Data not shown correctly

2 次查看（过去 30 天）
Fiorenzo Daniele Giust
编辑： Christopher Stapels 2023-5-19
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
  1 个评论
Christopher Stapels
Christopher Stapels 2023-5-19
编辑：Christopher Stapels 2023-5-19
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?

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