Wemos D1 mini pro crashing with wdt on enabling wifi

Using Arduino Microcontrollers
1

Hello

I have this board https://www.aliexpress.us/item/3256803497731255.html?spm=a2g0o.order_list.order_list_main.5.18751802hrOwAs&gatewayAdapt=glo2usa&_randl_shipto=US the 16MB version.

When testing the board with this simple sketch:

#include <ESP8266WiFi.h>
#include <WiFiClient.h>

void setup() {
  Serial.begin(115200);
  Serial.println("---- SETUP ----");

  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);

  WiFi.disconnect();
  WiFi.mode(WIFI_STA);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);   // Arduino: turn the LED on (HIGH)
                                     // D1 Mini: turns the LED *off*
  delay(250);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // Arduino: turn the LED off (LOW)
                                     // D1 Mini: turns the LED *on*
  delay(250);                       // wait for a second

  Serial.println("---- Running ----");
}

The device constantly crashes because the watchdog timer is invoked:

13:34:12.627 ->  ets Jan  8 2013,rst cause:4, boot mode:(3,6)
13:34:12.627 -> 
13:34:12.627 -> wdt reset
13:34:12.627 -> load 0x4010f000, len 3460, room 16 
13:34:12.627 -> tail 4
13:34:12.627 -> chksum 0xcc
13:34:12.627 -> load 0x3fff20b8, len 40, room 4 
13:34:12.627 -> tail 4
13:34:12.627 -> chksum 0xc9
13:34:12.627 -> csum 0xc9
13:34:12.627 -> v00042540
13:34:12.627 -> ~ld

Here's the stack trace:

Exception (0):
epc1=0x4023380c epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

