Compiling temperature and voltage

Hi ALL!!!
I manage to make two programming codes that can send parameter value; temperature and voltage of solar panel to my account at via GPRS. However, I find some difficulties to compile both programming codes together (temperature programming code and voltage programming code).
i’m really appreciated with help from experts or people who are willing to help :slight_smile:

temperature.ino (4.53 KB)

voltage.ino (4.78 KB)

, I find some difficulties to compile both programming codes together

Try reading:-

It’s a very inefficient code, but I think it should work:

#include <GSM.h>

// Xively Client data
#define APIKEY         "jJh1LRe0FzWrCbtJxGyOLB4jCoTYf5VfKidWwxnHYFfLPQMS"  // replace your xively api key here
#define FEEDID         396582937                     // replace your feed ID
#define USERAGENT      "My Project"              // user agent is the project name

// PIN Number
#define PINNUMBER ""

// APN data
#define GPRS_APN       "my3g"  // replace your GPRS APN
#define GPRS_LOGIN     ""     // replace with your GPRS login
#define GPRS_PASSWORD  ""  // replace with your GPRS password

// initialize the library instance:
GSMClient client;
GPRS gprs;
GSM gsmAccess;

// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
// IPAddress server(216,52,233,121);    // numeric IP for
char server[] = "";      // name address for xively API

unsigned long lastConnectionTime = 0;         // last time you connected to the server, in milliseconds
boolean lastConnected = false;                  // state of the connection last time through the main loop
const unsigned long postingInterval = 10*1000;  //delay between updates to

void setup()
  // initialize serial communications and wait for port to open:
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  // connection state
  boolean notConnected = true;
  // After starting the modem with GSM.begin()
  // attach the shield to the GPRS network with the APN, login and password
    if((gsmAccess.begin(PINNUMBER)==GSM_READY) &
      notConnected = false;
      Serial.println("Not connected");

void loop()
  // read the analog sensor:
  int dout = analogRead(A0); 
  float volt = dout*0.00488;    // to get voltage multiply analog with resolution 
  float temp = volt*100;    
  // read the analog sensor:
  int val = analogRead(A2);  // read the value from the sensor (voltage)
  float volts = ((val / resistorFactor) * referenceVolts) * 470 ; // calculate the ratio

  // if there's incoming data from the net connection.
  // send it out the serial port.  This is for debugging
  // purposes only:
  if (client.available())
     char c =;

  // if there's no net connection, but there was one last time
  // through the loop, then stop the client:
  if (!client.connected() && lastConnected)
  // if you're not connected, and ten seconds have passed since
  // your last connection, then connect again and send data:
  if(!client.connected() && ((millis() - lastConnectionTime) > postingInterval))
  sendData("Temp", 4, temp);
  sendData("Volts", 5, volts);
  // store the state of the connection for next time through
  // the loop:
  lastConnected = client.connected();

  This method makes a HTTP connection to the server.
void sendData(char* label, int labelLength, int thisData)
  // if there's a successful connection:
  if (client.connect(server, 80))
    // send the HTTP PUT request:
    client.print("PUT /v2/feeds/");
    client.println(".csv HTTP/1.1");
    client.print("X-ApiKey: ");
    client.print("User-Agent: ");
    client.print("Content-Length: ");

    // calculate the length of the sensor reading in bytes:
    // 8 bytes for "sensor1," + number of digits of the data:
    int thisLength = labelLength + 2 + getLength(thisData);

    // last pieces of the HTTP PUT request:
    client.println("Content-Type: text/csv");
    client.println("Connection: close");
    // here's the actual content of the PUT request:
    client.print(", ");
    // if you couldn't make a connection:
    Serial.println("connection failed");
  // note the time that the connection was made or attempted
  lastConnectionTime = millis();

  This method calculates the number of digits in the
  sensor reading.  Since each digit of the ASCII decimal
  representation is a byte, the number of digits equals
  the number of bytes.
int getLength(int someValue)
  // there's at least one byte:
  int digits = 1;
  // continually divide the value by ten, 
  // adding one to the digit count for each
  // time you divide, until you're at 0:
  int dividend = someValue /10;
  while (dividend > 0)
    dividend = dividend /10;
  // return the number of digits:
  return digits;

Hi Luis:
I have the same problem; however I want to monitor temperature and relative humidity with DHT11.
I use the code you shared.
But, basically, the loop only transmits the first variable to Xively (humidity).

sendData (“Humid”, 5, h);
sendData (“Temp”, 4, t);

You can give me some advice to me, please :~.
(attached my code)

SensorGSMTyHXively.ino (4.55 KB)

I don't have the module, so, I don't try the sample. As the OP don't give any feedback I assume that the problem get solved.