Miksi saan “ odotetun ensisijaisen lausekkeen ennen '. ' -tunnus ”?

Tiedän, että tämä on yleinen kysymys, mutta totuus on, että jokainen koodi on erilainen. Joskus on vaikeaa soveltaa käsitettä koodiin, se ei toimi. Joten auta minua. Mikä vikaa tässä koodissa? Sain sen GitHubilta. Yritän koota sen ensin, ennen kuin voin tehdä vähän muokkaus, se lähettää lämpötila- ja kosteustiedot ThingSpeak-pilvipalvelimille.

#include <DHT.h> // Including library for dht #include <ESP8266WiFi.h> String api_key = "YOUR API KEY"; // Enter your Write API key from ThingSpeak const char *ssid = "YOUR WIFI SSID"; // replace with your wifi ssid and wpa2 key const char *pass = "YOUR WIFI PASSWORD"; const char* server = "api.thingspeak.com"; #define DHTPIN 1 // pin where the dht11 is connected DHT dht; WiFiClient client; void setup() { Serial.begin(115200); delay(10); pinMode(2, OUTPUT); digitalWrite(2, 0); Serial.println("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, pass); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); } void loop() { int chk = DHT.read(DHTPIN); float hum = DHT.humidity; float temp = DHT.temperature; if (isnan(hum) || isnan(temp)) { Serial.println("Failed to read from DHT sensor!"); return; } if (client.connect(server, 80)) { // "184.106.153.149" or api.thingspeak.com String data_to_send = api_key; data_to_send += "&field1="; data_to_send += hum; data_to_send += "&field2="; data_to_send += temp; data_to_send += "\r\n\r\n"; client.print("POST /update HTTP/1.1\n"); client.print("Host: api.thingspeak.com\n"); client.print("Connection: close\n"); client.print("X-THINGSPEAKAPIKEY: " + api_key + "\n"); client.print("Content-Type: application/x-www-form- urlencoded\n"); client.print("Content-Length: "); client.print(data_to_send.length()); client.print("\n\n"); client.print(data_to_send); delay(1000); Serial.print("Temperature: "); Serial.print(temp); Serial.print(" degrees Celcius, Humidity: "); Serial.print(hum); Serial.println("%. Send to Thingspeak."); } client.stop(); Serial.println("Waiting..."); // ThingSpeak needs minimum 15 sec delay between updates, I"ve set it to 30 seconds delay(10000); } 

Kun käännän, saan tämän virheen,

 Arduino: 1.8.10 (Windows 10), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), 4MB (FS:2MB OTA:~1019KB), 2, v2 Lower Memory, Disabled, None, Only Sketch, 115200" C:\Users\Agent 96\Desktop\thingspeak\thingspeak.ino: In function "void loop()": thingspeak:37:20: error: expected primary-expression before "." token int chk = DHT.read(DHTPIN); ^ thingspeak:38:22: error: expected primary-expression before "." token float hum = DHT.humidity; ^ thingspeak:39:23: error: expected primary-expression before "." token float temp = DHT.temperature; ^ Multiple libraries were found for "DHT.h" Used: C:\Users\Agent Not used: C:\Users\Agent Multiple libraries were found for "ESP8266WiFi.h" Used: C:\Users\Agent exit status 1 expected primary-expression before "." token This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences. 

Ole hyvä ja auta, olen tavallaan aloittelija.