Wemos D1 mini Pro with SHT3x Temperature sensor to ThingSpeak

temp.ino

#include <WEMOS_SHT3X.h>
SHT3X sht30(0x45);

// Wifi and ThingSpeak settings
#include <ESP8266WiFi.h>
 
const char* ssid = "";
const char* password = "";
 
const char* server = "api.thingspeak.com";
const char* api_key = "";

WiFiClient client;

void postData(float temperature, float humidity)
{
    // Send data to ThingSpeak
    if (client.connect(server, 80)) 
    {
        Serial.println("Connect to ThingSpeak - OK"); 
        
        String dataToThingSpeak = "";
        dataToThingSpeak+="GET /update?api_key=";
        dataToThingSpeak+=api_key;
         
        dataToThingSpeak+="&field1=";
        dataToThingSpeak+=String(temperature);
        
        dataToThingSpeak+="&field2=";
        dataToThingSpeak+=String(humidity);
         
        dataToThingSpeak+=" HTTP/1.1\r\nHost: a.c.d\r\nConnection: close\r\n\r\n";
        dataToThingSpeak+="";
        client.print(dataToThingSpeak);
        
        int timeout = millis() + 5000;
        while (client.available() == 0) 
        {
            if (timeout - millis() < 0) 
            {
                Serial.println("Error: Client Timeout!");
                client.stop();
                return;
            }
        }
    }
    
    while(client.available())
    {
        String line = client.readStringUntil('\r');
        Serial.print(line);
    }
}
 
void setup() {
    Serial.begin(115200);
    WiFi.begin(ssid, password);
}
 
void loop() {
    sht30.get();
    Serial.print("Temperature in Celsius : ");
    Serial.println(sht30.cTemp);
    Serial.print("Relative Humidity : ");
    Serial.println(sht30.humidity);
    Serial.println();
      
    postData(sht30.cTemp, sht30.humidity);

    delay(60000);
}