4CH I2C AC Dimmer Light Bulb SSR Smart Home Arduino Raspberry 110V 220V

4CH I2C AC Dimmer Compatible AC dimmable LEDs, AC LED dimmer
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4 CHANNEL AC LIGHT DIMMER 
CONTROL VIA I2C PROTOCOL 
Only 4 wires are needed to control this board ! 

DEVICE FEATURES: 
Compatible with any Arduino, Raspberry or microcontroller 
Dimming method - leading edge 
Current per channel - up to 3A 
AC Line autodetect function 
PCB dimensions - 140mm x 60mm 
Distance between holes: vertical 51mm, horizontal 131mm 
Mounting holes diameter: 3.2mm 
100kHz I2C bus interface 
I2C bus pull up switch on board 
I2C device address select switch on board 
50HZ LED - show detected AC 50HZ Line 
60HZ LED - show detected AC 60HZ Line 
BOTH LED Flashing - AC Line not detected 
Microcontroller on-board. No programming required!!! 
PCF8574 is used as I2C buffer 
SDA and SCL I2C pull up switch (pull upped with 5.6k resistors) 
I2C Device Address select switch 
Table in images show device addresses. Default address - 0x27 or 0x3F 
I2C-Bus Address scanner for Arduino - https://drive.google.com/file/d/0B6GJokXFb5oESUs5eDI1UFlMclE/view

Arduino demo sketch for I2C Slave address 0x27 - https://drive.google.com/file/d/0B6GJokXFb5oEWVBoaG1FTWlORkE/view

Arduino demo sketch for I2C Slave address 0x3F - https://drive.google.com/file/d/0B6GJokXFb5oETy1JcGRHUkUySEU/view

How to control board via I2C protocol? Only with 3 bytes! Please see images 
 Note: I recommend to use a EMI filter with this device. Connect it before AC INPUT. This board have pull-up switch for SDA and SCL lines. I2C-bus must be always pull-ups. If you use more than one device on I2C-bus - one device must be pull-ups and others not.

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