Introduction
A home should provide a comfortable living space for humans. However, it can pose challenges for individuals with mobility impairments. For example, a person with mobility limitations may encounter difficulties reaching the light switch to turn the lights on or off. Similarly, they may face inconvenience when trying to access remote controls for various devices at home, such as the TV or appliances.
This Proof-of-Concept leverages Google Home Matter technology to create a universal remote-control device capable of managing all devices within a home. This remote-control device can be either a mobile phone or a voice assistant device. It enables control over various smart home devices, including light bulbs, TVs, and other appliances.
Sponsors
The UNIHIKER hardware used in this project is sponsored DFRobot, please buy products from it for supporting this project.
1. DFRobot
Hardware
1. DFRobot UNIHIKER: Central home panel
2. XIAO ESP32S3 Sense: Matter device - WS2812 LED
3. nRF52840 DK: BLE device - TCL USB lamp
4. WS2812 LED module
5. USB LED light
6. Si2302 MOSFET
Connection between XIAO ESP32S3 Sense and WS2812
please refer to the schematic below for wiring between ESP32S3 and WS2812 LED
photo of physical connection
Connection between nRF52840 DK, Si2302 and USB lamp
please refer to the schematic below for wiring between nRF52840 DK and USB lamp
photo of physical connection
Software
Python lib on DFRobot UNIHIKER
- http://circuitsframework.com/
- https://github.com/hbldh/bleak/tree/master
SEEED XIAO ESP32S3 Sense
- VS Code with ESPRESSIF ESP-IDF
https://docs.espressif.com/projects/esp-idf/en/v4.2.3/esp32/get-started/vscode-setup.html
Nordic nRF52840 DK
- VS Code with Nordic nRF Connect
https://www.nordicsemi.com/Products/Development-tools/nRF-Connect-for-VS-Code
Getting Started
There are three sub-projects in this PoC. They are
1. Home panel runs on DFRobot UNIHIKER
2. Matter enabled fan device runs on SEEED XIAO ESP32S3
3. BLE controllable lamp device runs on Nordic nRF52840 DK
Build and Test
DFRobot UNIHIKER home panel
1. clone this repository by "git clone https://github.com/teamprof/build2gether-smart-home"
2. follow the instruction on https://www.unihiker.com/wiki/connection to setup WiFi connection, and view its IP address
3. copy folder "src-unihiker" to UNIHIKER by typing the following command in Ubuntu terminal
```
scp -r src-unihiker root@<IP address from step(2)>:~/
dfrobot
```
login UNIHIKER terminal by typing the following command in Ubuntu terminal
```
ssh root@<IP address from step(2)>
dfrobot
```
5. setup mDNS by editing /etc/systemd/resolved.conf
```
vi /etc/systemd/resolved.conf
LLMNR=yes
MulticastDNS=yes
```
6. start mDNS
```
systemctl start systemd-resolved.service
systemd-resolve --set-mdns=yes --interface=wlan0
```
7. install python lib by typing the following commands (note: it takes around 30 minutes on UNIHIKER)
```
pip install circuits
pip install bleak
```
8. run unihiker-home-panel by typing the following commands
```
cd ~/src-unihiker
python main.py
```
if everything goes smooth, you should see the followings on UNIHIKER
SEEED XIAO ESP32S3 Sense lamp (Matter device)
1. follow the instruction on https://docs.espressif.com/projects/esp-matter/en/latest/esp32s3/developing.html# to install ESSPRESIF ESP32S3 development tool for developing Matter application
2. clone this repository by "git clone https://github.com/teamprof/build2gether-smart-home"
3. launch VS Code to open the folder "src-esp32s3"
4. click ep-idf "build, flash, monitor" icon on the bottom bar
If everything goes smooth, you should see the followings on VS Code Output:
5. type the following commands on the monitor terminal
```
matter device factoryreset
matter esp wifi connect <wifi ssid> <wifi password>
matter onboardingcodes onnetwork
```
6. if everything goes smooth, you should see the followings
7. launch a Ubuntu terminal and type the following commands to pair (note: replace \<wifi ssid\> and \<wifi password\> with your WiFi SSID and password)
```
chip-tool pairing onnetwork-long 0x7288 20202021 3840
```
8. if everything goes smooth, you should see the followings
9. reboot UNIHIKER, wait a couple seconds and you should see the following on the UNIHIKER screen
10. you can click the lamp icon on the upper portion, the LED connected to ESP32S3 Sense should be light on with sequence white -> yellow -> red -> off -> white -> …
11. ONLY the light onoff command is supported on the current version. type the following command to toggle the ESP32S3 LED via Matter protocol
```
chip-tool onoff toggle 0x7288 1
```
Nordic nRF52840 DK lamp (BLE device)
1. follow the instruction on https://docs.nordicsemi.com/bundle/nrf-connect-desktop/page/index.html to install Nordic development tool
2. clone this repository by "git clone https://github.com/teamprof/build2gether-smart-home"
3. launch VS Code to open the folder "src-nrf52840"
4. click nrf connect icon on the left panel
5. click "ACTIONS" -> "Build"
If everything goes smooth, you should see the followings on VS Code Output:
6. click "ACTIONS" -> "Flash"
7. launch a serial terminal and connect to nRF52840 at 115200, 8N1
8. click the "Reset" button on the nRF52840 DK
If everything goes smooth, you should see the followings on the serial terminal:
9. wait couple seconds, UNIHIKER should connect nRF52840 DK and you should see the followings on UNIHIKER screen
10. You can click the lamp icon on the bottom portion, the USB lamp connected to nRF52840 DK should be toggle on and off
High level code explanation
DFRobot UNIHIKER home panel
There are two libraries used in the Python code running on UNIHIKER. The first one is Circuits (http://circuitsframework.com/) for the application framework, and the second one is Bleak (https://github.com/hbldh/bleak/tree/master) for BLE.
In main.py, it spawns three tasks: AppGui, AppServerTcp, and AppClientBle for handling the GUI, WiFi/TCP connection, and BLE connection respectively. AppGui includes two components, LampEspWidget and LampNrfWidget, for controlling the ESP32S3 and nRF52840 respectively. Once user clicks the lamp icon in the widget, it sends an event to AppGui. AppGui forwards the event to main, which routes the event to AppServerTcp or AppClientBle for sending it via WiFi or BLE correspondingly.
SEEED XIAO ESP32S3 Sense lamp (Matter device)
The ESP32S3 application leverages ArduProf (https://github.com/teamprof/arduprof) library to provide a generic message communication framework between the main (QueueMain) and ThreadPanel. QueueMain handles Matter event for Google Home while ThreadPanel handles WiFi/TCP event for UNIHIKER. Once event is received, QueueMain/ThreadPanel routes it to LightDevice to proceed the actual lamp operations (e.g. off/white/yellow/red).
Nordic nRF52840 DK lamp (BLE device)
The nRF52840 application leverages ArduProf (https://github.com/teamprof/arduprof) library to provide a generic message communication framework between the MainTask and BLE callbacks. For example, once BLE LED characteristic is written, the "onLedChrcWrite" callback is involved and it sends an event to MainTask by "MainTask::getInstance()->postEvent(...)"
