mirror of https://github.com/arendst/Tasmota.git
Added device information to tasmota wiki from personal fork
EphemeralPersistence
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# KingArt-N1 - Touch Light Light Switch
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This is a relatively cheap Premium glass fronted touch panel, looks clean and minimal when installed too.
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Table Of Contents:
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* [Device Features](#Device-Features)
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* * [Breakdown](#Breakdown)
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* * [Capacitive Touch IC](#Capacitive-Touch-IC)
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* [Re-Programming](#Re-Programming)
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* * [Tools](#Tools)
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* * [Setup](#Setup)
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* * [Programming Mode](#Programming-Mode)
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* [Reference](#Reference)
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***
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# Device Features
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* ESP8285 micro
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* Blue status LED (micro controlled)
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* Separate touch IC controlled switch status indicators (blue and red)
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* Confirmed 10A/250VAC mains relay
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-- Image: The 1 Gang Touch Panel, featuring the glass front (protective plastic film still on)
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### Breakdown
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Whats in the package... This looks like a reasonably simple setup.
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Removing the front glass panel you have access to the main control PCB. This holds the ESP8285 micro-controller and accompanying guff. I've worked through mapping most of the pins of interest - notes are in the images below.
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The control board runs off a 5V fed from the Power-Relay board at the read of the unit - a 3v3 reg is the control board for all the logic.
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The back of the control board has the touch controller and the 8way header to the Power-Relay board.
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There are only touch pads on the back of the control board as a means to interface with the microcontroller. **There is no SonOff type programming header arrangement.**, see [Re-Programming](#Re-Programming).
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* Control and Interface PCB
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_Sorry for the horrible pics.. will replace_
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* Some Application-Interesting Pin Allocations
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The Power-Relay board is reasonably simple as well.
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This board, being a 1-gang switch, only has a single relay - but the PCB is set out for 3 (again, see images for trace and pin notes ).
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* Power-Relay PCB
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### Capacitive Touch IC
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This board uses a dedicated capacitive touch control IC.
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Something interesting, that this IC manages touch switching as well a red and blue touch status LEDs for each of the touch pads that it services as the buttons.
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The IC illuminates a diffuser block over a 'button', indicating:
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* Blue : when Idle - button state is 'OFF'
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* Red+Blue : when Active - button state is 'ON'
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The TW8001 is also linked to a red error indicator led on the front of the Control Board - it is co-located above the EPS8285 microcontroller's Blue status indicator.
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This appears to be used by the Touch IC to indicate its own state information
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* eg, if the touch is held for +30s the touch shows an error state (red LED) and resets - useful if you replace the front panel and it needs to recalibrate.
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With regard to interfacing with the microcontroller, this device seems function with GPIO-friendly pin state for the capacitive button state reporting.
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Here is the only information I have been able to find on this device at the time of this investigation :
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[TechWave - TW8001](https://translate.googleusercontent.com/translate_c?depth=1&hl=en&prev=search&rurl=translate.google.com&sl=zh-CN&sp=nmt4&u=http://www.techwaveltd.com.cn/content/%3F43.html&xid=17259,15700021,15700124,15700186,15700190,15700201,15700237,15700240,15700248&usg=ALkJrhjd4Qk_rQGiJLNJdAEqSnQL1YG0mA).
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It does have much (or: any) in way of public datasheets.
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If anyone finds a datasheet please link it here!
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***
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# Re-Programming
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This should run with vanilla sonoff-tasmota.
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## Tools
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You shall need something in way of the following: (or whatever works for you, this is just my setup)
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* A USB-TTL adapter (TTL, 3V3.. something also with a 3V3 source)
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* Some leads
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* A soldering iron (solder, bits.. etc) - I'm going to assume you know how/what to do with this.
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## Setup
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(This is my setup)
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USB-TTL | Lead | Board
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3V3 Red 3v3
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TXD White RX
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RXD Grey TX
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GND Black GND
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NNB : **DO NOT USE or CONNECT THE 5V** ever..
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### Programming Mode
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Before you can program the board you **have to** start the ESP8285 micro in Programming Mode.
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This is important.
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Remember we soldered the blue lead to the board at (SW) - you will use this to force the micro to the required mode on startup. (you can only do this on startup)
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Entering Programming Mode:
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* Remove power from the board
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* Short the blue lead (SW) to ground (use a ground pad on the board or on your programmer)
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* NOW: Apply power. You can remove the short to ground after a second or two.
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#### So, Are we in Programming Mode? ...
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* **Test Failed** - try again
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If the board has its factory firmware installed still it usually flashes the status LED on startup.. (ie: not in programming mode)
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* **Test Success**
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If you have successfully put the micro into programming mode the ONLY the _blue status illumination of the touch pad_ will be ON.
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-> Now you can access and upload to the device using your preferred tool (Atom IDE, ESPtool, Arduino.. etc)
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# Reference
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https://github.com/EphemeralPersistence/Sonoff-Tasmota/wiki
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