Cut Exception for Decoder Error

Projects Programming
1

Hi, I'm writing a Hydroponic Automation System but i got this issue using a WeMos D1 Wifi board that spits out an error here's the complete code below, i'm not sure why what i think it is a watch dog reset?

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ArduinoJson.h>
#include <DHT.h>
#include <Arduino.h>

#define DHTPIN D6 //D2 pin is dead
#define DHTTYPE DHT11   // DHT 11 temperature and humidity sensor

//DHT temperature and humidity
DHT dht(DHTPIN, DHTTYPE);

//wifi credentials
const char* ssid = "Wifi";
const char* password = "P@ssw0rd123";

ESP8266WebServer server(80);

StaticJsonDocument<256> jsonDocument;
char buffer[256];

//device information
char* moduleName = "ControlModule";
char* moduleID = "WMD105222022";
char* moduleType = "Prototype";
char* firmwareVersion = "1.15";

//temperature and humidity variables
double temperature;
double humidity;

//phSensor data sample
int samples = 10;
float adc_resolution = 1024.0;

//water level variable
int full; // green
int half; // blue

int f;
int h;
int v=100; //base voltage variable

//Mux/Multiplexer control pins
int s0 = D8;
int s1 = D9;
int s2 = D10;
int s3 = D11;

//Mux/multiplexer in SIG or signal pin
int SIG_pin = A0;

//webserver routing
void setup_routing() {     
  server.on("/device", deviceData);     
  server.on("/data", getData);      
  server.begin();    
}

//water level sensor voltage potential clac
float ph (float voltage) {
    return 7 + ((2.5 - voltage) / 0.18);
}

//generating json data for device api
void create_json(char *tag, double value, char *unit) {  
  jsonDocument.clear();  
  jsonDocument["value"] = value;
  jsonDocument["unit"] = unit;
  serializeJson(jsonDocument, buffer);
} 

void create_device(char *moduleID, char *moduleType, char *firmwareVersion) {  
  jsonDocument.clear();  
  jsonDocument["id"] = moduleID;
  jsonDocument["type"] = moduleType;
  jsonDocument["firmware"] = firmwareVersion;
  serializeJson(jsonDocument, buffer);
} 

void add_json_device(char *moduleID, char *moduleType, char *firmwareVersion) {
  JsonObject device = jsonDocument.createNestedObject("device");
  device["id"] = moduleID;
  device["type"] = moduleType;
  device["firmware"] = firmwareVersion;
}

void add_json_object(char *tag, double value, char *unit) {
  JsonObject obj = jsonDocument.createNestedObject(tag);
  obj["value"] = serialized(String(value,2));
  obj["unit"] = unit; 
}

//reading sensor for all sensor data
void read_sensor_data() {
  //temperature & humdity
  temperature = dht.readTemperature();
  humidity = dht.readHumidity();

  //ph sensor
  int measurings=0;
  for (int i = 0; i < samples; i++)
  {
    measurings += analogRead(readMux(0));
    delay(10);
  }

  //water level voltage potential
  float voltage = 5 / adc_resolution * measurings/samples;
  //water level
  full = readMux(1);
  half = readMux(2);
  pinMode(full, INPUT);
  pinMode(half, INPUT);  
  f=analogRead(full);
  h=analogRead(half);

  //console output for debugging  
  Serial.print("Green Wire Value: ");
  Serial.println(f);
  Serial.print("Blue Wire Value:");
  Serial.println(h);
  Serial.print("-> Temperature: ");
  Serial.print(temperature);
  Serial.print(", Humidity: ");
  Serial.print(humidity);
  Serial.print(", pH= ");
  Serial.print(ph(voltage));
  Serial.print(", WaterLevel = ");

  //conditional statement for water level
  if(f<400 && h<400 && f!=0 && h!=0){
    Serial.println("Tank is Full");
  }else if(f>400 && f!=0 && h<400 && h!=0){
    Serial.println("Tank is Half"); 
  }else if(f== 0 && h==0){
    Serial.println("Tank is Critical"); 
  }else{
    Serial.println("No Data");
  }
}

//generating json data
void deviceData() {
    create_device(moduleID, moduleType, firmwareVersion);
    server.send(200, "application/json", buffer);
}

//passing sensor data to generate json data for api use
void getData() {
  jsonDocument.clear();
  
  add_json_device(moduleID, moduleType, firmwareVersion);
  // add_json_device("type", moduleType);

  add_json_object("temperature", temperature, "°C");
  add_json_object("humidity", humidity, "%");
  
  serializeJson(jsonDocument, buffer);
  server.send(200, "application/json", buffer);
}

void setup_task() {    
  read_sensor_data();
}

void setup(void){
  //code needs to be run once
  Serial.begin(115200);

