{"NAME":"Sonoff Mini","GPIO":[17,0,0,0,9,0,0,0,21,56,0,0,255],"FLAG":0,"BASE":1}

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Alternative template where the blue LED lights up only in case of connection issues and on button actions:

{"NAME":"Sonoff Mini","GPIO":[17,0,0,0,9,0,0,0,21,158,0,0,255],"FLAG":0,"BASE":1}

The Sonoff Mini is, as the name implies, a very small device, designed to be hidden where there’s only supposed to be cables. Since it’s not supposed to be visible, it’s also designed to easily attach an external button.

Tasmota can be flashed on this device via OTA using the Sonoff DIY feature.

Serial Flashing

Several free GPIOs are available. The OTA jumper pin is the most accessible and very easy to use on a pin header.

GPIO	Description
0	Button
1	TX
2	Available
3	RX
4	S2 (external switch input)
12	Relay and red LED
13	Blue LED
16	OTA jumper pin
GND	S1 (external switch input)