Arduino: wdt reset with ESP8266WiFi.h include

[steenl]

Simply including ESP8266WiFi.h blinky sketch (Arduino 1.6.5 and board esp8266 v2.0.0) generates repeated wdt resets below.

This is across multiple esp-v01 modules. AT cmds allow me to login to my AP fine, so wifi seems to work.

 ets Jan  8 2013,rst cause:4, boot mode:(3,0)

wdt reset
load 0x4010f000, len 1264, room 16 
tail 0
chksum 0x42
csum 0x42
~ld

Code that triggers wdt resets below, and any suggestions greatly appreciated. :-)

#include <ESP8266WiFi.h>
int pin = 2;
void setup() {
 Serial.begin(115200);
  Serial.setDebugOutput(true);
  Serial.println("start");
  delay(10);
  pinMode(pin, OUTPUT);
}
void loop() {
  digitalWrite(pin, HIGH);   
  Serial.println("pin high");
  delay(1000);               
  digitalWrite(pin, LOW);   
  Serial.println("pin low");
  delay(1000);               
}

[steenl]

Something was wrong with my programming environment, perhaps an old install of 1.6.6.

[sonyarouje]

I am getting very similar issue. My code works fine without #include "ESP8266WiFi.h" and I can see hello world printing to my serial monitor.

I use a USB to FTDI module to upload code.

My ESP module is 'ESP8266 Serial ESP 01'

Not sure what is wrong here. I tried uploading the sketch via Arduino IDE 1.6.7 and 1.6.12.

Any help will be really appreciated.

Below is my code.

`#include "ESP8266WiFi.h"
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
}

void loop() {
// put your main code here, to run repeatedly:
Serial.println("hello world");
delay(1000);
}`

Error seeing in Serial monitor is

ets Jan 8 2013,rst cause:4, boot mode:(3,6)

wdt reset
load 0x4010f000, len 1384, room 16
tail 8
chksum 0x2d
csum 0x2d
v09f0c112
~ld

[krzychb]

Hi @sonyarouje,

I suspect the wdt reset is cased by inadequate power supply to the ESP-01 module.

To verify it, if you have a scope, consider checking the current spikes drawn by module with and without ESP8266WiFi.h included.

Regarding properly connecting ESP-01, please check section on Generic ESP8266 modules.

Also, for initial tests, consider using module with integrated power supply and usb to serial adapter. See section Introduction for examples of such modules (the rest of article is not relevant).

[rashey04ec]

I have solved it !!,
Please try to comment all pin you used in programming and it's related function )like pinMode , digitalWrite etc.

• Again save and upload it
  
  
  
  • check the serial monitor
  
  
  • if you not getting error that means this is because of pin declaration
  
  
  • to solve this issue : dont use #define declaration for initialize pin.
    
    -Direct use pin in pinMode definition and read /write function
  
  
  • Use GPIO no in if you are doing it in ARDUINO IDE
  
  

May be helpfull

Thanks :
Jaydeep Shah
E-mail : [email protected]