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Sonoff USB Micro doesn't pair

I got two pieces of a brand new product: Sonoff Micro.

I am now trying to pair Sonoff Micro with eWeLink, and both devices fail to pair with my Android eWeLink 3.14.1. Other Sonoff devices pair without problems.

After connecting to USB, both devices LED flashes quickly for 3 minutes.

When trying to pair with QR, I get:

Connect device ✓

Get device info

And it fails: Pairing failed, Cannot find device

When trying Quick pairing or Compatibility pairing, both of them find the device, but then the pairing never finishes.

When trying to connect manually to the Sonoff WiFi, there is a problem: eWeLink says that I should use password "12345678". But both my Sonoff Micro have open AP without password.

Clicking to Network diagnostics show three times OK.

I tried to debug the problem, and it seems that Sonoff USB Micro is sold with a different firmware incompatible with eWeLink.

Other devices in Compatibility mode create a WiFi AP with password 12345678, with IP addresses (Sonoff) and (phone). After running eWeLink, I see the device connection to my router. returns JSON with deviceid, apikey, accept and chipid chunks.

But both Sonoff Micro devices behave differently: they create an open AP without password, with IP addresses (Sonoff) and (phone). I see no attempt to connect to my WiFi router after running eWeLink. returns JSON with "data" chunk only.

{"data":"IcE6R ... long string skipped ... O2x"}

Is anybody else experiencing the same problem? How to proceed? I already opened a ticket, but I don't have any reply yet.

2 people have this problem

Hi Stanislav, 

Did you ever resolve this issue?  I received my Sonoff Micro today and I am having exactly the same issue as you.



No, I did not resolve it. I am still waiting for the reply from Itead. They asked for video 1 month ago. I sent it. Now I am waiting for their reply. Ticket #438951.

Terrible support.


Just thought I would let you know I managed to get my device to connect.  I removed or forgot all the wireless networks on my phone and connected only to my 2.4ghz network.  I could then add the device and once connected I re joined my 5ghz networks.

Good luck :)


Well, I was able to connect as well. The hardware itself works. But even after manual pairing, eWelink refuses to register the device.

I am having exactly the same problem. I am able to connect with the device but it stalls while trying to get the device info. Hopefully the solution is just a simple app update.

I did not solve my issue. There is no new eWeLink version in my Google Play. My one is 3.14.1 dated 2019-12-16. Which version do you have?

I am using the same version 3.14.1. Not sure if the device matters but mine is a Pixel 3XL, although I can't see that being an issue.



Ich habe 5 dieser USB-Mikroschalter. Ich konnte 3 problemlos mit dem QR-Code koppeln, es dauerte keine 30 Sekunden. 2 Ich konnte keine Verbindung herstellen, ein Gerät enthält einen falschen QR-Code und ich habe gleich zu Beginn versehentlich einen weggeworfen. -Diese beiden Geräte sind jedoch nicht mit der Schnellverbindung gekoppelt, und andere Methoden waren ebenfalls nicht erfolgreich: /

The best thing you can do is to pair using the supplied QR Code.

To pair, turn on your SONOFF MicroUSB, press for five seconds to enter pairing mode, and quickly pair using QR Code.

Administrator: I tried QR code and button many times. It connects (see above, the first comment), but it fails to get device info and does not register into eWeLink.

I strongly suspect that my Sonoff Micro USB was preloaded with a different/testing/preliminary firmware, not compatible with eWeLink, as these devices behave differently, and it indeed does not return device info.

Other Sonoff devices and Sonoff Micro USB according to manual:

Use WiFi password 12345678

My Sonoff Micro USB:

Uses open WiFi without any password

And even the communication protocol is different:

Other Sonoff devices return to following JSON data:

{"deviceid":"some identificator"...}

Sonoff USB Micro returns to

{"data":"IcE ... long string ... O2x"}

There is no deviceid, no apikey, no accept and no chipid.

The device also behave erratically under AC router. Do disable the 5GHz spectrum on your AP and try to pair.

Administrator: I have no 5GHz spectrum on my AP. And as the device connects to the AP, it has nothing to do with AP frequencies.

I just got a reply to my ticket. They write that it is a problem of the eWeLink application, and eWeLink V4.0 will fix it.

Going from 3.1x to 4.x is quite a huge number jump in versioning. Might be to support their new products as well.

I just upgraded to version 4.0.2 from a Chinese store (Google Play does not offer it for my device yet.) I had no success. I am starting to suspect that the manufacturer left a testing firmware on my preorder devices from the first batch, and I have no chance in eWeLink. I seen a video on Youtube, and people had no problems even with the old version.

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