Sonoff Mini OTA Tasmota Conversion (Legacy)

Preinstall Setup

Verify and/or update eWelink firmware version
If quick pairing doesn’t work, use alternative pairing method
Download the Sonoff DIY tool_01DIY85 from Github
Install the DIY Jumper
Modify your PC configuration to provide a Mobile hotspot:
SSID: sonoffDiy (case sensitive!)
Password: 20170618sn

Flash Initial Firmware

Start the tool_01DIY85 utility and select firmware flash
Select a Tasmota binary (e.g., tasmota-wifiman.bin) or your own self-compiled binary. It must fit in the available free program space. You can use the 2.3.0 Core for this initial flash since it has the smallest program memory footprint. Do NOT use the tasmota-minimal pre-compiled binary as it does not allow you to change any settings.
Quit DIY mode tool
Stop mobile hotspot
Power off the device and remove DIY jumper as it is no longer needed and might interfere with future Tasmota features that use GPIO16

Post Installation Setup

Set up Wi-Fi to connect your device to your network
Perform a Reset 5 to wipe any flash remnants BEFORE attempting a Tasmota OTA flash for the first time
If you flashed tasmota-wifiman.bin, it is recommended that you upgrade to the firmware and Core variant that is needed for your device and use case (e.g., tasmota.bin). You must perform this update using the local File upload OTA. Do not use a web OTA for this step. Download the firmware file from the repository to your computer.Some users have reported that upgrading via web OTA from tasmota-wifiman.bin to another binary has resulted in an unresponsive device which has required a wired flash to recover.

Configuration Details

Once the desired firmware is on the device, continue the regular Tasmota setup process. Use the the appropriate Template from the repository to assign the device components to the GPIO pins. For example, the Sonoff Mini template assigns these GPIO:

GPIO	Tasmota Component	Device Function
0	Button1 (17)	Button
4	Switch1 (9)	S1/S2
12	Relay1 (21)	L Out
13	LED1 (56)	Link/Power Indicator

Sonoff Mini Relay

GLOBAL

GPIO #	Component
GPIO00	Button1
GPIO01	None
GPIO02	None
GPIO03	None
GPIO04	Switch1
GPIO05	None
GPIO09	None
GPIO10	None
GPIO12	Relay1
GPIO13	Led1i
GPIO14	None
GPIO15	None
GPIO16	User
FLAG	None

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

Several free GPIO 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)

References

Video tutorials

Last Updated OnDecember 31, 2020

byHAS_MasterWP

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