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Thank you everybody for your time trying to help out.

What I mean to say here is that esp-open-rtos works just fine at this moment. As soon as I flash it with Espruino I encounter the wifi problem.

@MaBe I've already tried changing to b/g/n - doesn't improve anything.

Hello @MaBe,
I did and it does the same thing - returns an empty array.

>require("Wifi").scan(function(arrayOfAcessPoints){print(arrayOfAcessPoints);});  
=undefined
[  ]

Ordered 3 Wemos d1 minis from different suppliers. Will see how they perform while this remains a mystery...

Enabled WiFi logging

>esp8266.printLog()
89478> wifi.on(#ondisconnected)
 89575> reconnect
 91698> scandone
 91699> no simple found, reconnect after 1s
 91699> Wifi event: disconnected from ssid simple, reason beacon_timeout (201) status=no_ap_found
 91702> wifi.on(#ondisconnected)
 91799> reconnect

Nothing terribly useful. Just checked Micropython on this board - WiFi works great.

@Ollie do you mean shorting the antenna connector? Tried that out of desperation and also flashed espruino_1v85_esp8266_combined_512.bin - issue remains.

Yes - the WiFi details are correct. "simple" is the actual SSID and also is the password. I did try your code snippet.

I would like to point out, that WiFi credentials get set properly:

>wifi.getDetails()
={
  "status": "no_ap_found",
  "ssid": "simple",
  "password": "12345678",
  "rssi": 0, "savedSsid": null }

Looks like it's unable to use the radio at all somehow.

>wifi.scan(function(ap){print(ap);});
=undefined
[  ]
>var esp8266 = require("ESP8266");
=function () { [native code] }
>esp8266.printLog()
292141> reconnect
294267> scandone
294267> no simple found, reconnect after 1s
294367> reconnect
296493> scandone
296493> no simple found, reconnect after 1s
296593> reconnect
298717> scandone
298717> no simple found, reconnect after 1s
298817> reconnect
=undefined
> 

Oh dear what a riddle.

@Wilberforce I have added the antenna - getting the same result. esp-open-rtos works fine with and without the antenna though.

@CrashingDutchman It's being powered through USB out of my laptop - same power source as with esp-open-rtos. Just tried powering it with 12V 1A adapter - didn't see any improvement. Also erased and re-flashed using the new power source.

What else can we try? :D

Here's what it does after wifi.connect():

>esp8266.printLog()
988179> reconnect
990305> scandone
990305> no simple found, reconnect after 1s
990405> reconnect
992531> scandone
992531> no simple found, reconnect after 1s
992632> reconnect
994758> scandone
994758> no simple found, reconnect after 1s
994858> reconnect
=undefined

At least it's trying... Okay.

>wifi.scan(function(ap){print(ap);});
=undefined
[  ]
>
>esp8266.printLog()
 74724> mode : sta(5c:cf:7f:de:6a:74)
 74725> add if0
 76851> scandone
=undefined

Compiled my own firmware from latest source - same result.
Also, wifi.scan() returns an empty object. I have a few APs around for sure.

>wifi.scan(function(ap){print(ap);});
=undefined
[  ]

Tried with esp_init_data_default.bin at 0x3FC000 and without it. I'm also erasing before every flash.

Hello,
I'm having trouble with this neat little board.

WiFi is not working at all neither in AP nor STA mode. I have tried both v91.545 and v91 stable - getting the exact same result. Wifi works just fine using esp-open-rtos under 80 and 160 Mhz

Attempting to connect to my router:

var wifi = require("Wifi");
wifi.connect("simple", {password:"12345678"}, function(err) {
    console.log("connected? err=", err, "info=", wifi.getIP());
});

It says "no_ap_found" and callback does not execute. getDetails() does say "connecting" for a brief moment.

>wifi.getDetails()
={
  "status": "connecting",
  "ssid": "simple",
  "password": "12345678",
  "rssi": 0, "savedSsid": null }
> 
>wifi.getDetails()
={
  "status": "no_ap_found",
  "ssid": "simple",
  "password": "12345678",
  "rssi": 0, "savedSsid": null }
>
>wifi.getStatus()
={
  "mode": "sta+ap",
  "station": "no_ap_found",
  "ap": "enabled",
  "phy": "11n",
  "powersave": "ps-poll",
  "savedMode": "off"
 }

Strangest of all, AP callback does execute, but the actual AP is not visible by any device.

>wifi.startAP("test", {authMode:"open", channel:6}, function() {
    console.log("started AP.");
});
=undefined
started AP.
>
>wifi.getAPDetails()
={
  "status": "enabled",
  "authMode": "open",
  "hidden": false, "maxConn": 4,
  "ssid": "test",
  "password": "",
  "savedSsid": null,
  "stations": [  ]
 }

Flashed with:

esptool.py --port /dev/ttyUSB0 --baud 115200 write_flash 0x0000 "boot_v1.6.bin" 0x1000 espruino_esp8266_user1.bin 0x3FC000 esp_init_data_default.bin 0x3FE000 blank.bin

I've tried "cpuFrequency": 80 too.

>esp8266.getState();
={
  "sdkVersion": "2.0.0(5a875ba)",
  "cpuFrequency": 160, "freeHeap": 10224, "maxCon": 10,
  "flashMap": "4MB:512/512",
  "flashKB": 4096,
  "flashChip": "0xef 0x4016"
 }

I am hoping this is only me doing something wrong or not doing something :D Will try out some older BINs and report back. Please advise on what else we could try.

I really appreciate your effort in this project - it is one of very few I donated to.

The bastard:

32Mb, $5