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 Display Set, or individual components:
- 1x LCD Module
- 1x Core Module
- 1x Mini Battery Module
- 1x Radio Dongle
-
One of these options:
- HARDWARIO Playground installed (recommended) You can find more information in the Quick Start Guide document.
- Raspberry Pi with the HARDWARIO Raspbian distribution You can find more information in the document Raspberry Pi Installation.
- HARDWARIO Firmware Tool installed You can find more information in the document Toolchain Setup.
Firmware Upload
In this procedure we will use the HARDWARIO 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 HARDWARIO 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 HARDWARIO 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
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, HARDWARIO Radio Dongle and HARDWARIO 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.