Update ThingSpeak channel and getting talkBack commands in the same program using arduino Mega2560 and Arduino 101 WiFi shield | Arduino | Forum

Try this:

#include
#include
#include "secrets.h"

char ssid[] = SECRET_SSID; // your network SSID (name)
char pass[] = SECRET_PASS; // your network password

WiFiClient client;

unsigned long myChannelNumber = SECRET_CH_ID;
const char * myWriteAPIKey = SECRET_WRITE_APIKEY;
const char * myTalkbackKey = SECRET_TALKBACK_APIKEY;

// some values to send to ThingSpeak
int number1 = 0;
int number2 = random(0,100);
int number3 = random(0,100);
int number4 = random(0,100);

void setup() {
Serial.begin(115200);
}

void loop() {

// Connect or reconnect to WiFi
if(WiFi.status() != WL_CONNECTED){
Serial.print("Attempting to connect to SSID: ");
Serial.println(SECRET_SSID);
while(WiFi.status() != WL_CONNECTED){
WiFi.begin(ssid, pass);
Serial.print(".");
delay(5000);
}
Serial.println("
Connected.");
}

// Create the message body for the POST out of the values
String postMessage = String("field1=") + String(number1) +
String("&field2=") + String(number2) +
String("&field3=") + String(number3) +
String("&field4=") + String(number4) +
String("&apikey=") + String(myWriteAPIKey) +
String("&talkback_key=") + String(myTalkbackKey);

// make a String for any commands that might be in the queue
String newCommand = String();

// make the POST to ThingSpeak
int x = httpPOST(postMessage, newCommand);
client.stop();

// Check the result
if(x == 200){
Serial.println("Channel update successful, checking queue...");

// check for a command returned from Talkback
if(newCommand.length() != 0){
Serial.print(" do this: ");
Serial.println(newCommand);
}
else{
Serial.println(" do nothing.");
}

}
else{
Serial.println("Problem updating channel. HTTP error code " + String(x));
}

// change the values to prove things are happening
number1++;
if(number1 > 99){
number1 = 0;
}
number2 = random(0,100);
number3 = random(0,100);
number4 = random(0,100);

delay(20000); // Wait 20 seconds to update the channel again
}

// general function to POST to ThingSpeak
int httpPOST(String postMessage, String &response){

bool connectSuccess = false;
connectSuccess = client.connect("api.thingspeak.com",80);

if(!connectSuccess){
return -301;
}

postMessage += "&headers=false";

String Headers = String("POST /update HTTP/1.1
") +
String("Host: api.thingspeak.com
") +
String("Content-Type: application/x-www-form-urlencoded
") +
String("Connection: close
") +
String("Content-Length: ") + String(postMessage.length()) +
String("

");

client.print(Headers);
client.print(postMessage);

long startWaitForResponseAt = millis();
while(client.available() == 0 && millis() - startWaitForResponseAt < 5000){
delay(100);
}

if(client.available() == 0){
return -304; // Didn't get server response in time
}

if(!client.find(const_cast("HTTP/1.1"))){
return -303; // Couldn't parse response (didn't find HTTP/1.1)
}

int status = client.parseInt();
if(status != 200){
return status;
}

if(!client.find(const_cast("

"))){
return -303;
}

String tempString = String(client.readString());
response = tempString;

return status;

}

Here are the contents of the secrets.h

// Use this file to store all of the private credentials
// and connection details

#define SECRET_SSID "MySSID" // replace MySSID with your WiFi network name
#define SECRET_PASS "MyPassword" // replace MyPassword with your WiFi password

#define SECRET_CH_ID 0000000 // replace 0000000 with your channel number
#define SECRET_WRITE_APIKEY "XYZ" // replace XYZ with your channel write API Key

#define SECRET_TALKBACK_APIKEY "ABC" // replace ABC with your talkback key