// Optional: Connect to a custom local server // Blynk.begin(auth, ssid, pass, "192.168.1.100", 8080);
void setup() Serial.begin(115200); delay(100); blynksimpleesp8266 h
It tells the Blynk engine how to send and receive data over Wi-Fi using the ESP8266's ESP8266WiFi.h and WiFiClient.h libraries. 2. When Should You Use This? (Important Version Note) ⚠️ CRITICAL: Blynk has two major versions. | Feature | Blynk Legacy (1.0) | Blynk IoT (2.0) | | :--- | :--- | :--- | | Header File | <BlynkSimpleEsp8266.h> | <BlynkSimpleEsp8266_SSL.h> or BlynkEdgent.h | | Auth Method | Static Auth Token | Dynamic Provisioning + Device ID/Token | | App | Blynk Legacy (blue icon) | Blynk IoT (new purple icon) | | Server | blynk-cloud.com:8080 | blynk.cloud:443 | // Optional: Connect to a custom local server // Blynk
✅ ❌ Do NOT use it for the new Blynk IoT platform. 3. Basic Code Structure Here is a minimal working example for connecting an ESP8266 to Blynk Legacy: (Important Version Note) ⚠️ CRITICAL: Blynk has two
// Your credentials from the Blynk app char auth[] = "YourAuthTokenHere"; char ssid[] = "YourWiFiSSID"; char pass[] = "YourWiFiPassword";
void setup() pinMode(D4, OUTPUT); Blynk.begin(auth, ssid, pass);