ESP32 Loses Wi-Fi and Never Reconnects

In this tutorial, you'll learn about ESP32 Loses Wi. We cover key concepts, practical examples, and best practices.

The Problem

ESP32 disconnects from Wi-Fi after some time and stays disconnected, requiring a manual reset.

Quick Fix

Wrong

void loop() {
  // send sensor data
  delay(10000);
}

Wi-Fi disconnects after 5 minutes. Device sends no data. Manual reset required.

Right

void loop() {
  if (WiFi.status() != WL_CONNECTED) {
    WiFi.reconnect();
    int tries = 0;
    while (WiFi.status() != WL_CONNECTED && tries < 20) {
      delay(500); tries++;
    }
  }
  // send sensor data
  delay(500);
}

Reconnecting...
Connected to MyNetwork
Sensor data: temp=22.5C

Prevention

Call WiFi.setAutoReconnect(true) in setup. Check WiFi.status() in every loop iteration. Add exponential backoff between reconnection attempts. Use WiFi.onEvent() to register disconnection callbacks. Monitor RSSI and reconnect proactively on weak signal.

DodaTech engineers apply these same patterns when building Doda Browser's networking stack, DodaZIP's firmware packaging pipeline, and Durga Antivirus Pro's sensor communication layer.

FAQ