>>>stack>>>

ctx: sys
sp: 3fffe550 end: 3fffffb0 offset: 0190
3fffe6e0:  40105534 40105531 00000000 00000000  
3fffe6f0:  400005e1 00000000 00000000 00000000  
3fffe700:  4023380c 00000033 00000020 00000000  
3fffe710:  4010553a 04000102 00000000 00000001  
3fffe720:  fbf8ffff 04000002 3feffe00 00000100  
3fffe730:  0000001e 00000018 04000102 4010551c  
3fffe740:  3fffc100 00000001 00000000 00000000  
3fffe750:  00000000 00000000 00000000 00000000  
3fffe760:  00000000 00000000 00000000 00000000  
3fffe770:  00000000 00000000 00000000 00000000  
3fffe780:  00000000 00000000 00000000 00000000  
3fffe790:  00000000 00000000 00000000 00000000  
3fffe7a0:  00000000 00000000 00000000 00000000  
3fffe7b0:  00000000 00000000 00000000 00000000  
3fffe7c0:  00000000 00000000 00000000 00000000  
3fffe7d0:  00000000 00000000 00000000 00000000  
3fffe7e0:  00000000 00000000 00000000 00000000  
3fffe7f0:  40105534 40105531 00000000 00000000  
3fffe800:  400005e1 00000000 00000000 00000000  
3fffe810:  4022676e 00000030 00000020 00000000  
3fffe820:  0000003b 402265d4 0000005e ffffffb7  
3fffe830:  0000000e 402265f5 0000005c 0000005b  
3fffe840:  0000005d 00000076 ffffff83 0000000b  
3fffe850:  0000099e 00000001 00000000 00000000  
3fffe860:  00000000 00000000 00000000 00000000  
3fffe870:  00000000 00000000 00000000 00000000  
3fffe880:  00000000 00000000 00000001 40006545  
3fffe890:  00000000 00000000 00000000 40006545  
3fffe8a0:  00000000 ffffffe8 ffffffbc 2e2c2927  
3fffe8b0:  400069d9 ffffffe8 3ffe89d0 00000000  
3fffe8c0:  00000000 00000000 00000001 40006545  
3fffe8d0:  00000000 00000000 00000000 40006545  
3fffe8e0:  00000000 ffffffe8 ffffffe8 2e2c2927  
3fffe8f0:  400069d9 ffffffe8 3ffe89d0 00000000  
3fffe900:  4022658b 0000000b 000000f8 4022ca30  
3fffe910:  00000000 40226880 0000000b 00000000  
3fffe920:  00000001 00000001 3ffe8a18 40228068  
3fffe930:  00000001 3ffe89e0 3ffe89d0 3ffe89e0  
3fffe940:  0000001f 00000000 00000001 3ffe89e0  
3fffe950:  00000064 00000001 40227f81 00000002  
3fffe960:  0000000b 00000138 00000006 00000001  
3fffe970:  00000001 00000000 00000002 40006784  
3fffe980:  00000000 3ffe89d0 2c32363a 00002428  
3fffe990:  00000002 40228531 00000002 3ffe89d0  
3fffe9a0:  3ffe89e0 00000001 00000004 4022b0e5  
3fffe9b0:  1c1c1916 19161310 00000000 00000000  
3fffe9c0:  0000373a 40229bfb 3ffe89d8 3ffe89e0  
3fffe9d0:  00000ff4 40229c0d 3ffe89d8 3ffe89e0  
3fffe9e0:  00000001 3ffe8b2a 00000001 60000200  
3fffe9f0:  40226d07 3ffe89d0 3ffe89d0 00000000  
3fffea00:  4022d231 60000e00 3ffe89e0 00000001  
3fffea10:  40101816 60000e00 00f900f9 00f8013a  
3fffea20:  4022a8d0 060b0207 02060b02 fe881009  
3fffea30:  4a4e800e b20069d9 3df4cfa2 3ffeefa4  
3fffea40:  00000000 00000000 000088e1 402334df  
3fffea50:  3ffee04e 60000e00 3ffee02c 3ffee04e  
3fffea60:  00000001 00000001 00000000 ffff0000  
3fffea70:  40233dbb 3ffeefa4 ffffffff 40233d63  
3fffea80:  3ffeef84 00001000 401057d1 00000ffd  
3fffea90:  0000001f ffffffff 00000000 00000000  
3fffeaa0:  3ffef024 00000000 00000003 00000000  
3fffeab0:  ffffffff ffffffff ffff0002 00000000  
3fffeac0:  00000000 00000000 00000000 00000000  
3fffead0:  00000000 00000000 00000000 00000000  
3fffeae0:  ffffffff 00ffffff 00000000 00000000  
3fffeaf0:  00000000 00000000 00000000 00000000  
3fffeb00:  00000000 00000000 00000000 00000000  
