Sonoff Switch

2018-10-22

Other projects

RS-232 D-Sub 9-polig pin layout

DE-9-Buchse

Die Farben beziehen sich auf ein vorhandenes, altes Kabel einer Maus.

RS-232 pin 2: Rx blue, position 4, receive data
RS-232 pin 3: Tx white, position 5, transmit data
RS-232 pin 4: DTR green, position 1, data terminal ready
RS-232 pin 5: GND brown, position 2, ground
RS-232 pin 7: CTS orange, position 3, clear to send, Sendeerlaubnis

Sonoff pin layout

!!! https://medium.com/@jeffreyroshan/flashing-a-custom-firmware-to-sonoff-wifi-switch-with-arduino-ide-402e5a2f77b

The Sonoff pins, starting from the push button:

pin 1: 3.3V
pin 2: Rx
pin 3: Tx
pin 4: GND
pin 5: GPIO14 (we won’t use this pin)

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