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Wouter 2018-11-16 10:23:46 +01:00
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Armtronix-Dimmers.md Normal file

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# Armtronix Dimmers
There is a small company making dimmers in about the same formfactor as a sonoff dual and single. These [Single](https://www.tindie.com/products/Armtronix/wifi-ac-dimmer-esp8266-one-triac-board-alexaecho/) and [Dual](https://www.tindie.com/products/Armtronix/wifi-ac-dimmer-two-triac-board/) dimmer boards have open source firmware.
## Hardware
These dimmers contain an ESP8266 for the wifi connection and an Atmega328 which monitors the mains frequency and dimm the lights using a triac and phase controlled dimming. Communication between the two is done using the serial port at 115200 baud.
## WARNINGS
[Phase dimming](https://www.ecmweb.com/lighting-control/shining-light-dimming) is not for all lights. Most incandescent bulbs will work, but for LED and CCFL bulbs you will need the special dimmable versions of these lights. The large Blue/Yellow Swedish furniture store has some nice ones.
Because these dimmers come in a small package, they lack a bit on the safety and interference side. A good idea would be to add a 1A fuse in the AC line and a R/C Snubber on the output. I also read somewhere that they work less well on 110VAC but this could probably be solved using a firmware update.
## Software
For now, to use these dimmers you need to take it apart and flash new firmware to the ESP8266 and the Atmega328p using the Arduino IDE. The whole process is quite well documented for the [single](Wifi-Single-Dimmer-Board/Wifi-Single-Dimmer-Board/Document/A0004_Wifi_One_Dimmer_1A_Board.pdf) and [dual](Wifi-Two-Dimmer-Board/Doc/WiFi-Two-triac(SMD).pdf) dimmers. But you do need a USB to serial bridge, at best one with the DTR and RTS signals broken out as well.