3fffeb10:  00000000 00000000 00000000 00000000  
3fffeb20:  00000000 ff000000 ffffffff ffffffff  
3fffeb30:  ffffffff ffffffff ffffffff ffffffff  
3fffeb40:  ffffffff ffffffff ffffffff ffffffff  
3fffeb50:  ffffffff ffffffff ffff00ff ffffffff  
3fffeb60:  0000000a 2d505345 39443936 00004433  
3fffeb70:  00000000 00000000 00000000 00000000  
3fffeb80:  00000000 00000000 00000000 00000000  
3fffeb90:  00000000 00000000 00000000 00000000  
3fffeba0:  00000000 00000000 00000000 00000000  
3fffebb0:  00000000 00000000 00000000 00000000  
3fffebc0:  00000000 ffffffff ffffffff ffffffff  
3fffebd0:  ffffffff ffffffff ffffffff ffffffff  
3fffebe0:  ffffffff 000001ff ffffff04 ffffff01  
3fffebf0:  ffffffff ffffffff ffffffff ffffffff  
3fffec00:  ffffffff ffffffff ffffffff ffffffff  
3fffec10:  ffffffff ffffffff ffffffff ffffffff  
3fffec20:  ffffffff ffffffff ffffffff ffffffff  
3fffec30:  ffffffff ffffffff ffffffff ffffffff  
3fffec40:  ffffffff ffffffff ffffffff ffffffff  
3fffec50:  ffffffff ffffffff ffffffff ffffffff  
3fffec60:  ffffffff ffffffff ffffffff ffffffff  
3fffec70:  ffffffff ffffffff ffffffff ffffffff  
3fffec80:  ffffffff ffffffff ffffffff ffffffff  
3fffec90:  ffffffff ffffffff ffffffff ffffffff  
3fffeca0:  ffffffff ffffffff ffffffff ffffffff  
3fffecb0:  ffffffff ffffffff ffffffff ffffffff  
3fffecc0:  ffffffff ffffffff ffffffff ffffffff  
3fffecd0:  ffffffff ffffffff ffffffff ffffffff  
3fffece0:  ffffffff ffffffff ffffffff ffffffff  
3fffecf0:  ffffffff ffffffff ffffffff ffffffff  
3fffed00:  ffffffff ffffffff ffffffff ffffffff  
3fffed10:  ffffffff ffffffff ffffffff ffffffff  
3fffed20:  ffffffff ffffffff ffffffff ffffffff  
3fffed30:  ffffffff ffffffff ffffffff ffffffff  
3fffed40:  ffffffff ffffffff ffffffff ffffffff  
3fffed50:  ffffffff ffffffff ffffffff ffffffff  
3fffed60:  ffffffff ffffffff ffffffff ffffffff  
3fffed70:  ffffffff ffffffff ffffffff ffffffff  
3fffed80:  ffffffff ffffffff ffffffff ffffffff  
3fffed90:  ffffffff ffffffff ffffffff ffffffff  
3fffeda0:  ffffffff ffffffff ffffffff ffffffff  
3fffedb0:  ffffffff ffffffff ffffffff ffffffff  
3fffedc0:  ffffffff ffffffff ffffffff ffffffff  
3fffedd0:  ffffffff ffffffff ffffffff ffffffff  
3fffede0:  ffffffff ffffffff ffffffff ffffffff  
3fffedf0:  ffffffff 00000003 ffffffff ffffffff  
3fffee00:  ffffffff ffffffff ffffffff ffffffff  
3fffee10:  ffffffff ffffffff ffffffff ffff0064  
3fffee20:  00000000 00000000 ffffffff ffffffff  
3fffee30:  ffffffff ffffffff ffffffff ffffffff  
3fffee40:  ffffffff ffffffff ffffffff ffffffff  
3fffee50:  ffffffff ffffffff ffffffff ffffffff  
3fffee60:  ffffffff ffffffff ffffffff ffffffff  
3fffee70:  ffffffff ffffffff ffffffff ffffffff  
3fffee80:  ffffffff ffffffff ffffffff ffffffff  
3fffee90:  ffffffff ffffffff ffffffff ffffffff  
3fffeea0:  ffffffff ffffffff ffffffff ffffffff  
3fffeeb0:  ffffffff ffffffff ffffffff ffffffff  
3fffeec0:  ffffffff ffffffff ffffffff ffffffff  
3fffeed0:  ffffffff ffffffff ffffffff ffffffff  
3fffeee0:  ffffffff ffffffff ffffffff ffffffff  
3fffeef0:  ffffffff ffffffff ffffffff ffffffff  
3fffef00:  ffffffff ffffffff ffffffff ffffffff  
3fffef10:  ffffffff ffffffff ffffffff ffffffff  
3fffef20:  ffffffff ffffffff ffffffff ffffffff  
3fffef30:  ffffffff ffffffff ffffffff ffffffff  
3fffef40:  cff4ffff 3dd969a2 ffff0081 40201c82  
