In this instructable i'll show you how to build a very inexpensive wireless switch for Phillips Hue Lights.
These lights needs permanent power supply, wall switches have to be always on.
If you go to bed and turn off the wall switch the light will never shine again if the hue bridge try to switch on the light, for example in the morning to wake up you softly with a "warm light".
You have to buy the Hue Tap or dimmer switches, which are very expensive, especially if you need one for each room.
The solution is the using of an ESP8266. These tiny controllers with inbuild usb adapter are available for less than 3$. For the power supply you only need 2 pcs. AAA battery, by using the DeepSleep modus of the Esp8266 the battery work for a long time.
Everytime you press the reset button the ESP wake up, connect with your WLAN, get the status of the lamp, if it is on it switches off or vice versa, after this command it falls into deep sleep
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Step 1: What You Need
There are two different PCBs with Esp8266 and inbuild usb-adapter for simple programming:
- Wemos D1 mini, very small, with USB
- NodeMCU, not so small, with USB
Holder for 2 Micro cells (AAA), solder tags
- 2 pcs. AAA cell alkaline
- small screw 2x8mm, see picture
- 3D printed case(see STL files next step)
- a housing from an old remote control (see picture)
- place the Esp and battery behind a wall switch button
Step 2: Housing
If you an owner of a 3D Printer, then simply use the attached STLs, you even don't need an extra button, we use the onboard reset button with a 3D printed cap.
Another solution is an old remote control.
If you want to replace the wall switch with a button switch and the Esp you have to shortcut the 2 wires and ISOLATE them so that the Lamp got continous current.
!!!!!! BE AWARE OF ELECTRICAL SHOCK; YOU HAVE TO KNOW WHAT YOU DO !!!!!
Step 3: Coding the Esp8266
First you need the Arduino IDE.
After opening the attached sketch with the Arduino IDE you have to do some settings depending to you local WIFI.
For a faster connecting/switching we use a static ip adress.
ip adress of you local wifi router where the hue bridge is connected
IPAddress ip(192, 168, 178, 216);
Ip adress of your switch, be aware of using a high adress in the range of 200-250 that is not used for other devices
int light = 2; //
the number of your light that is switched
const char hueHubIP = "192.168.178.57";
the ip adress of the hue bridge
const char hueUsername = "hue bridge username"
you have to create an authorized username in the hue bridge, look at this tutorial
const int hueHubPort = 80;
const char ssid = "SSID"; // network SSID (name)
const char pass = "password"; // network password
finally SSID and password of your wifi
After changing these settings you are ready for upload !
Step 4: Schematic
The schematic is very simple, you only have to connect the battery holder to GND and 3V3.
The use of an external button is optional.
Step 5: Additional Infos
To reduce the power consumption it is necessary to remove the voltage regulator.
Measure the current before and after removing, the current in deepsleep has to be less than 0,1mA.
Sometimes you also have to remove the supply pin from the UART chip. See here for more infos.