HTTP esp8266 Lamp

HomeKit support for your not so smart lamp.

OK, thats not exactly true. With this, you won't gain any HomeKit functionality without any further steps, but it acts as an interface to HomeBridge (official website). I addition to homebridge, you need the extension homebridge-http and homebridge-http-temperature-humidity.

Features (what you get)

• HTTP communication
• OTA (Over the Air) Updates
• smooth brightness, hue and saturation changes
• temperature & humidity data
• ability to control RF devices
• offline mode
• wall switch support
• mqtt support (currently in testing)
• dimming curve optimized
• states and values in permanent memory
• party mode (strobe light)
• multi wifi support
• Alexa support

Instructions

!Attention! PINs of the device are mapped for WittyCloud. You may have to change them for other devices. NodeMCU is also fine. Don't forget to fill in your network SSID and password, otherwise it can't connect to it.

OTA Update

Web browser: http://server_ip/ota

Terminal: curl [-v] server_ip/ota

To upload a new version of the sketch, call http://server_ip/ota via a Web browser or curl [-v] server_ip/ota in Terminal first... this will set the ESP8266 in OTA Mode

Required hardware (what you need)

• esp8266 (-12F) - I bought the WittyCloud from AliExpress, because I was too lazy to solder. I am sure the NodeMCU is supportet too, but you have to take care of the pin mapping
• led strips - I went for el chepo ones from ali
• 2x MOSFET - I believe... not sure which type or specification; found them somewhere in my house
• power supply - obvious, but I write it down for documentation
• some cables - the bar is very low at the moment
• breadboard - bar = still low
• 1x DHT22 - the bar rises; definately from ali again
• 1x 433MHz RF transmitter - do I have to say where I got them from?
• 1x relay - this one is not from ali, but I was only a few clicks away from buying

Costs

Item	Description	Price	LINK
esp8266 (WittyCloud)	NodeMCU is also possible	~2.5$	LINK
LED light strip	Warm and cold white	~5-10$	LINK
MOSFET	don't have the specs right now	0$	LINK
DC Power supply	had one at home (6A?)	0$	LINK
Jumper wires	had several at home	0$	LINK
Breadboard	had one at home	0$	LINK
DHT22 (AM2302)		~2.5$	LINK
433Mhz RF transmitter		~0.5$	LINK
Relay		0$	LINK
	Total	~15.5$

The total will be higher if you don't have some parts laying around. Remember: AliExpress is your friend, but don't expect it to be delivered within one month.

I made this documentation for myself, not because I need it, just because I was bored and had nothing else to do.

Available URIs

General

• http://[server_ip]/lamp/party/on
• http://[server_ip]/lamp/party/off
• http://[server_ip]/lamp/party/freq/[int]
• http://[server_ip]/lamp/test/255
• http://[server_ip]/lamp/test/1023
• http://[server_ip]/log
• http://[server_ip]/ota
• http://[server_ip]/ota/false
• http://[server_ip]/restart

Homebridge URIs

• http://[server_ip]/lamp/off
• http://[server_ip]/lamp/on
• http://[server_ip]/lamp/hue/[int]
• http://[server_ip]/lamp/sat/[int]
• http://[server_ip]/lamp/lvl/[int]
• http://[server_ip]/lamp/status/io
• http://[server_ip]/lamp/status/hue
• http://[server_ip]/lamp/status/sat
• http://[server_ip]/lamp/status/lvl
• http://[server_ip]/dht
• http://[server_ip]/rf1/off
• http://[server_ip]/rf2/on
• http://[server_ip]/rf3/status/io

Todo

Here are some ideas for leftover times in the future:

• rf receiver
  • receive command from rf remote
• second lamp
  • ability to control (brightness, hue, saturation)
• web interface
  • serial monitor
    • debugging via webinterface
  • general dashboard
  • ota upload - SPIFFS
• json parser & stringify
  • configuration to external json file
• daylight
  • change light temperature during day
• motion detector
• alarm
  • synchronize via ifttt