3fffef50:  900202e9 40000f49 ffffff01 ffffffff  
3fffef60:  ffffffff ffffffff ffffffff ffffffff  
3fffef70:  ffffffff ffffffff ffffffff 40105339  
3fffef80:  000424d1 00000000 00000005 02050505  
3fffef90:  4010000d 05050405 fffdfe04 e0f0f0f0  
3fffefa0:  40224e6c 3fffef3c 40224e25 3fffff68  
3fffefb0:  3fffffc0 00000000 00000000 feefeffe  
3fffefc0:  feefeffe feefeffe feefeffe feefeffe  
3fffefd0:  feefeffe feefeffe feefeffe feefeffe  
3fffefe0:  feefeffe feefeffe feefeffe feefeffe  
3fffeff0:  feefeffe feefeffe feefeffe feefeffe  
3ffff000:  feefeffe feefeffe feefeffe feefeffe  
3ffff010:  feefeffe feefeffe feefeffe feefeffe  
3ffff020:  feefeffe feefeffe feefeffe feefeffe  
3ffff030:  feefeffe feefeffe feefeffe feefeffe  
3ffff040:  feefeffe feefeffe feefeffe feefeffe  
3ffff050:  feefeffe feefeffe feefeffe feefeffe  
3ffff060:  feefeffe feefeffe feefeffe feefeffe  
3ffff070:  feefeffe feefeffe feefeffe feefeffe  
3ffff080:  feefeffe feefeffe feefeffe feefeffe  
3ffff090:  feefeffe feefeffe feefeffe feefeffe  
3ffff0a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff0b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff0c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff0d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff0e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff0f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff100:  feefeffe feefeffe feefeffe feefeffe  
3ffff110:  feefeffe feefeffe feefeffe feefeffe  
3ffff120:  feefeffe feefeffe feefeffe feefeffe  
3ffff130:  feefeffe feefeffe feefeffe feefeffe  
3ffff140:  feefeffe feefeffe feefeffe feefeffe  
3ffff150:  feefeffe feefeffe feefeffe feefeffe  
3ffff160:  feefeffe feefeffe feefeffe feefeffe  
3ffff170:  feefeffe feefeffe feefeffe feefeffe  
3ffff180:  feefeffe feefeffe feefeffe feefeffe  
3ffff190:  feefeffe feefeffe feefeffe feefeffe  
3ffff1a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff1b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff1c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff1d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff1e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff1f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff200:  feefeffe feefeffe feefeffe feefeffe  
3ffff210:  feefeffe feefeffe feefeffe feefeffe  
3ffff220:  feefeffe feefeffe feefeffe feefeffe  
3ffff230:  feefeffe feefeffe feefeffe feefeffe  
3ffff240:  feefeffe feefeffe feefeffe feefeffe  
3ffff250:  feefeffe feefeffe feefeffe feefeffe  
3ffff260:  feefeffe feefeffe feefeffe feefeffe  
3ffff270:  feefeffe feefeffe feefeffe feefeffe  
3ffff280:  feefeffe feefeffe feefeffe feefeffe  
3ffff290:  feefeffe feefeffe feefeffe feefeffe  
3ffff2a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff2b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff2c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff2d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff2e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff2f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff300:  feefeffe feefeffe feefeffe feefeffe  
3ffff310:  feefeffe feefeffe feefeffe feefeffe  
3ffff320:  feefeffe feefeffe feefeffe feefeffe  
3ffff330:  feefeffe feefeffe feefeffe feefeffe  
3ffff340:  feefeffe feefeffe feefeffe feefeffe  
3ffff350:  feefeffe feefeffe feefeffe feefeffe  
