NodeMCU with Blynk error (Soft WDT reset, incorrect values..)

erickor · August 11, 2023, 8:18am

Hello, I’m making an AC current measuring and sending device.
but I have encountered some problems.

Details :
• NodeMCU(V3), ADS1115, SCT-013(CT Sensor 20A/1V)
• Blynk Library version : 1.1.0

First of all, the codes below work well in Arduino UNO and NodeMCU. I can read the currentRMS value.

#include <Wire.h>
#include <Adafruit_ADS1X15.h>

Adafruit_ADS1115 ads;

const float FACTOR = 20; //20A/1V from teh CT

const float multiplier = 0.00005;

void setup() {
 Wire.begin();
 Serial.begin(9600);
 ads.setGain(GAIN_FOUR);      // +/- 1.024V 1bit = 0.5mV
 ads.begin();

}

void printMeasure(String prefix, float value, String postfix)
{
 Serial.print(prefix);
 Serial.print(value, 3);
 Serial.println(postfix);
}

void loop() {
 float currentRMS = getcurrent();

 printMeasure("Irms: ", currentRMS, "A");
 delay(1000);

}

float getcurrent()
{
 float voltage;
 float current;
 float sum = 0;
 long time_check = millis();
 int counter = 0;

 while (millis() - time_check < 1000)
 {
   voltage = ads.readADC_Differential_0_1() * multiplier;
   current = voltage *  FACTOR;
   //current /= 1000.0;

   sum += sq(current);
   counter = counter + 1;
 }

 current = sqrt(sum / counter);
 return (current);
}

So, I modified the code above into “Blynk style”.


// Fill-in information from your Blynk Template here
#define BLYNK_TEMPLATE_ID ""
#define BLYNK_DEVICE_NAME ""

#define BLYNK_FIRMWARE_VERSION        "0.1.0"

#define BLYNK_PRINT Serial
//#define BLYNK_DEBUG

#define APP_DEBUG

// Uncomment your board, or configure a custom board in Settings.h
//#define USE_SPARKFUN_BLYNK_BOARD
//#define USE_NODE_MCU_BOARD
//#define USE_WITTY_CLOUD_BOARD
//#define USE_WEMOS_D1_MINI

#include "BlynkEdgent.h"
#include <Wire.h>
#include <Adafruit_ADS1X15.h>

Adafruit_ADS1115 ads;

BlynkTimer timer;

const float FACTOR = 20; //20A/1V from teh CT

const float multiplier = 0.00005;

float getcurrent()
{
  float voltage;
  float current;
  float sum = 0;
  long time_check = millis();
  int counter = 0;

  while (millis() - time_check < 1000)
  {
    voltage = ads.readADC_Differential_0_1() * multiplier;
    current = voltage *  FACTOR;
    //current /= 1000.0;

    sum += sq(current);
    counter = counter + 1;
  }

  current = sqrt(sum / counter);
  return (current);

}

BLYNK_CONNECTED()
{
  Blynk.syncVirtual(V7);
}

void sendSensor()
{
    float currentRMS = getcurrent();
    printMeasure("Irms: ", currentRMS, "A");
    Blynk.virtualWrite(V7, currentRMS);
    //delay(1000);
}

void setup()
{
  Wire.begin();
  Serial.begin(9600);
  ads.setGain(GAIN_FOUR);      // +/- 1.024V 1bit = 0.5mV
  ads.begin();
  BlynkEdgent.begin();
  timer.setInterval(1000L, sendSensor);
}

void printMeasure(String prefix, float value, String postfix)
{
  Serial.print(prefix);
  Serial.print(value, 3);
  Serial.println(postfix);
}

void loop() 
{
    BlynkEdgent.run();
    timer.run();
}

And I uploaded the code, but It didn’t work.
Serial monitor showed me Soft WDT reset.

