# place here your wifi configuration
wifi.link("SSID", wifi.WIFI_WPA2, "PSW")
pkey = helpers.load_key('private.hex.key')
device_conf = helpers.load_device_conf()
publish_period = 5000
# choose an appropriate way to get a valid timestamp (may be available through hardware RTC)
def get_timestamp():
user_agent = {"user-agent": "curl/7.56.0"}
return json.loads(
requests.get('http://now.httpbin.org',
headers=user_agent).content)['now']['epoch']
# create a google cloud device instance, connect to mqtt broker, set config callback and start mqtt reception loop
device = iot.Device(device_conf['project_id'], device_conf['cloud_region'],
device_conf['registry_id'], device_conf['device_id'], pkey,
get_timestamp)
device.mqtt.connect()
device.on_config(config_callback)
device.mqtt.loop()
while True:
print('publish random sample...')
device.publish_event(json.dumps({'asample': random(0, 10)}))
sleep(publish_period)
wifi.link(device_conf['wifi_ssid'], wifi.WIFI_WPA2,
device_conf['wifi_password'])
print('> linked')
sampling_period = 2000
ateccx08a.hwcrypto_init(
I2C0,
2,
i2c_addr=device_conf['i2caddr'],
dev_type=helpers.conf2atecctype[device_conf['devtype']])
# create a google cloud device instance, connect to mqtt broker, set config callback and start mqtt reception loop
device = iot.Device(device_conf['project_id'],
device_conf['cloud_region'],
device_conf['registry_id'],
device_conf['device_id'],
'',
helpers.get_timestamp,
custom_jwt=ateccx08a.encode_jwt)
print('> mqtt connect')
device.mqtt.connect()
print('> connected')
device.on_config(config_callback)
while True:
print('> publish sample.')
rand_val = random(0, 10)
device.publish_event({'rand': rand_val})
sleep(sampling_period)