ThingSpeak

Ahaa I didn't check armens code actually, but i was so happy to see someone with the same problem date as me.

To give you a clear picture: Im using arduino pro mini with SIM800L and Im collecting weather data remotely using GPRS HTTPS posts to Thingspeak's API (writing bulk csv data). tens of these devices were functioning seamlessly for the past 3 years until the 14th of December, when they all went silent.

This is a simple code that had been working before the 14th (or the release i read about here )

#include <SoftwareSerial.h>

SoftwareSerial mySerial(8, 7);            // RX, TX Pins

#define GSMswitch  9    // select the pin for the switch to turn the GSM on/off

void setup() {

    pinMode(GSMswitch, OUTPUT);
    digitalWrite(GSMswitch, HIGH);
    Serial.begin(9600);
    Serial.println("Salamzzz");
    mySerial.begin(9600);
    delay(8000);  
  }

void loop() {

    gsm_sendhttp();

}

void gsm_sendhttp() {

    mySerial.println("AT");
    delay(500);
    ShowResponse();
    Serial.println("");
    mySerial.println(F("AT+SAPBR=3,1,Contype,GPRS"));
    delay(100);
    ShowResponse();
    Serial.println("");
    mySerial.println(F("AT+SAPBR=3,1,APN,m2ms.orange.jo"));         //change according to network - Umniah "mySerial.println(F("AT+SAPBR=3,1,APN,net"));" - Zain "mySerial.println(F("AT+SAPBR=3,1,APN,zain"));"
    delay(100);
    ShowResponse();
    Serial.println("");
    mySerial.println(F("AT+SAPBR =1,1"));
    delay(100);
    ShowResponse();
    Serial.println("");
    mySerial.println(F("AT+SAPBR=2,1"));
    delay(5000);//absolute minumum 1000ms
    ShowResponse();
    Serial.println("");
  //  wdt_reset();
    mySerial.println(F("AT+HTTPINIT"));
    delay(100);
    ShowResponse();
    Serial.println("");
    mySerial.println("AT+HTTPSSL=1");
    delay(100);
    ShowResponse();
    Serial.println("");
    mySerial.println(F("AT+HTTPPARA=CID,1"));
    delay(100);
    ShowResponse();
    Serial.println("");
    mySerial.println(F("AT+HTTPPARA=URL,https://api.thingspeak.com/channels/******/bulk_update.csv")); //to change channel simply replace the 6-digit number between "channels/" and "/bulk_update.csv"
    delay(200);
    while(mySerial.available()>0){ Serial.write(mySerial.read());delay(1);}
    Serial.println("");
    mySerial.println(F("AT+HTTPPARA=CONTENT,application/x-www-form-urlencoded"));
    delay(200);
    ShowResponse();
    Serial.println("");
    ShowResponse();
    Serial.println("");
    mySerial.println(F("AT+HTTPDATA=400,2000")); //absolute minumum 1000ms
    delay(200);
    ShowResponse();
    Serial.println("");
    mySerial.print(F("write_api_key=******************&time_format=relative&updates=1,1,2,3"));
    delay(2000); //absolute minumum 1000ms
    ShowResponse();
    Serial.println("");
    mySerial.println(F("AT+HTTPACTION=1"));
    delay(500); //absolute minumu 5000ms
    mySerial.println(F("AT+HTTPREAD"));
    delay(100); //absolute minumu 5000ms
    ShowResponse();
    Serial.println("");
  }

void ShowResponse(){
  while(mySerial.available()>0){ 
    Serial.write(mySerial.read());
    delay(20);
  }  
}

for this same code to work again now i have to omit the AT+HTTPSSL=1 part and use HTTP instead of HTTPS

I will check the Product Identification (ATI command) for the SIM800L modules I have, and check what firmware is installed then get back to you on that. I guess I should update the firmware. is that right?

thanks Vinod

@Christopher I have updated the code to match to the latest Tingspeak examples. Please see the code below. Also Updated NodeMCU ESP8266 module with the latest firmware.

I still get folloiwing error when it tries to read an integer filed:

>>Problem reading channel. HTTP error code -301

I have also tried with a different WIFI device (My phone's hotspot), the same result. It can connect to the router but can't send/recieve data from Thingspeak.

bool sendIntToThingspeak_T(int fieldID, int value)
{
    if(WiFi.status() == WL_CONNECTED)
    {
        // Write to ThingSpeak. There are up to 8 fields in a channel, allowing you to store up to 8 different
        // pieces of information in a channel.  Here, we write to field 1.

          int x = ThingSpeak.writeField(homeSweetHomeChannelNumber, fieldID, value, readAPIKey);
          if(x == 200)
          {
              Serial.println("Channel update successful.");
          }
          else
              Serial.println("Problem updating channel. HTTP error code " + String(x));
      }
      return false;
  }

bool getIntFromThingspeak_T(int fieldID, int & value)
{
    if(WiFi.status() == WL_CONNECTED)
    {
        // Use WiFiClient class to create TCP connections

          float valueOut = ThingSpeak.readLongField(homeSweetHomeChannelNumber, fieldID, readAPIKey);

          // Check the status of the read operation to see if it was successful
          int statusCode = ThingSpeak.getLastReadStatus();
          if(statusCode == 200)
          {
              value = valueOut;
              SERIAL_PRINTLN("VentBot remainting: " + String(valueOut));
              return true;
          }
          else
              SERIAL_PRINTLN("Problem reading channel. HTTP error code " + String(statusCode)); 
      }
      return false;
  }