3ffff360:  feefeffe feefeffe feefeffe feefeffe  
3ffff370:  feefeffe feefeffe feefeffe feefeffe  
3ffff380:  feefeffe feefeffe feefeffe feefeffe  
3ffff390:  feefeffe feefeffe feefeffe feefeffe  
3ffff3a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff3b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff3c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff3d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff3e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff3f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff400:  feefeffe feefeffe feefeffe feefeffe  
3ffff410:  feefeffe feefeffe feefeffe feefeffe  
3ffff420:  feefeffe feefeffe feefeffe feefeffe  
3ffff430:  feefeffe feefeffe feefeffe feefeffe  
3ffff440:  feefeffe feefeffe feefeffe feefeffe  
3ffff450:  feefeffe feefeffe feefeffe feefeffe  
3ffff460:  feefeffe feefeffe feefeffe feefeffe  
3ffff470:  feefeffe feefeffe feefeffe feefeffe  
3ffff480:  feefeffe feefeffe feefeffe feefeffe  
3ffff490:  feefeffe feefeffe feefeffe feefeffe  
3ffff4a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff4b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff4c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff4d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff4e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff4f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff500:  feefeffe feefeffe feefeffe feefeffe  
3ffff510:  feefeffe feefeffe feefeffe feefeffe  
3ffff520:  feefeffe feefeffe feefeffe feefeffe  
3ffff530:  feefeffe feefeffe feefeffe feefeffe  
3ffff540:  feefeffe feefeffe feefeffe feefeffe  
3ffff550:  feefeffe feefeffe feefeffe feefeffe  
3ffff560:  feefeffe feefeffe feefeffe feefeffe  
3ffff570:  feefeffe feefeffe feefeffe feefeffe  
3ffff580:  feefeffe feefeffe feefeffe feefeffe  
3ffff590:  feefeffe feefeffe feefeffe feefeffe  
3ffff5a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff5b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff5c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff5d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff5e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff5f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff600:  feefeffe feefeffe feefeffe feefeffe  
3ffff610:  feefeffe feefeffe feefeffe feefeffe  
3ffff620:  feefeffe feefeffe feefeffe feefeffe  
3ffff630:  feefeffe feefeffe feefeffe feefeffe  
3ffff640:  feefeffe feefeffe feefeffe feefeffe  
3ffff650:  feefeffe feefeffe feefeffe feefeffe  
3ffff660:  feefeffe feefeffe feefeffe feefeffe  
3ffff670:  feefeffe feefeffe feefeffe feefeffe  
3ffff680:  feefeffe feefeffe feefeffe feefeffe  
3ffff690:  feefeffe feefeffe feefeffe feefeffe  
3ffff6a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff6b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff6c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff6d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff6e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff6f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff700:  feefeffe feefeffe feefeffe feefeffe  
3ffff710:  feefeffe feefeffe feefeffe feefeffe  
3ffff720:  feefeffe feefeffe feefeffe feefeffe  
3ffff730:  feefeffe feefeffe feefeffe feefeffe  
3ffff740:  feefeffe feefeffe feefeffe feefeffe  
3ffff750:  feefeffe feefeffe feefeffe feefeffe  