⸮⸮b⸮LB⸮!⸮⸮⸮[288] 
    ___  __          __
   / _ )/ /_ _____  / /__
  / _  / / // / _ \/  '_/
 /____/_/\_, /_//_/_/\_\
        /___/ v1.1.0 on ESP8266

 #StandWithUkraine    https://bit.ly/swua


[359] --------------------------
[394] Product:  CTwithADS1115
[427] Firmware: 0.1.0 (build Aug 11 2023 10:59:15)
[481] Token:    •••• - •••• - •••• - ••••
[551] Device:   ESP8266 @ 80MHz
[585] MAC:      8C:AA:B5:D4:93:75
[621] Flash:    4096K
[645] ESP core: 3.0.2
[669] ESP SDK:  2.2.2-dev(38a443e)
[707] Boot Ver: 31
[728] Boot Mode:1
[748] FW info:  474656/1622016, MD5:60689752c8201e075b82b21a94a62fef
[962] Free mem: 29616
[962] --------------------------

>[962] INIT => CONNECTING_NET
[989] Connecting to WiFi: Zeteo
[5127] Using Dynamic IP: 192.168.0.65
[5127] CONNECTING_NET => CONNECTING_CLOUD
Irms: 1.748A
[6246] Current time: Fri Aug 11 02:09:37 2023
[6246] Connecting to blynk.cloud:443
[8435] Ready (ping: 11ms).
[8968] CONNECTING_CLOUD => RUNNING

--------------- CUT HERE FOR EXCEPTION DECODER ---------------

Soft WDT reset

>>>stack>>>

ctx: cont
sp: 3ffffc60 end: 3fffffc0 offset: 01a0
3ffffe00:  3fff0fc0 00000001 3fff0fc0 40212f72  
3ffffe10:  60000314 00000100 00000000 4021302f  
3ffffe20:  00000002 3fff0d2e 3fff0fc0 40213115  
3ffffe30:  00000048 3fff0fc0 00000001 3fff0cac  
3ffffe40:  60000314 00000001 3fff0fc0 00000002  
3ffffe50:  3fff1e44 3fff01fa 00000002 40213330  
3ffffe60:  00000001 00000048 3fffff20 4020deec  
3ffffe70:  4020ec01 3ffffecc 00000000 4020df20  
3ffffe80:  00000000 00000001 3fff0ca9 4020e264  
3ffffe90:  00000008 3ffffecc 3fffff58 3fff1e44  
3ffffea0:  00000002 00000002 00000000 4020e2e0  
3ffffeb0:  3fff01fa 00000001 00000001 00000000  
3ffffec0:  00000000 00000000 4bc6a7f0 000003e7  
3ffffed0:  00002309 3fff01fa 3fff01ec 4020e0a0  
3ffffee0:  00002309 00000001 3fff01ec 4020e0c8  
3ffffef0:  000006c2 00000001 3fff01ec 4020e12f  
3fffff00:  00002309 00000000 00000000 402028c1  
3fffff10:  00000000 00000000 4bc6a7f0 00000010  
3fffff20:  00000000 3ffefeac 3ffefea8 40204036  
3fffff30:  00002309 3ffe8650 00000004 40202349  
3fffff40:  00000000 001b001f 00000000 3fff0f74  
3fffff50:  3fffdad0 00000000 3ffefea8 402156b2  
3fffff60:  00000000 4020a6c0 3fff0bdc 40208f2f  
3fffff70:  00002309 0000137c 000007d0 40204770  
3fffff80:  3fffdad0 00000000 3fff0f60 3fff0f74  
3fffff90:  3fffdad0 00000000 3fff0f60 40208d56  
3fffffa0:  3fffdad0 00000000 3fff0f60 40212500  
3fffffb0:  feefeffe feefeffe 3ffe8690 40101151  
<<<stack<<<

--------------- CUT HERE FOR EXCEPTION DECODER ---------------
⸮Q)⸮⸮⸮@⸮1⸮H&A[288] 
    ___  __          __
   / _ )/ /_ _____  / /__
  / _  / / // / _ \/  '_/
 /____/_/\_, /_//_/_/\_\
        /___/ v1.1.0 on ESP8266

