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Radio LCD Thermostat

This document will guide you through the Radio LCD Thermostat project. With this gadget you will be able to control remotly you temperature.

Block Concept

Requirements

  • Either BigClown Radio LCD Thermostat Kit, or individual components:

    • 1x BigClown LCD 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 Firmware Tool 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.

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

Step 2: Flash firmware

Run the BigClown Playground. In the Firmware tab choose and upload the bcf-radio-lcd-thermostat firmware to the Core Module:

Flashing Core Module R1 & R2 For differences of flashing older Core Module 1 and newer Core Module 2 please read Core Module R1 and R2 comparison in the Hardware section

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

At this point your firmware is successfully uploaded.

Hardware Assembling

See short video with easy step by step demonstration:

Step 1: Start with the Mini Battery Module

Make sure the Mini Battery Module does not have batteries inserted.

Step 2: Plug the Core Module on top of the Mini Battery Module

Step 3: Plug the LCD Module on top of the Core Module

Playground Bootstrap

If you are using the new BigClown Playground, then use the Functions tab instead of using http://localhost:1880/. Also the pairing process is now done in Devices tab. For communication test use the Messages tab.

Step 1: Open Node-RED in your web browser

http://localhost:1880/

Step 2: You should see the empty workspace with Flow 1

Step 3: Insert the following snippet in the flow (using Menu >> Import)

[{"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":"127.0.0.1","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":"127.0.0.1","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"willTopic":"","willQos":"0","willPayload":"","birthTopic":"","birthQos":"0","birthPayload":""}]

It will look like this:

This snippet provides control buttons for gateway/radio commands. These commands are sent over the MQTT protocol.

Step 4: Deploy the flow using the Deploy button in the top-right corner

Step 5: Open the debug tab

In the debug tab, you will be able to see all the MQTT messages.

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

At this point, you've got working Node-RED, MQTT, BigClown Radio Dongleand BigClown Gateway.

Radio Pairing

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

Follow these steps in Node-RED:

Step 1: Click on the Start node pairing button

Step 2: Insert the batteries into the Radio LCD Thermostat to send the pairing request (you should also see the red LED on the Core Module to be on for about 2 seconds)

Step 3: Click on the Stop node pairing button

At this point, you've got established a radio link between the node (Radio LCD Thermostat and the gateway (Radio Dongle).

Communication Test

Follow these steps in Node-RED:

Step 1: Switch to debug tab on the right

Step 2: Insert the following snippet in the flow (using Menu >> Import)

[{"id":"12b3deae.bbbdf1","type":"mqtt in","z":"f2f80e07.95983","name":"","topic":"node/lcd-thermostat:0/#","qos":"2","broker":"25b87ea5.743312","x":390,"y":320,"wires":[["7694514b.9b64d"]]},{"id":"7694514b.9b64d","type":"debug","z":"f2f80e07.95983","name":"","active":true,"console":"false","complete":"false","x":630,"y":320,"wires":[]},{"id":"25b87ea5.743312","type":"mqtt-broker","z":"","broker":"127.0.0.1","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"willTopic":"","willQos":"0","willPayload":"","birthTopic":"","birthQos":"0","birthPayload":""}]

Step 3: If you see some messages in debug log (like temperature) your kit works correctly

At this point, you've got verified radio communication.

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 monitor your temperature in time graph. As well as switch your relay which depends on pre-set temperature.

Firstly we need to configure our Node-RED app.

Step 1: Blynk nodes

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.

Step 2: Add another flow (you can add them by big plus button next to the flow name)

Step 3: Insert the following snippet in the flow (using Menu >> Import)