3ffff760:  feefeffe feefeffe feefeffe feefeffe  
3ffff770:  feefeffe feefeffe feefeffe feefeffe  
3ffff780:  feefeffe feefeffe feefeffe feefeffe  
3ffff790:  feefeffe feefeffe feefeffe feefeffe  
3ffff7a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff7b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff7c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff7d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff7e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff7f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff800:  feefeffe feefeffe feefeffe feefeffe  
3ffff810:  feefeffe feefeffe feefeffe feefeffe  
3ffff820:  feefeffe feefeffe feefeffe feefeffe  
3ffff830:  feefeffe feefeffe feefeffe feefeffe  
3ffff840:  feefeffe feefeffe feefeffe feefeffe  
3ffff850:  feefeffe feefeffe feefeffe feefeffe  
3ffff860:  feefeffe feefeffe feefeffe feefeffe  
3ffff870:  feefeffe feefeffe feefeffe feefeffe  
3ffff880:  feefeffe feefeffe feefeffe feefeffe  
3ffff890:  feefeffe feefeffe feefeffe feefeffe  
3ffff8a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff8b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff8c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff8d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff8e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff8f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff900:  feefeffe feefeffe feefeffe feefeffe  
3ffff910:  feefeffe feefeffe feefeffe feefeffe  
3ffff920:  feefeffe feefeffe feefeffe feefeffe  
3ffff930:  feefeffe feefeffe feefeffe feefeffe  
3ffff940:  feefeffe feefeffe feefeffe feefeffe  
3ffff950:  feefeffe feefeffe feefeffe feefeffe  
3ffff960:  feefeffe feefeffe feefeffe feefeffe  
3ffff970:  feefeffe feefeffe feefeffe feefeffe  
3ffff980:  feefeffe feefeffe feefeffe feefeffe  
3ffff990:  feefeffe feefeffe feefeffe feefeffe  
3ffff9a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff9b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff9c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff9d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff9e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff9f0:  feefeffe feefeffe feefeffe feefeffe  
3ffffa00:  feefeffe feefeffe feefeffe feefeffe  
3ffffa10:  feefeffe feefeffe feefeffe feefeffe  
3ffffa20:  feefeffe feefeffe feefeffe feefeffe  
3ffffa30:  feefeffe feefeffe feefeffe feefeffe  
3ffffa40:  feefeffe feefeffe feefeffe feefeffe  
3ffffa50:  feefeffe feefeffe feefeffe feefeffe  
3ffffa60:  feefeffe feefeffe feefeffe feefeffe  
3ffffa70:  feefeffe feefeffe feefeffe feefeffe  
3ffffa80:  feefeffe feefeffe feefeffe feefeffe  
3ffffa90:  feefeffe feefeffe feefeffe feefeffe  
3ffffaa0:  feefeffe feefeffe feefeffe feefeffe  
3ffffab0:  feefeffe feefeffe feefeffe feefeffe  
3ffffac0:  feefeffe feefeffe feefeffe feefeffe  
3ffffad0:  feefeffe feefeffe feefeffe feefeffe  
3ffffae0:  feefeffe feefeffe feefeffe feefeffe  
3ffffaf0:  feefeffe feefeffe feefeffe feefeffe  
3ffffb00:  feefeffe feefeffe feefeffe feefeffe  
3ffffb10:  feefeffe feefeffe feefeffe feefeffe  
3ffffb20:  feefeffe feefeffe feefeffe feefeffe  
3ffffb30:  feefeffe feefeffe feefeffe feefeffe  
3ffffb40:  feefeffe feefeffe feefeffe feefeffe  
3ffffb50:  feefeffe feefeffe feefeffe feefeffe  
3ffffb60:  feefeffe feefeffe feefeffe feefeffe  