 #StandWithUkraine    https://bit.ly/swua


[359] --------------------------
[395] Product:  CTwithADS1115
[427] Firmware: 0.1.0 (build Aug 11 2023 10:59:15)
[481] Token:    •••• - •••• - •••• - ••••
[551] Device:   ESP8266 @ 80MHz
[585] MAC:      8C:AA:B5:D4:93:75
[622] Flash:    4096K
[646] ESP core: 3.0.2
[670] ESP SDK:  2.2.2-dev(38a443e)
[707] Boot Ver: 31
[728] Boot Mode:1
[748] FW info:  474656/1622016, MD5:60689752c8201e075b82b21a94a62fef
[962] Free mem: 29616
[962] --------------------------

>[962] INIT => CONNECTING_NET
[989] Connecting to WiFi: Zeteo
[5147] Using Dynamic IP: 192.168.0.65
[5147] CONNECTING_NET => CONNECTING_CLOUD
Irms: 1.724A
[6267] Current time: Fri Aug 11 02:09:50 2023
[6267] Connecting to blynk.cloud:443
[8466] Ready (ping: 12ms).
[9004] CONNECTING_CLOUD => RUNNING

--------------- CUT HERE FOR EXCEPTION DECODER ---------------

Soft WDT reset

>>>stack>>>

ctx: cont
sp: 3ffffc90 end: 3fffffc0 offset: 01a0
3ffffe30:  00000002 3fff0fc0 00000001 3fff0cac  
3ffffe40:  60000314 00000001 00000007 00000002  
3ffffe50:  3fff0fc0 3fff0cab 00000004 402131d6  
3ffffe60:  00000001 00000048 3fffff20 4020deec  
3ffffe70:  4020ec01 3ffffecc 00000000 3fff01fa  
3ffffe80:  00000000 00000001 3fff0ca9 40213310  
3ffffe90:  00000009 3ffffecc 3fffff58 4020df6c  
3ffffea0:  00000000 00000001 3fff1e44 4020e224  
3ffffeb0:  00000001 00000000 00000001 00000000  
3ffffec0:  00000000 00000000 4bc6a7f0 000003e7  
3ffffed0:  0000232d 3fff01fa 3fff01ec 4020e095  
3ffffee0:  0000232d 00000001 3fff01ec 4020e0c8  
3ffffef0:  000006c2 00000001 3fff01ec 4020e12f  
3fffff00:  0000232d 00000000 00000000 402028c1  
3fffff10:  00000000 00000000 4bc6a7f0 00000010  
3fffff20:  00000000 3ffefeac 3ffefea8 40204036  
3fffff30:  0000232d 3ffe8650 00000004 40202349  
3fffff40:  00000000 001b001f 00000000 3fff0f74  
3fffff50:  3fffdad0 00000000 3ffefea8 402156b2  
3fffff60:  00000000 4020a6c0 3fff0bdc 40208f2f  
3fffff70:  0000232d 0000137c 000007d0 40204770  
3fffff80:  3fffdad0 00000000 3fff0f60 3fff0f74  
3fffff90:  3fffdad0 00000000 3fff0f60 40208d56  
3fffffa0:  3fffdad0 00000000 3fff0f60 40212500  
3fffffb0:  feefeffe feefeffe 3ffe8690 40101151  
<<<stack<<<

--------------- CUT HERE FOR EXCEPTION DECODER ---------------
⸮⸮)⸮LC⸮֋⸮⸮![289] 
    ___  __          __
   / _ )/ /_ _____  / /__
  / _  / / // / _ \/  '_/
 /____/_/\_, /_//_/_/\_\
        /___/ v1.1.0 on ESP8266

 #StandWithUkraine    https://bit.ly/swua


[360] --------------------------
[396] Product:  CTwithADS1115
[428] Firmware: 0.1.0 (build Aug 11 2023 10:59:15)
[482] Token:    •••• - •••• - •••• - ••••
[552] Device:   ESP8266 @ 80MHz
[586] MAC:      8C:AA:B5:D4:93:75
[623] Flash:    4096K
[647] ESP core: 3.0.2
[671] ESP SDK:  2.2.2-dev(38a443e)
[708] Boot Ver: 31
[729] Boot Mode:1
[749] FW info:  474656/1622016, MD5:60689752c8201e075b82b21a94a62fef
[963] Free mem: 29616
[963] --------------------------