  //setting mux control pins
  pinMode(s0, OUTPUT); 
  pinMode(s1, OUTPUT); 
  pinMode(s2, OUTPUT); 
  pinMode(s3, OUTPUT); 

  digitalWrite(s0, LOW);
  digitalWrite(s1, LOW);
  digitalWrite(s2, LOW);
  digitalWrite(s3, LOW);

  WiFi.begin(ssid, password);
  Serial.println("");

  Serial.println("Connecting...");
  while (WiFi.status() != WL_CONNECTED){
  }

  Serial.println(F("DHT11 test!"));
  dht.begin();

  Serial.print("Connected! IP Address: ");
  Serial.println(WiFi.localIP());
  
  setup_task();    
  setup_routing();  
}

void loop(void){
  //code for runs on loop
  setup_task();     
  server.handleClient();
}

//Mux/Multiplexer truth table for assigning specific channel funtion
int readMux(int channel){
  int controlPin[] = {s0, s1, s2, s3};

  int muxChannel[16][4]={
    {0,0,0,0}, //channel 0
    {1,0,0,0}, //channel 1
    {0,1,0,0}, //channel 2
    {1,1,0,0}, //channel 3
    {0,0,1,0}, //channel 4
    {1,0,1,0}, //channel 5
    {0,1,1,0}, //channel 6
    {1,1,1,0}, //channel 7
    {0,0,0,1}, //channel 8
    {1,0,0,1}, //channel 9
    {0,1,0,1}, //channel 10
    {1,1,0,1}, //channel 11
    {0,0,1,1}, //channel 12
    {1,0,1,1}, //channel 13
    {0,1,1,1}, //channel 14
    {1,1,1,1}  //channel 15
  };

  //loop through the 4 sig
  for(int i = 0; i < 4; i ++){
    digitalWrite(controlPin[i], muxChannel[channel][i]);
  }

  //read the value at the SIG pin
  int val = analogRead(SIG_pin);

  //return the value
  return val;
}

and here's what i'm getting from the serial monitor

05:10:44.266 -> --------------- CUT HERE FOR EXCEPTION DECODER ---------------
05:10:44.298 -> 
05:10:44.298 -> Soft WDT reset
05:10:44.298 -> 
05:10:44.298 -> >>>stack>>>
05:10:44.298 -> 
05:10:44.298 -> ctx: cont
05:10:44.298 -> sp: 3ffffda0 end: 3fffffc0 offset: 01a0
05:10:44.298 -> 3fffff40:  40205f60 3ffe89bf 3ffeec10 40205f6c  
05:10:44.298 -> 3fffff50:  4023ef16 3ffeec10 3ffeebd4 00000001  
05:10:44.298 -> 3fffff60:  402400fb 0000000d 3ffeec10 4020643c  
05:10:44.298 -> 3fffff70:  3ffef674 40204ae0 00000000 40206488  
05:10:44.298 -> 3fffff80:  3fffdad0 3ffeebd4 3ffeec10 40201bd5  
05:10:44.331 -> 3fffff90:  feefeffe feefeffe feefeffe feefeffe  
05:10:44.331 -> 3fffffa0:  feefeffe 00000000 3ffeec88 40207e20  
05:10:44.331 -> 3fffffb0:  feefeffe feefeffe 3ffe8604 40100d3d  
05:10:44.331 -> <<<stack<<<
05:10:44.331 -> 
05:10:44.331 -> --------------- CUT HERE FOR EXCEPTION DECODER ---------------
05:10:44.364 -> 
05:10:44.364 ->  ets Jan  8 2013,rst cause:2, boot mode:(3,6)
05:10:44.364 -> 
05:10:44.364 -> load 0x4010f000, len 3460, room 16 
05:10:44.364 -> tail 4
05:10:44.364 -> chksum 0xcc
05:10:44.364 -> load 0x3fff20b8, len 40, room 4 
05:10:44.364 -> tail 4
05:10:44.364 -> chksum 0xc9
05:10:44.364 -> csum 0xc9
05:10:44.364 -> v0004bca0
05:10:44.364 -> ~ld
05:10:44.427 -> 
05:10:44.427 -> Connecting...
2

Did this problem occur with your last code change? Did it work while you were developing the program?

3

suggest you trying cutting out (#if 0/#endif) parts of the code to identify the cause of the reset

if it is a WDT reset, are you servicing the WDT?

4

Did the OP put the debug info into the Exception Decoder? What were the results?

5

what's that?

6

words like "esp exception decoder" in a search engine would provide some clues.

7

i usually save people the trouble by providing a link. it like a footnote to source of the information being referred to.

i come up a tool that looks likes it's designed for linux

8

Good for you.

9

The last one that i've added on this code base is the use of multiplexer, but before adding that everything is working fine but with noticeable delay on the sensor data or sometimes no data at all.

10

I'm going to look in to it, i.e. regarding the if and endif statements. No i am not servicing the WDT.