The ESPconfig library by Peter Dunne simplifies configuration of ESP8266 and ESP32 devices. It supports WiFi setup, OTA updates, and web-based management. The library allows operation in WiFi client, access point, and relay modes.
- WiFi Client Mode (Connect to WiFi)
- Access Point (AP) Mode (Configuration Portal)
- Relay Mode (Extends WiFi coverage)
Source Code: ESPconfig GitHub
#include "sysconfig8266.h";
void setup() {
Serial.begin(115200);
sysConfig.init();
Serial.println("Ready.");
}
void loop() {
sysConfig.run();
}
The ESPconfig library initializes WiFi, OTA, NTP, and optional Bluetooth (ESP32 only). It runs a web-based configuration portal if WiFi credentials are missing or connection fails.
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// Connect ESP8266 to an existing WiFi network
#include <ESP8266WiFi.h>
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
Serial.println("Connecting to WiFi...");
while (WiFi.status() != WL_CONNECTED) { delay(1000); Serial.print("."); }
Serial.println("\nWiFi connected.");
Serial.print("IP Address: ");
Serial.println(WiFi.localIP());
}
void loop() { }
Connects ESP8266 to a WiFi network and prints its IP address.
// ESP8266 as WiFi Access Point with web server
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
const char* ssid = "ESP8266_Access_Point";
const char* password = "12345678";
ESP8266WebServer server(80);
void handleRoot() { server.send(200, "text/plain", "Hello from ESP8266!"); }
void setup() {
Serial.begin(115200);
WiFi.softAP(ssid, password);
Serial.print("Access Point IP: "); Serial.println(WiFi.softAPIP());
server.on("/", handleRoot);
server.begin();
Serial.println("Web server started.");
}
void loop() { server.handleClient(); }
ESP8266 creates a WiFi network and runs a basic web server.
// ESP8266 as Client and AP simultaneously
#include <ESP8266WiFi.h>
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
const char* apSSID = "ESP8266_Relay";
const char* apPassword = "relay_pass";
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) { delay(1000); Serial.print("."); }
Serial.println("\nConnected to WiFi. IP: "); Serial.println(WiFi.localIP());
WiFi.softAP(apSSID, apPassword);
Serial.print("Access Point IP: "); Serial.println(WiFi.softAPIP());
}
void loop() { }
Extends WiFi coverage by acting as both client and access point.
