Data not shown correctly

When I read the data on the chart, each data are written on the same X axis (no trend shown)

The data are written every 2 minutes through an application running ESP8266.

This is part of the code written with Arduino IDE

rssi = WiFi.RSSI();

valPinAcqua = analogRead(PinAcqua);

valAcqua = map(valPinAcqua, 1024, 256, 0, 100); //converto il valore analogico in percentuale

checkCom = checkCom * (-1);

// Construct API request postStr

String postStr = writeAPIKey;

postStr +="&field1=";

postStr += String(valPinAcqua);

postStr +="&field2=";

postStr += String(valAcqua);

postStr +="&field3=";

postStr += String(rssi);

postStr +="&field4=";

postStr += String(checkCom);

postStr += "\r\n\r\n";

clientTHS.println("POST /update HTTP/1.1");

clientTHS.println("Host: api.thingspeak.com");

clientTHS.println("User-Agent: ESP8266 (nothans)/1.0");

clientTHS.println("Connection: close");

clientTHS.println("X-THINGSPEAKAPIKEY: " + writeAPIKey);

clientTHS.println("Content-Type: application/x-www-form-urlencoded");

clientTHS.println("Content-Length: " + String(postStr.length()));

clientTHS.println("");

clientTHS.print(postStr);

}

clientTHS.stop();

Thanks

Fiorenzo

[Christopher Stapels]

we strongly recomend using the ThingSpeak library for communication. Im not totally clear about your issue. Can you describe more what you are seeing, or show a screen shot, or share your channel ID if it is public?