This document will guide you through the Radio Climate Monitor project. You will be able to see dashboard with temperature, humidity, ambient light and atmospheric pressure in Node-RED and view the data on your smart phone using the Blynk cloud and mobile app.

Block Concept

Requirements

  • Either BigClown Radio Climate Monitor Kit, or individual components:

    • 1x BigClown Climate Module

    • 1x BigClown Core Module

    • 1x BigClown Mini Battery Module

    • 1x BigClown Radio Dongle

  • One of these options:

    • BigClown Playground installed (recommended)

      You can find more information in the Quick Start Guide document.

    • Raspberry Pi with the BigClown Raspbian distribution

      You can find more information in the document Raspberry Pi Installation.

    • BigClown Toolchain installed

      You can find more information in the document Toolchain Setup.

Firmware Upload

In this procedure we will use the BigClown Playground to upload firmware to the Core Module.

  1. Connect the Micro USB cable to the Core Module and your computer.

  2. Run the BigClown Playground. In the Firmware tab choose and upload the bcf-radio-climate-monitor firmware to the Core Module:

  3. Remove the Micro USB cable from the Core Module and your computer.

Hardware Assembling

See short video with easy step by step demonstration:

  1. Start with the Mini Battery Module.

  2. Plug the Core Module on top of the Mini Battery Module.

  3. Plug the Climate Module on top of the Core Module.

Playground Bootstrap

  1. Open Node-RED in your web browser:

    http://localhost:1880/

  2. You should see the empty workspace with Flow 1.

  3. Insert the following snippet in the flow (using Menu >> Import) and click in Flow 1 tab:

    [{"id":"2fc604fc.3b6abc","type":"inject","z":"dfc861b.b2a02a","name":"List all gateways","topic":"gateway/all/info/get","payload":"","payloadType":"str","repeat":"","crontab":"","once":false,"x":560,"y":460,"wires":[["a2c10833.24d5d8"]]},{"id":"1e4502b8.2f63fd","type":"inject","z":"dfc861b.b2a02a","name":"Start node pairing","topic":"gateway/usb-dongle/pairing-mode/start","payload":"","payloadType":"str","repeat":"","crontab":"","once":false,"x":570,"y":580,"wires":[["795ff5a7.8e266c"]]},{"id":"3d844ce2.932864","type":"inject","z":"dfc861b.b2a02a","name":"Stop node pairing","topic":"gateway/usb-dongle/pairing-mode/stop","payload":"","payloadType":"str","repeat":"","crontab":"","once":false,"x":560,"y":640,"wires":[["5967c452.c838bc"]]},{"id":"f202b253.2705b","type":"inject","z":"dfc861b.b2a02a","name":"List paired nodes","topic":"gateway/usb-dongle/nodes/get","payload":"","payloadType":"str","repeat":"","crontab":"","once":false,"x":560,"y":520,"wires":[["f0aca138.0b2c3"]]},{"id":"349f02fd.890f6e","type":"inject","z":"dfc861b.b2a02a","name":"Unpair all nodes","topic":"gateway/usb-dongle/nodes/purge","payload":"","payloadType":"str","repeat":"","crontab":"","once":false,"x":560,"y":700,"wires":[["2f1c5bb6.53d6f4"]]},{"id":"cf61d75d.4ad8f8","type":"mqtt in","z":"dfc861b.b2a02a","name":"","topic":"#","qos":"2","broker":"67b8de4a.029d3","x":530,"y":400,"wires":[["a5cb0658.f5d658"]]},{"id":"a5cb0658.f5d658","type":"debug","z":"dfc861b.b2a02a","name":"","active":true,"console":"false","complete":"false","x":790,"y":400,"wires":[]},{"id":"a2c10833.24d5d8","type":"mqtt out","z":"dfc861b.b2a02a","name":"","topic":"","qos":"","retain":"","broker":"717f7c18.ba0a24","x":770,"y":460,"wires":[]},{"id":"f0aca138.0b2c3","type":"mqtt out","z":"dfc861b.b2a02a","name":"","topic":"","qos":"","retain":"","broker":"717f7c18.ba0a24","x":770,"y":520,"wires":[]},{"id":"795ff5a7.8e266c","type":"mqtt out","z":"dfc861b.b2a02a","name":"","topic":"","qos":"","retain":"","broker":"717f7c18.ba0a24","x":770,"y":580,"wires":[]},{"id":"5967c452.c838bc","type":"mqtt out","z":"dfc861b.b2a02a","name":"","topic":"","qos":"","retain":"","broker":"717f7c18.ba0a24","x":770,"y":640,"wires":[]},{"id":"2f1c5bb6.53d6f4","type":"mqtt out","z":"dfc861b.b2a02a","name":"","topic":"","qos":"","retain":"","broker":"717f7c18.ba0a24","x":770,"y":700,"wires":[]},{"id":"67b8de4a.029d3","type":"mqtt-broker","z":"","broker":"localhost","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"willTopic":"","willQos":"0","willPayload":"","birthTopic":"","birthQos":"0","birthPayload":""},{"id":"717f7c18.ba0a24","type":"mqtt-broker","z":"","broker":"localhost","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"willTopic":"","willQos":"0","willPayload":"","birthTopic":"","birthQos":"0","birthPayload":""}]

    It will look like this:

  4. Deploy the flow using the Deploy button in the top-right corner.

  5. Open the debug tab:

  6. Click on the List all gateways button. You should see a response like this in the debug tab:

Radio Pairing

In this section, we will create a radio link between the Radio Dongle and the Radio Climate Monitor.

