An RGB(W) control on ESP32 with webinterface and MQTT status replies.
This RGB control can be used with different domotica systems.
There are 3 ways to control this ESP32 device with an url, with a webbrowser and through MQTT.
The last set colours is stored in EEprom after a start up, it will return to last colour. With the timers you can switch off and on and change colours at preset times.
With the few parts you have full IoT control over your RGB devices for less then EUR 15.00
Once you have uploaded the sketch just find "Esp32_SetUp" in your networks and connect. Then open your browser and enter 192.168.4.1 here you select the Wireless Network you want to use and the password. After clicking send and the confirmation the ESP will restart.
On a mobile device you can use fing on Google Play or Apple iTunes to find the IP address given to the ESP32.
It is an Arduino project however I choose to build in on visual studio code with the PlatformIO extension.
Board: DOIT ESP32 DEVKIT V1, 80Mhz, 4MB(32Mhz),921600 None op COM3 Available at Banggood
PowerSupply(1): 5 Volt Available at Banggood
PowerSupply(2): 12 Volt Available at Banggood
4x MosFet IRFZ44n Available at Banggood
| Led | GPIO | |
|---|---|---|
| Red | -> | GPIO 4 |
| Green | -> | GPIO 19 |
| Blue | -> | GPIO 22 |
| White | -> | GPIO 23 |
| Date | Version | Description |
|---|---|---|
| 27th August 2018 | 0.9.5 | Added switching using MQTT |
| 26th August 2018 | 0.9.4 | Added 3 timers for easy automatic switching |
| 25th August 2018 | 0.9.3 | First fully working version |
| 24th August 2018 | 0.8.2 | Added support for setup by direct AP connection to ESP32 and connect to MQTT |
| 21th August 2018 | 0.8.1 | Added Range sliders in user interface |
always use closing /
| request | extra information |
|---|---|
| http:{ipaddress}/command/on/ | To latest colour |
| http:{ipaddress}/command/off/ | |
| http:{ipaddress}/command/color=255,128,64,32/ | For decimal data (also only RGB 255,128,64) |
| http:{ipaddress}/command/hex=FFEEDDCC/ | For hex data (also only RGB HH0A11) |
| http:{ipaddress}/command/red=255/ | For colours red, green, blue, white (0 to 255) |
always use closing /
| request | extra information |
|---|---|
| http:{ipaddress}/api/command/on/ | To latest colour |
| http:{ipaddress}/api/command/off/ | |
| http:{ipaddress}/api/command/color=255,128,64,32/ | For decimal data (also only RGB 255,128,64) |
| http:{ipaddress}/api/command/hex=FFEEDDCC/ | For hex data (also only RGB HH0A11) |
| http:{ipaddress}/api/command/red=255/ | For colours red, green, blue, white (0 to 255) |
With MQTT you must publish a JSON Object. Standard subscribe for the ESP is set to esp/in. You must use this format. If all the colours are set to 0 the RGBw strip is off.
Important set QoS to 1 or 2 when sending and retain false; (if retain is true the subscribed message comes in on ever resubscribe)
/*
{"payload":{"colours":[{"red":255,
"green":128,
"blue":64,
"white":32}]}}
*/
/*
{"error":false,
"status":"OK",
"message":"LED Blue set to: 129",
"colours":{"red":0,
"green":0,
"blue":129,
"white":0},
"updated":{"time":"14:11:45",
"eeprom":"Data has been updated",
"version":"0.9.3"}
}
*/
/*
esp/out {"device":"ESP32 0.9.x",
"sType":"RGB Control",
"time":"14:11:45",
"colours":{"r":0,
"g":0,
"b":129,
"w":0}
}
*/
If you change a value with one the slider also the color in the colour picker will be updated and vice versa. The change WiFi button brings the ESP in Acces Point mode. If you don't enter a password and send
you need to restart the ESP to exit AP mode.
If you don't enter a password and send you need to restart the ESP to exit AP mode.
If your password is not stored it will go back in AP mode until a valid password/ssid combination is entered.
With timers you can switch the RGB at preselected times. Be sure you have a ntp server for your time area. (line 20 main.ino)
Coming soon before 30th August 2018