Wifi Not connecting on Wemos D1 R2, mini and mini pro

[martin072]

I Have a couple of wemos devices (Wemos D1 R2 and a Wemos Mini) and the all run a piece of code fine.

I recently got some wemos mini pro's, but when loading the same s/w on to it, it won't connect to the wifi network.

I tried moving closer to the router, no joy.
Flashed it with a wifi scanner, and noticed my network doesn't pop up in the list.. not even when I move close..

Any idea's?

-- Logging from the wemos --
Connecting to UPC643521
....wifi evt: 1
STA disconnect: 201
....wifi evt: 1
STA disconnect: 201
.....wifi evt: 1
STA disconnect: 201
....wifi evt: 1
STA disconnect: 201
.....wifi evt: 1
STA disconnect: 201
....wifi evt: 1
STA disconnect: 201
....wifi evt: 1

[martin072]

Other Update.. Running the module in Soft AP does broadcast the SSID, but unable to connect to it..
Could this be related to non-original wemos modules (ie. this one is from AliExpress)?

-- UPDATE --
Now my Wemos D1 R2 won't connect to an WiFi AP either? Help..

Serial debug output:

Connecting to: UPC643521
state: 5 -> 0 (0)
rm 0
del if0
usl
mode : null
mode : sta(60:01:94:33:00:c0)
add if0
f r0, ...scandone
state: 0 -> 2 (b0)
.state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 1
cnt
.....state: 5 -> 2 (2a0)
rm 0
..reconnect
state: 2 -> 0 (0)
f r0, scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 1
cnt
......state: 5 -> 2 (2a0)
rm 0
.reconnect
state: 2 -> 0 (0)
f r0, scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 1
cnt
......state: 5 -> 2 (2a0)
rm 0
.reconnect
state: 2 -> 0 (0)
f r0, .scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 1
cnt
.....state: 5 -> 2 (2a0)
rm 0
..reconnect
state: 2 -> 0 (0)
f r0, scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 1
cnt
......state: 5 -> 2 (2a0)
rm 0
.reconnect

[5chufti]

Does the WiFi scanner show any other networks?
Is your network on 2.4GHz? On a channel <=12 ?
Is your AP configured to show SSID?

[aslake]

I have the same problem with my Wemos D1 mini pro boards.
The Wemos SSID only appears when the softAP is set without password, but I cannot connect to it.
I have tried several wifi channels below 12...
Same code works perfectly fine with Wemos D1 mini boards... Then also works fine with hidden SSID and for wifi-channels 1-14.

[martin072]

Yes it sometimes shows up in the scanner, it appears and disappears. It is running on 2.4Ghz indeed.
When I try a D1 R2 board it works fine instantly. I am thinking this could be caused by a Wemos Mini Pro clone? I noticed they don't carry the wemos logo on it... I've ordered an official wemos mini pro, see if it makes a difference..

[d-a-v]

If you have a magnifier or a multimeter, you could check the antenna connection ?

[martin072]

It’s on the internal antenna.

[d-a-v]

I meant the soldering points of the internal antenna. With esp powered off and with a digital multimeter, you can check if the wire is continuous (if things are accessible)

[beastgrim]

I bought 4 pcs Wemos D1 Mini Pro clone and I have the same trouble ((
Does anyone know at least some way to make them work?
Thanks!

[pieman64]

@beastgrim quite a few bugs in the latest Core release and we are eagerly awaiting the next release that has the fixes. Try rolling back to the very buggy, but usable 2.3.0 or use Git with the master branch.

[ThomasQvist]

I experience the same problems with running the Wemos D1 Mini pro as an AP.
(No problems with the same software on a "non-pro" Wemos)
The signal fluctuates (signal measured with the excellent vistumbler)

Sometimes I am lucky and can connect to the access point (I expect that I need a connection for a couple of seconds to make the actual handshake).
I see no change in the measured signal whether I setup the Wemos AP to run with or without password - - but I might be that the handshake is faster without password - and therefore it works a little better.

I have full connection to the wemos (over serial) and I get no error code or any other diagnostics.

Also note that I have not seen any problems connecting the Wemos D1 Mini Pro to a wifi-network - it is only the AP-functionality that is giving me problems

[igrr]

@ThomasQvist make sure you are running it in AP mode only. Check that you have WiFi.mode before calling WiFi.softAP:

  WiFi.mode(WIFI_AP);
  WiFi.softAP(ssid, password);

It the chip is in STA+AP mode, then the station will be trying to scan for a network to connect to, and since scan covers multiple channels, the AP will not be on the desired channel for some percentage of total time. This might explain the behavior you are observing.

[martin072]

Small Update, I ordered an official Wemos Mini Pro, and unfortunately the same results. I am not able to connect to my Local home WiFi, where as the regular wemos don't have any issues at all..