IRremoteESP8266 2.7.4 crashes with WiFi :Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.

Created on 3 Apr 2020 · 25Comments · Source: crankyoldgit/IRremoteESP8266

It somehow interacts with WiFi. Original IRremote 2.2.3 https://github.com/z3t0/Arduino-IRremote works when myReceiver.enableIRIn(); is called after WiFi init, otherwise it crashes with "Guru Meditation Error: Core 1 panic'ed (Cache disabled but cached memory region accessed)", see IRAM_ATTR isn't working at https://github.com/espressif/arduino-esp32/issues/1781

The IRremoteESP826 library "version": "2.7.4", with a standard receive code:

static IRrecv myReceiver(IR_reciverPin);
static decode_results myDecode;
in setup:
  pinMode(IR_reciverPin,INPUT);
  myReceiver.enableIRIn();

in loop:
  if (myReceiver.decode(&myDecode)) {
    pult=myDecode.value;
    Serial.print(pult, HEX); Serial.print(F(" protocol=")); Serial.println(myDecode.decode_type);
    myReceiver.resume(); 
  }

does not work at all. It produces a different **Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.**

CREATE WiFi AP YYYYYYY Ready
WIFI IP address = 192.168.4.1
ACCESS THE SITE AS http://192.168.4.1/

Starting web server on port: '80'
Starting stream server on port: '81'
# crash after WiFi
Guru Meditation Error: Core  1 panic'ed (LoadProhibited). Exception was unhandled.

Core 1 register dump:
PC      : 0x4016e48b  PS      : 0x00060130  A0      : 0x800db0fc  A1      : 0x3ffce280  
A2      : 0x00000000  A3      : 0x00000000  A4      : 0x400813a0  A5      : 0x00000000  
A6      : 0x3ffc2fdc  A7      : 0x00000000  A8      : 0x800e2cf0  A9      : 0x3ffce230  
A10     : 0x00000105  A11     : 0x0000040e  A12     : 0x00000000  A13     : 0x00000000  
A14     : 0x400813a0  A15     : 0x00000000  SAR     : 0x0000001f  EXCCAUSE: 0x0000001c  
EXCVADDR: 0x00000000  LBEG    : 0x4000c349  LEND    : 0x4000c36b  LCOUNT  : 0xffffffff  
ELF file SHA256: 0000000000000000000000000000000000000000000000000000000000000000
Backtrace: 0x4016e48b:0x3ffce280 0x400db0f9:0x3ffce2a0 0x400db161:0x3ffce2d0 0x400d4077:0x3ffce2f0 0x400d2505:0x3ffce310 0x400dcb86:0x3ffce3b0 0x400932cd:0x3ffce3d0
Rebooting...
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1216
ho 0 tail 12 room 4
load:0x40078000,len:10864
load:0x40080400,len:6432
entry 0x400806b8

I also tried to switch the order of WiFi and myReceiver.enableIRIn(); initialization. This does help for original IRremote https://github.com/z3t0/Arduino-IRremote/issues/518 but does not help for IRremoteESP826.

WiFi code that create a problem for IR interrupts

    Serial.print("CREATE WiFi AP ");Serial.print(ssid_AP);
    WiFi.enableAP(true);
    bool wifiapres=WiFi.softAP(ssid_AP/*, password*/);
    Serial.println(wifiapres ? " Ready" : " Failed!");
    myIP = WiFi.softAPIP();
  Serial.print("WIFI IP address = ");Serial.println(myIP);
  Serial.print("ACCESS THE SITE AS http://"); Serial.print(myIP);Serial.println("/");

To reproduce: take https://github.com/espressif/arduino-esp32/tree/master/libraries/ESP32/examples/Camera/CameraWebServer with ESP-CAM with #define CAMERA_MODEL_AI_THINKER and add the standard setup/loop IR read code to this sketch.

And this WiFi code (try to connect, if failure -- do AP) is even more prone to system panic when used with IRremoteESP8266 or IRRemote. It works perfectly OK with commented out timer init myReceiver.enableIRIn();

  WiFi.begin(ssid, password);delay(300);
  unsigned long StartTime=micros();
  for(int j=0; j<10;j++)
  {
    if(WiFi.status() == WL_CONNECTED) break;
    delay(400);
    if (micros() > (StartTime+5000000UL)) break;
  }

  if(WiFi.status() == WL_CONNECTED){
    Serial.print("Connected OK to ssid=");Serial.print(ssid);Serial.print(" password=");Serial.println(password);
    myIP=WiFi.localIP();
    } else  {
    //--------------------------- создать новую AP
    Serial.print("FAILED to connect to ssid=");Serial.println(ssid);
    Serial.print("CREATE WiFi AP ");Serial.print(ssid_AP);
    WiFi.enableAP(true);
    bool wifiapres=WiFi.softAP(ssid_AP/*, password*/);
    Serial.println(wifiapres ? " Ready" : " Failed!");
    myIP = WiFi.softAPIP();
  }

ESP32

Source

mal19992

All 25 comments

You haven't stated it, but your using an ESP32. Correct?
Can you please try some of the example code that uses WiFi and see if that crashes too?
IRMQTTServer has an info page, that lists core library versions etc. Could you please pass that info on.

Can you simplify your code down to the smallest you can that still causes the crash, so I can replicate it and test it at my end?

crankyoldgit on 4 Apr 2020

I use ESP32-CAM https://randomnerdtutorials.com/esp32-cam-video-streaming-face-recognition-arduino-ide/ The easiest way to reproduce is this:

Take https://github.com/espressif/arduino-esp32/tree/master/libraries/ESP32/examples/Camera/CameraWebServer sketch (it is among examples)
Apply attached patch, it adds IR calls to setup() and loop()
Observe constant reboots
comment the line // myReceiver.enableIRIn(); No reboots, WiFi and everything now works OK

reboots:

Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.

Core 1 register dump:

PC : 0x40167ef7 PS : 0x00060a30 A0 : 0x800d9f98 A1 : 0x3ffb1e80

A2 : 0x00000000 A3 : 0x00000000 A4 : 0x400813a0 A5 : 0x00000000

A6 : 0x3ffc1ffc A7 : 0x00000000 A8 : 0x800dfc68 A9 : 0x3ffb1e30

A10 : 0x00000105 A11 : 0x0000040e A12 : 0x00000000 A13 : 0x00000000

A14 : 0x400813a0 A15 : 0x00000000 SAR : 0x0000001f EXCCAUSE: 0x0000001c

EXCVADDR: 0x00000000 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0xffffffff

ELF file SHA256: 0000000000000000000000000000000000000000000000000000000000000000

Backtrace: 0x40167ef7:0x3ffb1e80 0x400d9f95:0x3ffb1ea0 0x400d9ffd:0x3ffb1ed0 0x400d3633:0x3ffb1ef0 0x400d16ce:0x3ffb1f10 0x400dae9a:0x3ffb1fb0 0x400932cd:0x3ffb1fd0

Rebooting...

ets Jun 8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)

configsip: 0, SPIWP:0xee

clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00

mode:DIO, clock div:1

load:0x3fff0018,len:4

load:0x3fff001c,len:1216

ho 0 tail 12 room 4

load:0x40078000,len:10864

load:0x40080400,len:6432

entry 0x400806b8