Description: After a Wemos Lolin D1 Mini Pro V2 successfully connects to WiFi, it attempts to connect to a public Waves Node (nodes.wavesnodes.com) on Port 80 every 5 seconds. Two green LEDs should both turn ON if all goes well.
Notes: Port 80 is used for an HTTP connection. It enables unsecured data transmission in plain text. Make sure to set the baud rate to 115200 in the Serial Monitor.
Supplies:
1 – Breadboard 400 Points
1 – Wemos Lolin D1 Mini Pro V2
2 – LEDs
1 – 220 Ohm Resistor
Arduino Code:
#include <ESP8266WiFi.h> // Wi-Fi settings const char *ssid = "Network Name"; const char *password = "password"; // Waves public node URI const char *host = "nodes.wavesnodes.com"; const int port = 80; #define led1 4 #define led2 5 void setup() { Serial.begin(115200); Serial.println(); Serial.println(); pinMode(led1, OUTPUT); pinMode(led2, OUTPUT); if (ssid == ""){ Serial.println("WiFi ssid is empty."); } connectToWiFi(); } void loop() { // Check WiFi connection and reconnect if needed if (WiFi.status() != WL_CONNECTED){ WiFi.disconnect(); digitalWrite(led1, LOW); digitalWrite(led2, LOW); connectToWiFi(); } WiFiClient client; Serial.printf("\nConnecting to %s ... ", host); if (client.connect(host, port)) { Serial.println("connected"); digitalWrite(led2, HIGH); } else { Serial.println("connection failed"); client.stop(); } // Wait for the 5 sec. before next check delay(5000); } void connectToWiFi(){ Serial.printf("Connecting to %s ", ssid); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(" connected"); digitalWrite(led1, HIGH); }