Build dedicated
devices with
JavaScript.

1const arda = await device.ready()
2
3// Drive a relay from a button on the screen
4await arda.gpio.mode(17, 'out')
5await arda.gpio.write(17, true)
6
7// React to a physical input
8arda.gpio.watch(27, (pin) => {
9  if (pin.high) {
10    ui.openBarrier()
11  }
12})
13
14// Read the device's own identity
15const info = await arda.system.info()
16console.log(info.deviceId, info.arch)

1// A sale that survives a dead internet line
2const sale = { type: 'sale', total: 1299, items }
3
4// Queued locally, replayed when the link returns
5await arda.sync.push(sale)
6
7await arda.printer.receipt({
8  width: 42,
9  lines: renderReceipt(sale),
10  cut:   true,
11})
12
13await arda.printer.drawer('open')
14
15// Catalogue from the control plane, cached on disk
16const products = await arda.sync.get('products')

1// Attendance kiosk: scan, verify, record
2const cam = await arda.camera.open({ facing: 'front' })
3
4const code = await cam.scanQR({ timeout: 15000 })
5const shot = await cam.capture({ quality: 85 })
6
7// Matching runs on the device — no image leaves it
8const match = await arda.face.match(shot)
9
10if (match.score > 0.82) {
11  await arda.sync.push({
12    type:  'clock-in',
13    staff: match.id,
14    badge: code.text,
15  })
16}