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Updated Sonoff 4CH (markdown)

Thomas Dietrich 2017-06-24 01:26:32 +02:00
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Sonoff-4CH.md

@ -9,12 +9,15 @@ Other than most Sonoff modules (ESP8266) the Sonoff 4CH is based on the ESP8285.
Please see the [Hardware Preparation](https://github.com/arendst/Sonoff-Tasmota/wiki/Hardware-Preparation) page for general instructions.
As always, you need to access the serial interface. The **four serial pins** (3V3, Rx, Tx, GND) can be seen in the first picture. *Attention:* The printed labels on the PCB for Rx and Tx are incorrectly swapped.
The Sonoff 4CH features four hardware buttons of which one is already connected to GPIO0, which hence can be used to bring the module into [Programming Mode](https://github.com/arendst/Sonoff-Tasmota/wiki/Hardware-Preparation#bringing-the-module-in-flash-mode). The button is shown on the second picture.
As always, you need to access the serial interface. The **four serial pins** (3V3, Rx, Tx, GND) can be seen in the first picture.
*Attention:* The printed labels on the PCB for Rx and Tx are incorrectly swapped as can be seen on the image.
<img title="Sonoff 4CH serial connection pins" src="https://github.com/arendst/arendst.github.io/blob/master/media/sonoff4ch_pins.jpg" width="48%" />
<img title="Sonoff 4CH GPIO0" src="https://github.com/arendst/arendst.github.io/blob/master/media/sonoff4ch_gpio0.jpg" width="40%" align="right" />
The Sonoff 4CH features four hardware buttons of which one is already connected to GPIO0, which hence can be used to bring the module into [Programming Mode](https://github.com/arendst/Sonoff-Tasmota/wiki/Hardware-Preparation#bringing-the-module-in-flash-mode). The button is shown on the second picture.
## Solving OTA and Upload Problems
Where most Sonoff's are ESP8266 based the Sonoff Touch and Sonoff 4CH are based on the ESP8285.