RobotDyn D1 R2 ESP8266 - WiFi not working (AP and STA)

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