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IoTHub temperature control

Placeholders

<wifi-ssid>: your wifi network
<wifi-pass>: the password of your wifi network
<server-host>: the ip of your laptop in your wifi network
<new-espurna-password>: the password you assign to your Espurna device
<device-name>: the name of your device as registered in the iot hub
<iot-hub-hostname>: the host name of your iot hub
<sr-value>: the value of the SAS
<it-hub-connection-string>: the iot hub connection string

Flash the firmware

git clone https://github.com/mirko/SonOTA.git
cd SonOTA
pip3 install -r requirements.txt
curl -fsSL https://github.com/xoseperez/espurna/releases/download/1.13.2/espurna-1.13.2-itead-sonoff-th.bin -o static/image_arduino.bin
python sonota.py --wifi-ssid <wifi-ssid> --wifi-password <wifi-ssid> --serving-host <server-host>
  • Next steps must be done one by one because of every firmware will start a ssid with the same name (FinalStage)
  • Look for your itead wifi network and connect to it (the password is 12345678)
  • Follow the instruction on screen (connect to the FinalStage wifi) and let the process finish everything
  • Take note of your espurna wifi access point name
  • Reactivate the firewall

Configure espurna

  • Connect to to your espurna access point
  • Open http://192.168.4.1 (wifi password is fibonacci)
  • Login into espurna with user admin and password fibonacci
  • Replace the wifi password with <new-espurna-password>
  • Forget the ssid and reconnect to it with the new password
  • Open again http://192.168.4.1 (wifi password is <new-espurna-password>)
  • Check status: on, off. temperature.
  • On general: hostname
  • On sensors: Report every 1 (to send data each six seconds)
  • mqtt: on, mqtt broker, json payload
  • admin: enable http api, http api key
  • On wifi: Add a new ssid (, , 212.0.122.155, static ip: 10.100.136.XX (1-99))
  • Reboot the device
  • Connect to the local wifi
  • Open 10.100.136.XX with user admin and password <new-espurna-password>
  • Check everything is ok

Provision the IoT Hub

  • Create the hub
  • Define a device named <device-name>

Create SAS token

  • Go to the portal and select the iot hub
  • Click on shared access policies, select iothubowner and copy the Connection string primary key
  • Install Device Explorer and run it
  • Paste the previous connection string in the "IoT Hub Connection String" textarea and press the update button
  • Go to the Management section
  • Copy the data from the device (you will need the SharedAccessSignature sr)
  • Go to the Data section and press "Monitor"

Test the mqqt connection

mosquitto_pub -d -h <iot-hub-hostname>.azure-devices.net -i <device-name> -u "<iot-hub-hostname>.azure-devices.net/<device-name>" -P "SharedAccessSignature sr=<sr-value>" -m "mosquitto goes live now" -t "devices/<device-name>/messages/events/readpipe/" -p 8883 --cafile /etc/ssl/certs/ca-certificates.crt -V mqttv311

Run the mqtt-iothub bridge

  • Download and run the bridge project
git clone https://github.com/capside/iot-hub-bridge
cd iot-hub-bridge
npm install
node index.js "SharedAccessSignature sr=<sr-value>" mqtt://localhost

Start visualization

git clone https://github.com/capside/web-apps-node-iot-hub-data-visualization
cd web-apps-node-iot-hub-data-visualization
  • Set the env variables
set Azure.IoT.IoTHub.DeviceId=<device-name>
set Azure.IoT.IoTHub.ConnectionString=HostName=<it-hub-connection-string>
set Azure.IoT.IoTHub.ConsumerGroup=chart
set PORT=3000
  • Start the server
npm start