>[963] INIT => CONNECTING_NET
[990] Connecting to WiFi: Zeteo
[12901] Using Dynamic IP: 192.168.0.65
[12901] CONNECTING_NET => CONNECTING_CLOUD
Irms: 1.701A
[14020] Current time: Fri Aug 11 02:10:10 2023
[14020] Connecting to blynk.cloud:443
[16216] Ready (ping: 11ms).
[16753] CONNECTING_CLOUD => RUNNING

--------------- CUT HERE FOR EXCEPTION DECODER ---------------

Soft WDT reset

>>>stack>>>

ctx: cont
sp: 3ffffca0 end: 3fffffc0 offset: 01a0
3ffffe40:  60000314 00000001 3fff0fc0 40212ee1  
3ffffe50:  3fff0fc0 3fff0cab 00000002 402131fb  
3ffffe60:  00000001 00000048 3fffff20 4020deec  
3ffffe70:  4020ec01 3ffffecb 00000000 3fff01fa  
3ffffe80:  00000000 00000001 3fff0ca9 40213310  
3ffffe90:  00000001 3ffffecb 3fffff58 4020df6c  
3ffffea0:  00000000 00000001 3fff1e44 4020e224  
3ffffeb0:  00000001 00000000 00000001 00000000  
3ffffec0:  00000000 00000000 4bc6a7f0 000003e7  
3ffffed0:  00004171 3fff01fa 3fff01ec 4020e095  
3ffffee0:  00004171 00000001 3fff01ec 4020e0c8  
3ffffef0:  0000033d 00000001 3fff01ec 4020e12f  
3fffff00:  00004171 00000000 00000000 402028c1  
3fffff10:  00000000 00000000 4bc6a7f0 00000010  
3fffff20:  00000000 3ffefeac 3ffefea8 40204036  
3fffff30:  00004171 3ffe8650 00000004 40202349  
3fffff40:  00000000 001b001f 00000000 3fff0f74  
3fffff50:  3fffdad0 00000000 3ffefea8 402156b2  
3fffff60:  00000000 4020a6c0 3fff0bdc 40208f2f  
3fffff70:  00004171 00002aed 000007d0 40204770  
3fffff80:  3fffdad0 00000000 3fff0f60 3fff0f74  
3fffff90:  3fffdad0 00000000 3fff0f60 40208d56  
3fffffa0:  3fffdad0 00000000 3fff0f60 40212500  
3fffffb0:  feefeffe feefeffe 3ffe8690 40101151  
<<<stack<<<

--------------- CUT HERE FOR EXCEPTION DECODER ---------------

Since this soft WDT reset, I changed the code.
I turned the watch dog off. but It didn’t work correctly.

#define BLYNK_TEMPLATE_ID ""
#define BLYNK_DEVICE_NAME ""
#define BLYNK_FIRMWARE_VERSION        "0.1.0"
#define BLYNK_PRINT Serial
//#define BLYNK_DEBUG
#define APP_DEBUG

#include <Wire.h>
#include <Adafruit_ADS1X15.h>
#include "BlynkEdgent.h"

// Fill-in information from your Blynk Template here


Adafruit_ADS1115 ads;

const float FACTOR = 20; //20A/1V from teh CT
const float multiplier = 0.00005;

void setup() {
  Wire.begin();
  Serial.begin(9600);
  ads.setGain(GAIN_FOUR);      // +/- 1.024V 1bit = 0.5mV
  ads.begin();
  ESP.wdtDisable();
 *((volatile uint32_t*) 0x60000900) &= ~(1); 
  Wire.begin();
  BlynkEdgent.begin();
 delay(5000);
}

float getcurrent()
{
  double voltage;
  double current;
  double  sum = 0;
  long time_check = millis();
  int counter = 0;
// printf("1_1, ");
  while (millis() - time_check < 1000)
  {
    voltage = ads.readADC_Differential_0_1() * multiplier;
    current = voltage *  FACTOR;
    //current /= 1000.0;

    sum += sq(current);
    counter = counter + 1;
  }
// printf("1_2, ");
  current = sqrt(sum / counter);
// printf("1_3, ");
  return (current);
}

void printMeasure(String prefix, float value, String postfix)
{
  Serial.print(prefix);
  Serial.print(value, 3);
  Serial.println(postfix);
}

void loop() {

  double currentRMS = getcurrent();
  printMeasure("Irms: ", currentRMS, "A");
  delay(500);
  BlynkEdgent.run();
  Blynk.virtualWrite(V7, currentRMS);
  //delay(500);
}

