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Updated Armtronix Dimmers (markdown)

blakadder 2019-02-14 12:08:14 +01:00
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Armtronix-Dimmers.md

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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.
### For now only available in the development branch of the Tasmota firmware.
The device is supported since version [6.4.0](https://github.com/arendst/Sonoff-Tasmota/pull/4321) as ARMTR Dimmer `Module 56`
## Hardware
The 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. The dimmers contain extra connections (pin headers) for a 10K potentiometer. When this one is connected you get 10 step dimming of the lights which overrides the tasmota dimm level. This feature also works when the Tasmota firmware is non-functional, so it is nice as a fail safe feature. The setting of the potentiometer is fed back to the Tasmota firmware, so when the potentiometer dimmer is turned and the Tasmota setting overridden, the value in the Tasmota channel is representable of the dimmer value.