Follow these steps in Node-RED:

  1. Click on the Start node pairing button.

  2. Insert the batteries into the Radio Climate Monitor to send the pairing request (you should also see the red LED on the Core Module to be on for about 2 seconds).

  3. Click on the Stop node pairing button.

Communication Test

Follow these steps in Node-RED:

  1. Switch to debug tab on the right.

  2. Start breathing on the temperature sensor on the Climate Module to invoke a change of temperature and hence trigger a radio transmission.

    You should then see similar messages:

Enclosure

Optionally put the assembly into the appropriate enclosure, if you have one.

Integration with Blynk

Now we have assembled our kit and let's start with some basic integration with Blynk. We will start without describing what Blynk is. If you want get some information about what Blynk is. The best thing you can do is visit their page. In our example we will be showing you how to display graphs from sensor's values in Blynk's mobile application.

Firstly we need to configure our Node-RED app.

  1. If you are using BigClown raspi version you should be fine, but still check that Blynk nodes are installed. (You can view them on the left side menu in Node-RED). Otherwise you will need to install Node-RED package node-red-contrib-blynk-ws.

  2. Add another Flow (you can add them by big plus button next to the flow name). The new flow will have name Flow 2.

  3. Insert the following snippet in the newly created Flow 2 (using Menu >> Import):

    [{"id":"4914605c.76972","type":"mqtt in","z":"28050251.59dc0e","name":"","topic":"node/climate-monitor:0/lux-meter/0:0/illuminance","qos":"2","broker":"58254712.b61068","x":230,"y":520,"wires":[["431157f1.546248"]]},{"id":"dcf5bf8d.a0242","type":"mqtt in","z":"28050251.59dc0e","name":"","topic":"node/climate-monitor:0/thermometer/0:0/temperature","qos":"2","broker":"58254712.b61068","x":240,"y":580,"wires":[["be96b6aa.eed098"]]},{"id":"2ac2eae7.308486","type":"mqtt in","z":"28050251.59dc0e","name":"","topic":"node/climate-monitor:0/hygrometer/0:4/relative-humidity","qos":"2","broker":"58254712.b61068","x":250,"y":640,"wires":[["dbe4b438.be4ef8"]]},{"id":"431157f1.546248","type":"blynk-ws-out-write","z":"28050251.59dc0e","name":"Pin V0 - Write","pin":0,"pinmode":0,"client":"1b003066.8ca2c","x":659,"y":520,"wires":[]},{"id":"be96b6aa.eed098","type":"blynk-ws-out-write","z":"28050251.59dc0e","name":"","pin":"1","pinmode":0,"client":"1b003066.8ca2c","x":659,"y":580,"wires":[]},{"id":"dbe4b438.be4ef8","type":"blynk-ws-out-write","z":"28050251.59dc0e","name":"","pin":"2","pinmode":0,"client":"1b003066.8ca2c","x":659,"y":640,"wires":[]},{"id":"58254712.b61068","type":"mqtt-broker","z":"","broker":"localhost","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"willTopic":"","willQos":"0","willPayload":"","birthTopic":"","birthQos":"0","birthPayload":""},{"id":"1b003066.8ca2c","type":"blynk-ws-client","z":"","name":"","path":"wss://blynk-cloud.com:9443/websockets","key":"","dbg_all":false,"dbg_read":false,"dbg_write":false,"dbg_notify":false,"dbg_mail":false,"dbg_prop":false,"dbg_low":false,"dbg_pins":""}]

    It will look like this:

  4. Configure MQTT node to connect it on you broker. It will propably connect on localhost if you are using Raspberry Pi. After that you will need to configure Blynk node. Just fill in URL wss://blynk-cloud.com:9443/websockets. The secret key we will configure later after obtaining one.

  5. Now download the Blynk app from App Store or Google Play.

  6. After installing, you should create account, login and you should see something like that:

  7. Now click a button on the top right to scan QR code.

  8. Now you should scan following QR code to get everything preconfigured.

  9. You should see something like this:

  10. Click the settings wheel and you should see settings for your project. Wee need to get auth-token which we will copy to our Node-RED in Blynk node configuration.

  11. Now deploy your Node-RED app and hit play button in your Blynk project and you should be done!

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