3ffffb70:  feefeffe feefeffe feefeffe feefeffe  
3ffffb80:  feefeffe feefeffe feefeffe feefeffe  
3ffffb90:  feefeffe feefeffe feefeffe feefeffe  
3ffffba0:  feefeffe feefeffe feefeffe feefeffe  
3ffffbb0:  feefeffe feefeffe feefeffe feefeffe  
3ffffbc0:  feefeffe feefeffe feefeffe feefeffe  
3ffffbd0:  feefeffe feefeffe feefeffe feefeffe  
3ffffbe0:  feefeffe feefeffe feefeffe feefeffe  
3ffffbf0:  feefeffe feefeffe feefeffe feefeffe  
3ffffc00:  feefeffe feefeffe feefeffe feefeffe  
3ffffc10:  feefeffe feefeffe feefeffe feefeffe  
3ffffc20:  feefeffe feefeffe feefeffe feefeffe  
3ffffc30:  feefeffe feefeffe feefeffe feefeffe  
3ffffc40:  feefeffe feefeffe feefeffe feefeffe  
3ffffc50:  feefeffe feefeffe feefeffe feefeffe  
3ffffc60:  feefeffe feefeffe feefeffe feefeffe  
3ffffc70:  feefeffe feefeffe feefeffe feefeffe  
3ffffc80:  feefeffe feefeffe feefeffe feefeffe  
3ffffc90:  feefeffe feefeffe feefeffe feefeffe  
3ffffca0:  feefeffe feefeffe feefeffe feefeffe  
3ffffcb0:  feefeffe feefeffe feefeffe feefeffe  
3ffffcc0:  feefeffe feefeffe feefeffe feefeffe  
3ffffcd0:  feefeffe feefeffe feefeffe feefeffe  
3ffffce0:  feefeffe feefeffe feefeffe feefeffe  
3ffffcf0:  feefeffe feefeffe feefeffe feefeffe  
3ffffd00:  feefeffe feefeffe feefeffe feefeffe  
3ffffd10:  feefeffe feefeffe feefeffe feefeffe  
3ffffd20:  feefeffe feefeffe feefeffe feefeffe  
3ffffd30:  00000004 00000000 00000010 00000000  
3ffffd40:  00000004 00000000 00000010 00000000  
3ffffd50:  feefeffe feefeffe feefeffe feefeffe  
3ffffd60:  00000000 80000000 00000000 0000001b  
3ffffd70:  00002000 feefeffe 00002000 00008000  
3ffffd80:  0000000c 00000000 00002000 00000000  
3ffffd90:  00008000 00000000 00000010 00000000  
3ffffda0:  3ffffde4 3ffffde8 40001e65 3ffffdf5  
3ffffdb0:  3ffffe70 00000004 00000000 40001e4b  
3ffffdc0:  3ffffdf4 00000000 00000000 00000000  
3ffffdd0:  3ffee974 00000000 00006000 4020b740  
3ffffde0:  00008000 00000000 0000000a 00000000  
3ffffdf0:  32346530 00000034 40001e65 3ffffe42  
3ffffe00:  3ffffec0 0000000c 00000041 40001e4b  
3ffffe10:  3ffffe41 00000000 00000000 00000000  
3ffffe20:  00006000 00000000 00006000 0000a000  
3ffffe30:  00000000 00000000 00006000 feefeffe  
3ffffe40:  3fffd848 40002364 00000001 00000000  
3ffffe50:  40001db4 00000078 00000000 00000010  
3ffffe60:  40001f46 00000009 3ffef22c 40001e4b  
3ffffe70:  40001db4 00000030 00000000 00000000  
3ffffe80:  40001f46 00000002 3ffef22c 40233304  
3ffffe90:  3fffd848 40002364 00000007 00000000  
3ffffea0:  40001db4 00000078 00000000 00000010  
3ffffeb0:  00000000 3fffff20 3fffff20 3fff20be  
3ffffec0:  40002514 3fffdd3c 00000004 00000000  
3ffffed0:  00000000 3fffff40 3fffff40 3fff20c6  
3ffffee0:  40002514 3fffdd3c 00000000 00000000  
3ffffef0:  00000000 40002394 00000004 ffffffff  
3fffff00:  3fffff20 00000000 00000000 3ffffe90  
3fffff10:  00000000 400042db 3fffff90 00000001  
3fffff20:  40004b31 00042125 00000000 00000004  
3fffff30:  4010f17a 00000003 00000000 3ffffec2  
3fffff40:  3ffe8610 000003ac 900205e9 401000bc  
3fffff50:  00000000 00000000 00000009 4010f522  
3fffff60:  dd05c6b7 ffffffff 00000000 633fa908  
3fffff70:  3e69a591 e00e2f19 42eacb7e 028bf59f  
3fffff80:  daf92cce b6ca9fb3 cfee6521 bfff46a5  
3fffff90:  f6a2dbcf 2a9ffd0e 075acc26 ffea3fed  
3fffffa0:  6aacb475 d8a17f60 04d65698 db88dc37  
<<<stack<<<

