ESP8266 Community Forum

- Sat Dec 20, 2014 1:51 pm #5257 Hey Guys.

I'm currently having an issue with my Arduino-to-ESP-to thingspeak temp monitor. It will randomly just stop uploading for seemingly no reason. All it takes is a reset of power to the ESP (unplug) and it starts working again. Sometimes it works fine for 12 hours, other just 10 minutes. For power, I have tried both the 3.3v off the Uno (yeah, I know i shouldn't) and 2 AA's. Neither seems to affect the issue.

Here is my code just in case. I am using two temp sensors, one connected to the uno, and another wireless from my sons room upstairs, sent via Serial transceivers. Any help would be great. Thanks!

Code: Select all#include <DallasTemperature.h>
#include <OneWire.h>
#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); // RX, TX

#define ONE_WIRE_BUS 8
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
float temp;
float jxRoom;
long prevMil = 0;
long interval = 60000;

#define SSID "myssid"
#define PASS "mypassword"
#define IP "184.106.153.149" // thingspeak.com
String GET = "GET /update?key=my_key";

void setup()
{
  Serial.begin(9600);
  sensors.begin();
  Serial.println("AT");
  delay(5000);
  if(Serial.find("OK")){
    connectWiFi();
  }
  delay(1000);
  mySerial.begin(9600);
}

void loop(){
  if(mySerial.available())
  {
    jxRoom =(mySerial.read());
  }
  char buf2[10];
  String jTemp = dtostrf(jxRoom, 2, 0, buf2);
  sensors.requestTemperatures();
  float tempC = sensors.getTempCByIndex(0);
  tempC = DallasTemperature::toFahrenheit(tempC);
  delay(100);
  char buffer[10];
  String tempF = dtostrf(tempC, 4, 1, buffer);
  unsigned long curMil = millis();
  if(curMil - prevMil > interval)
  {
    prevMil = curMil;
    updateTemp(tempF, jTemp);
  }

//  delay(60000); took this out to use the "no delay"
}

void updateTemp(String tenmpF, String jTemp){
  String cmd = "AT+CIPSTART=\"TCP\",\"";
  cmd += IP;
  cmd += "\",80";
  Serial.println(cmd);
  delay(2000);
  if(Serial.find("Error")){
    return;
  }
  cmd = GET + "&field2=" + tenmpF + "&field1=" + jTemp + "\r\n";
  Serial.print("AT+CIPSEND=");
  Serial.println(cmd.length());
  if(Serial.find(">")){
    Serial.print(cmd);
  }
  else{
    Serial.println("AT+CIPCLOSE");
  }
  delay(100);
}


boolean connectWiFi(){
  Serial.println("AT+CWMODE=1");
  delay(2000);
  String cmd="AT+CWJAP=\"";
  cmd+=SSID;
  cmd+="\",\"";
  cmd+=PASS;
  cmd+="\"";
  Serial.println(cmd);
  delay(5000);
  if(Serial.find("OK")){
    return true;
  }
  else{
    return false;
  }
}



- Sat Dec 20, 2014 8:41 pm #5281 both power supply you tried were not really the good way to power it up.
try to use the recommended ones.

also, since you are having trouble in just 30mins, try to continously hook it up on a pc, and add a debug code to see what is happening after you dont see any updates on your thingspeak page.

i have an esp module connnected to thingspeak for more than a month now without problem.