This was the messages from serial monitor of new codes.
Even I didn’t connect SCT-013 current sensor, incorrect Irms values were displayed. (8.297A, 0.127A, 0.234A like that)

When Irms value reached 0.255A, system was stuck.
A few minutes later, watchdog reset the system even though I turned the watchdog off.

something noticeable point is…

At first, the correct Irms value was displayed. (twice?) (0.000A)
and then, suddenly the value rises. (8.297A)
finally, the value converges to 0.255A.

⸮Hpʸ⸮⸮LM⸮x>⸮⸮4⸮⸮)4[289] 
    ___  __          __
   / _ )/ /_ _____  / /__
  / _  / / // / _ \/  '_/
 /____/_/\_, /_//_/_/\_\
        /___/ v1.1.0 on ESP8266

 #StandWithUkraine    https://bit.ly/swua


[360] --------------------------
[395] Product:  CTwithADS1115
[428] Firmware: 0.1.0 (build Aug 11 2023 16:55:16)
[482] Token:    ueQA - •••• - •••• - ••••
[552] Device:   ESP8266 @ 80MHz
[586] MAC:      8C:AA:B5:D4:93:75
[622] Flash:    4096K
[646] ESP core: 3.0.2
[670] ESP SDK:  2.2.2-dev(38a443e)
[708] Boot Ver: 31
[729] Boot Mode:1
[748] FW info:  474784/1622016, MD5:d0619ffac673bd913dc220dc67d7f42d
[963] Free mem: 30448
[963] --------------------------

>[963] INIT => CONNECTING_NET
Irms: 0.000A
[7491] Connecting to WiFi: Zeteo
[11608] Using Dynamic IP: 192.168.0.65
[11608] CONNECTING_NET => CONNECTING_CLOUD
Irms: 0.000A
[13226] Current time: Fri Aug 11 07:56:35 2023
[13226] Connecting to blynk.cloud:443
[15490] Ready (ping: 12ms).
[15774] CONNECTING_CLOUD => RUNNING
Irms: 8.297A
Irms: 0.127A
Irms: 0.234A
Irms: 0.149A
Irms: 2.331A
Irms: 0.244A
Irms: 0.255A
Irms: 0.255A
Irms: 0.255A

I would really appreciate it if you could give me some advice.

Thank you!

PeteKnight · August 11, 2023, 9:06am

Why have you chosen to use the Blynk Edgent example as the basis for your sketch?
It adds an unnecessary degree of complexity for most projects.
Also, you’ve not un-commented a board type, so the Edgent example will use the custom board settings that are defined in Settings.h which may be conflicting with the pins you are using.

I’d simplify things by using a non-Edgent sketch as the basis for your code.

Also, you can’t clutter-up your void loop in the way you have in the last piece of code, it won’t work with Blynk.

Pete.

erickor · August 15, 2023, 8:12am

Thank you Pete.
I got a hint from you. When I defined a board type as NodeMCU, It started to work well.
(I used the “Blynk style” code, not the last code)

The reason why I have chosen to use the Blynk Edgent example as the basis for my sketch is that I don’t know other means.

Can I ask you to present a non-Edgent version of the first code in your thought?

If so, It should be very helpful for me.

PeteKnight · August 15, 2023, 8:19am

Scroll up to the top of this page, click “Sketch Builder” and you’ll see lots of examples.
Or, in the Arduino IDE, go to File > Examples > Blynk and choose any of the examples that don’t have “Edgent” in their name.

Pete.