This decodes to:


Exception 0: Illegal instruction
PC: 0x4023380c
EXCVADDR: 0x00000000

Decoding stack results
0x40201c82: loop_task(ETSEvent*) at /Users/goli/Library/Arduino15/packages/esp8266/hardware/esp8266/3.0.1/cores/esp8266/core_esp8266_main.cpp line 213
0x4020b740: esp2glue_netif_update at glue-lwip/lwip-git.c line 418
0x40233304: netif_set_addr at glue-esp/lwip-esp.c line 556
0x401000bc: app_entry() at /Users/goli/Library/Arduino15/packages/esp8266/hardware/esp8266/3.0.1/cores/esp8266/core_esp8266_main.cpp line 328

If I comment out the line WiFi.mode(WIFI_STA); the device does NOT crash, and the LED continues to flash.

Does anyone know why this might be happening?

I've tried the same code on a D1 Mini (not pro) and it works just fine.

Thanks

2

how is it powered?

3

The board is plugged via USB into a Macbook Pro M1, nothing else is plugged into the board.

If I take the board and power it directly from a 2A 5V USB charger the same thing happens, the LED flashes for a bit, then stops as the device crashes and reboots.

4

Hi,
try this code;

#include <ESP8266WiFi.h>
#include <WiFiClient.h>

void setup() {
  Serial.begin(115200);
  Serial.println("---- SETUP ----");

  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);

  WiFi.disconnect();
  WiFi.mode(WIFI_STA);
}

// the loop function runs over and over again forever
void loop() {
  yield();    // <  <  -------
  digitalWrite(LED_BUILTIN, HIGH);   // Arduino: turn the LED on (HIGH)
                                     // D1 Mini: turns the LED *off*
  delay(250);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // Arduino: turn the LED off (LOW)
                                     // D1 Mini: turns the LED *on*
  delay(250);                       // wait for a second

  Serial.println("---- Running ----");
}
5

No joy, same result.
I've tried this with another pro board (I purchased 20), and same results.

6

Interestingly I just plugged in a fresh board and loaded serial monitor.
The LED on the board constantly flashes at maybe 5hz, and the following is output repeatedly to the serial monitor:

 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x40100000, len 27728, room 16 
tail 0
chksum 0x2a
load 0x3ffe8000, len 2124, room 8 
tail 4
chksum 0x07
load 0x3ffe8850, len 9276, room 4 
tail 8
chksum 0xba
csum 0xba
Fatal exception 0(IllegalInstructionCause):
epc1=0x4021ed61, epc2=0x00000000, epc3=0x00000000, excvaddr=0x7fffffff, depc=0x00000000

Any ideas?

7

You mean that if you remove

  WiFi.disconnect();
  WiFi.mode(WIFI_STA);

It doesn't crash ?

8

Correct. Actually it’s just the WiFi.mode() that causes the crash (or WiFi.begin() or anything else that activates the chip).

9

try to set the TX RF power with
https://arduino-esp8266.readthedocs.io/en/latest/esp8266wifi/generic-class.html#setoutputpower

I guess you have a problem with antennas. do you have the external antenna attached?

10

I would suspect a power problem. Try another USB cable.

11

WiFi.setOutputPower(15);
This fixed the issue! Amazing.
I tried various values from 1, and topped out at 15, any value greater than this and the unit crashes.
I am not using the external antenna yet, just the built in ceramic one.
Is this likely to be a power supply issue then? I assume a larger value is going to draw more power and perhaps the power supply can't handle it?

12

Suspecting the issue is with the radio power as above, I just switched over to using the external antennae by re-soldering and moving the 0ohm resistor, and the board now works perfectly without the WiFi.setOutputPower(), and I've managed to load WLED onto the board :partying_face:.
I also confirmed when compared to the non-pro Wemos D1 Mini that the external antennae is able to see more wifi networks in the area, so it seems to work as intended with increased range.

Thank you all for the help debugging this, hopefully this this thread will help someone else in the future.

tl;dr:
Use the external antennae on the Wemos D1 mini pro and NOT the onboard ceramic one if you don't want your device to continually crash due to a watchdog timer being triggered when the wifi chip is activated.

If you must use the onboard antennae, then reduce the power using WiFi.setOutputPower(int dB); with a value that causes the device not to crash.

13

Your topic has been moved to a more suitable location on the forum. Installation and troubleshooting is not for problems with (nor for advice on) your project.

14

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