for some reason peripheral.discoverSomeServicesAndCharacteristics is not returning characteristics, but is also not throwing an error.

/home/pi/wave-node/node_modules/airthings-waveplus/waveplus.js:101
characteristics[0].read((error, data) => {
^

TypeError: Cannot read property 'read' of undefined
at /home/pi/wave-node/node_modules/airthings-waveplus/waveplus.js:101:26
at /home/pi/wave-node/node_modules/@abandonware/noble/lib/peripheral.js:119:13
at Service. (/home/pi/wave-node/node_modules/@abandonware/noble/lib/service.js:56:7)
at Object.onceWrapper (events.js:422:26)
at Service.emit (events.js:315:20)
at Noble.onCharacteristicsDiscover (/home/pi/wave-node/node_modules/@abandonware/noble/lib/noble.js:398:13)
at NobleBindings.emit (events.js:315:20)
at NobleBindings.onCharacteristicsDiscovered (/home/pi/wave-node/node_modules/@abandonware/noble/lib/hci-socket/bindings.js:368:8)
at Gatt.emit (events.js:315:20)
at Object.callback (/home/pi/wave-node/node_modules/@abandonware/noble/lib/hci-socket/gatt.js:515:12)

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