// thingSpeakRemote.ino - ESP8266 / NodeMCU.
// Identical logic; only the Wi-Fi header and the pin name change.
#include <ESP8266WiFi.h>
#include <ThingSpeak.h>
const char* ssid = "YOUR_WIFI_NAME";
const char* password = "YOUR_WIFI_PASSWORD";
const unsigned long CHANNEL_ID = 0000000;
const char* READ_API_KEY = "YOUR_READ_API_KEY";
const unsigned int FIELD = 1;
// D7 on the NodeMCU silkscreen is GPIO13. Either name compiles on this core;
// the GPIO number is what the chip and every datasheet mean.
const int OUTPUT_PIN = 13;
WiFiClient client;
void setup() {
Serial.begin(115200);
pinMode(OUTPUT_PIN, OUTPUT);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); }
Serial.println();
Serial.print("connected, IP = ");
Serial.println(WiFi.localIP());
ThingSpeak.begin(client);
}
void loop() {
long value = ThingSpeak.readLongField(CHANNEL_ID, FIELD, READ_API_KEY);
int status = ThingSpeak.getLastReadStatus();
if (status == 200) {
digitalWrite(OUTPUT_PIN, value ? HIGH : LOW);
Serial.print("field = ");
Serial.println(value);
} else {
Serial.print("read failed, status ");
Serial.println(status);
}
delay(20000);
}
