IoT - Sinilink XY-WFUSB

• $5 Sinilink WiFI USB Power Switch Works with Tasmota Firmware, Supports up to 20V/5A
• scargill - AliExpress Sinilink WIFI USB Controller
• blakadder - Tasmota Template

	3v3
	RST
	GPIO-0
	RX
	TX
	GND

Unlike the Sonoff Micro, The Sinilink actually feeds the data pins through.

Also, It's an ESP8285, so it can be flashed with Tasmota!!!

NOTE: The housing on the female USB connector is NOT grounded. This is important if you decide to attach a wire to GPIO-0 on the little contacts & ground it for booting to flash-mode. (No need to ask how I learned this...)

Adventures in careful work

I bought 2 of these a while back & took a long time to work up the nerve to flash them.

Rather than go hunting for 1.27mm pitch pin headers or tiny little pogos, I soldered 30AWG wire-wrap pigtails in the holes. Then I used my prototype ESP-Everything! programmer on them.

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In the process, I discovered that the button doesn't seem to be on GPIO-0... So I went back & added wires to GPIO-0 & RST. (Then found out about the non-grounded connector)

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Eventually tho... Got it working.

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W00t!

Some thoughts

There has been discussion about whether this sort of device is actually useful.

I've found a good reason to have at least one.

I've plugged my programmer through one into my dev machine. I can now disconnect the programmer without physically unplugging it.