Hello,
try bellow code, works for me.
#include <WiFiClientSecure.h> // you need this library, cos Thingspeak use SSL protocoal, so standard WIFIClient is not able to connect there
const char* ssid = "SSID name";
const char* password = "your password";
WiFiClientSecure client;
void connectToWIFI() {
Serial.print("Attempting to connect to SSID: ");
Serial.println(ssid);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(WiFi.status());
delay(1000);
}
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void setup() {
Serial.begin(115200);
connectToWIFI();
}
void loop() {
httpRequestData = "api_key=YOURAPIKEY&field1=22.32&field22=12.89; //up to field 8
responseTime = millis();
Serial.println(" Starting connection to server thingspeak");
Serial.println(httpRequestData);
client.setInsecure(); //skip SSL verification
if (!client.connect("api.thingspeak.com", 443, 10000)) {
Serial.println("Connection failed! Reconnect!");
connectToWIFI();
} else {
Serial.print(" Connected to server!");
client.println("GET https://api.thingspeak.com/update?" + httpRequestData + " HTTP/1.0");
client.println("Host: api.thingspeak.com");
client.println("Connection: close");
client.println();
while (client.connected()) {
String line = client.readStringUntil('\n');
if (line == "\r") {
Serial.print(" Headers received "); // or display lito to get return code
break;
}
}
Serial.println(millis() - responseTime); //response time in miliseconds
client.stop();
}
}
be carefully, today i found, that only one request per 15 seconds can be send
