def set_desired_properties(device_id):
speed = request.form["speed"]
payload = {'properties': {'desired': {'speed': int(speed)}}}
payload_json = json.dumps(payload)
iot_hub = IoTHub(os.environ['IOT_HUB_NAME'],
os.environ['IOT_HUB_OWNER_KEY'])
twin_data = iot_hub.update_twin(device_id, payload_json)
resp = Response(twin_data)
resp.headers['Content-type'] = 'application/json'
return resp
def create_devices():
iot_hub = IoTHub(os.environ['IOT_HUB_NAME'],
os.environ['IOT_HUB_OWNER_KEY'])
iot_device_count = 10
devices = []
for i in range(iot_device_count):
device_id = 'MACHINE-{0:03d}'.format(i)
device = iot_hub.create_device(device_id)
devices.append(device)
rotor_imbalance_device_id = devices[-1].deviceId
low_pressure_device_id = devices[-2].deviceId
def failure_onset(device_id):
if device_id == rotor_imbalance_device_id:
return 'F01'
if device_id == low_pressure_device_id:
return 'F02'
return None
for device in devices:
twin_properties = {
'tags': {
'simulated': True,
'simulator': 'devices.engines.Engine'
},
'properties': {
'desired': {
'speed': random.randint(600, 1500),
'mode': 'auto',
'failureOnset': failure_onset(device.deviceId)
}
}
}
iot_hub.update_twin(device.deviceId, json.dumps(twin_properties))
return redirect(url_for('telemetry'))
def set_desired_properties(device_id):
desired_props = {}
for key in request.form:
if key == 'speed':
desired_props[key] = int(request.form[key])
else:
desired_props[key] = request.form[key]
payload = {'properties': {'desired': desired_props}}
payload_json = json.dumps(payload)
iot_hub = IoTHub(os.environ['IOT_HUB_NAME'],
os.environ['IOT_HUB_OWNER_KEY'])
twin_data = iot_hub.update_twin(device_id, payload_json)
resp = Response(twin_data)
resp.headers['Content-type'] = 'application/json'
return resp
twin_data_json = json.loads(twin_data)
twin_properties = twin_data_json['properties']
if 'speed' not in twin_properties['desired']:
twin_properties = {
'properties': {
'desired': {
'speed':
random.randint(600, 1500),
'spectralProfile':
json.dumps(healthy_spectral_profile if
device.deviceId != rotor_imbalance_device_id
else rotor_imbalance_speactral_profile),
'pressureFactor':
2 if device.deviceId != low_pressure_device_id else 1.5
}
}
}
iot_hub.update_twin(device.deviceId, json.dumps(twin_properties))
processes = []
for device in devices:
processes.append(
Process(target=device_driver, args=(device.deviceId, )))
for process in processes:
process.daemon = True
process.start()
while all(map(lambda c: c.is_alive(), processes)):
time.sleep(3)