[{"id":"85a6bc11.f6088","type":"tab","label":"Flow 2","disabled":false,"info":""},{"id":"cdb6da8f.c84f88","type":"blynk-ws-out-write","z":"85a6bc11.f6088","name":"","pin":"1","pinmode":0,"client":"172c134d.989ead","x":700,"y":440,"wires":[]},{"id":"9dd2498e.466368","type":"mqtt in","z":"85a6bc11.f6088","name":"","topic":"node/lcd-thermostat:0/thermometer/0:1/temperature","qos":"2","broker":"3d7de0ee.6b9ed","x":210,"y":140,"wires":[["2390ca91.f7db36"]]},{"id":"c35cea67.a92b48","type":"inject","z":"85a6bc11.f6088","name":"Every 1 second","topic":"","payload":"","payloadType":"date","repeat":"1","crontab":"","once":false,"onceDelay":"","x":130,"y":440,"wires":[["10c14148.1cc99f","19338151.912a9f"]]},{"id":"5b5fb6fe.549268","type":"mqtt out","z":"85a6bc11.f6088","name":"","topic":"node/power-controller:0/relay/-/state/set","qos":"","retain":"","broker":"3d7de0ee.6b9ed","x":780,"y":340,"wires":[]},{"id":"2390ca91.f7db36","type":"change","z":"85a6bc11.f6088","name":"","rules":[{"t":"set","p":"temperature","pt":"flow","to":"$number(msg.payload)","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":540,"y":140,"wires":[["63757f48.e9115"]]},{"id":"518ff012.d2933","type":"mqtt in","z":"85a6bc11.f6088","name":"","topic":"node/lcd-thermostat:0/thermometer/set-point/temperature","qos":"2","broker":"3d7de0ee.6b9ed","x":230,"y":60,"wires":[["efd4b628.96d098"]]},{"id":"efd4b628.96d098","type":"change","z":"85a6bc11.f6088","name":"","rules":[{"t":"set","p":"setpoint","pt":"flow","to":"$number(msg.payload)","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":560,"y":60,"wires":[["63757f48.e9115"]]},{"id":"10c14148.1cc99f","type":"change","z":"85a6bc11.f6088","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"temperature","tot":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":400,"y":440,"wires":[["cdb6da8f.c84f88"]]},{"id":"19338151.912a9f","type":"change","z":"85a6bc11.f6088","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"setpoint","tot":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":400,"y":480,"wires":[["32f2b7a7.072788"]]},{"id":"32f2b7a7.072788","type":"blynk-ws-out-write","z":"85a6bc11.f6088","name":"","pin":"2","pinmode":0,"client":"172c134d.989ead","x":700,"y":480,"wires":[]},{"id":"63757f48.e9115","type":"switch","z":"85a6bc11.f6088","name":"comparison","property":"setpoint","propertyType":"flow","rules":[{"t":"gt","v":"temperature","vt":"flow"},{"t":"lte","v":"temperature","vt":"flow"}],"checkall":"true","repair":false,"outputs":2,"x":530,"y":260,"wires":[["b83b5274.58c59"],["4984fb4c.bbe3f4"]]},{"id":"b83b5274.58c59","type":"change","z":"85a6bc11.f6088","name":"true","rules":[{"t":"set","p":"payload","pt":"msg","to":"true","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":670,"y":240,"wires":[["5b5fb6fe.549268"]]},{"id":"4984fb4c.bbe3f4","type":"change","z":"85a6bc11.f6088","name":"false","rules":[{"t":"set","p":"payload","pt":"msg","to":"false","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":670,"y":280,"wires":[["5b5fb6fe.549268"]]},{"id":"172c134d.989ead","type":"blynk-ws-client","z":"","name":"","path":"ws://blynk-cloud.com/websockets","key":"4035de467a9a483b9d1318c92d3fabcb","dbg_all":false,"dbg_read":false,"dbg_write":false,"dbg_notify":false,"dbg_mail":false,"dbg_prop":false,"dbg_sync":false,"dbg_bridge":false,"dbg_low":false,"dbg_pins":"","multi_cmd":false,"proxy_type":"no","proxy_url":""},{"id":"3d7de0ee.6b9ed","type":"mqtt-broker","z":"","broker":"127.0.0.1","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","willTopic":"","willQos":"0","willPayload":""}]

It will look like this:

Step 4: Connect

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 Blynknode. Just fill in URL ws://blynk-cloud.com/websockets. The Auth Token we will configure later after obtaining one from Blynk over e-mail.

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

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

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

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

Step 9: You should see something like this, just without the temperatures values yet

Step 10: Email

Click the settings wheel and you should see settings for your project. We need to get Auth Token which you have to copy to our Node-RED in Blynk node configuration.

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

Related Documents

Contents
Block Concept
Requirements
Firmware Upload
Step 1: Connect the Micro USB cable to the Core Module and your computer
Step 2: Flash firmware
Step 3: Remove the Micro USB cable from the Core Module and your computer
Hardware Assembling
Step 1: Start with the Mini Battery Module
Step 2: Plug the Core Module on top of the Mini Battery Module
Step 3: Plug the LCD Module on top of the Core Module
Playground Bootstrap
Step 1: Open Node-RED in your web browser
Step 2: You should see the empty workspace with Flow 1
Step 3: Insert the following snippet in the flow (using Menu >> Import)
Step 4: Deploy the flow using the Deploy button in the top-right corner
Step 5: Open the debug tab
Step 6: Click on the List all gateways button. You should see a response like this in the debug tab
Radio Pairing
Step 1: Click on the Start node pairing button
Step 2: Insert the batteries into the Radio LCD Thermostat to send the pairing request (you should also see the red LED on the Core Module to be on for about 2 seconds)
Step 3: Click on the Stop node pairing button
Communication Test
Step 1: Switch to debug tab on the right
Step 2: Insert the following snippet in the flow (using Menu >> Import)
Step 3: If you see some messages in debug log (like temperature) your kit works correctly
Integration with Blynk
Step 1: Blynk nodes
Step 2: Add another flow (you can add them by big plus button next to the flow name)
Step 3: Insert the following snippet in the flow (using Menu >> Import)
Step 4: Connect
Step 5: Now download the Blynk app from App Store or Google Play
Step 6: After installing, you should create account, login and you should see something like that
Step 7: Now click a button on the top right to scan QR code
Step 8: Now you should scan following QR code to get everything preconfigured
Step 9: You should see something like this, just without the temperatures values yet
Step 10: Email
Step 11: Now deploy your Node-RED app and hit play button in your Blynk project and you should be done!
Related Documents