Itead Sonoff T1

Property	Value
Manufacturer	Itead Studio
Web page	https://www.itead.cc/sonoff-t1.html
Wiki page
Build flag	ITEAD_SONOFF_T1_1CH ITEAD_SONOFF_T1_2CH ITEAD_SONOFF_T1_3CH

Introduction

The Sonoff T1 is a panel switch with touch control that comes in three "flavours": one gang, two gangs and three gangs. Its the evolution of the Sonoff Touch and includes a 433MHz receiver driven by a EFM8BB1 like the Sonoff RF or the Slampher. Pairing a remote is done the same way as with those two. Press and hold any of the touch buttons until the unit double beeps and then press the desired button in your remote.

The devices comes in EU, UK and USA versions that differ in the form factor. Each gang is a SPST relay, thus no 3-way switching is available with the original configuration. You can, of course, use a 2CH to simulate a 3-way switch using the synchronizing feature in ESPurna.

GPIO	1CH	2CH	3CH
0	Button #1	Button #1	Button #1
1	TX	TX	TX
2	Available in header	Available in header	Available in header
3	RX	RX	RX
4			Relay #3
5		Relay #2	Relay #2
9		Button #2	Button #2
10			Button #3
12	Relay #1	Relay #1	Relay #1
13	LED (inversed logic)	LED (inversed logic)	LED (inversed logic)

Flashing

To enter flashing mode the main board should be disconnected from the rear relay to prevent power drain that will cause the ESP to reset often while flashing. Then connect your programmer to the 4-pin header (use 3V3!!!). To enter flash mode button 1 (check pictures above) should be held while reset button (number 4 in picture above) is pressed. Once in flash mode you can release button 1.

The Correct Sequence for putting the board in Programming Mode

1. Hold Main Button (No 1)
2. Press Reset Button (No 4)
3. Release Reset Button (No 1)
4. Release Main button (No 4)

For the new version T1 R2 EU for enter flasing mode you have to connect GPIO0 to GND before powering up the device, you can release after a moment of power up, and then flash the device. The prior sequence of buttons doesn't work in this new version.

Issues

Since it uses touch panel the best experience requires a different approach to button definitions. This is the definition for button 1 for Sonoff T1, as you see the event is fired on press (not on release) and most of other events are disabled.

#define BUTTON1_MODE        BUTTON_PUSHBUTTON | BUTTON_DEFAULT_HIGH
#define BUTTON1_PRESS       BUTTON_MODE_TOGGLE
#define BUTTON1_CLICK       BUTTON_MODE_NONE
#define BUTTON1_DBLCLICK    BUTTON_MODE_NONE
#define BUTTON1_LNGCLICK    BUTTON_MODE_NONE
#define BUTTON1_LNGLNGCLICK BUTTON_MODE_RESET