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Over-The-Air Code Updates (OTA) | NexaLearn IoT Lab | NexaLearn

Internet of Things (IoT)25 دقيقة

Over-The-Air Code Updates (OTA)

Upload new code to ESP32 via Wi-Fi without a USB cable.

Lesson Content

Over-The-Air (OTA) technology means that once you program the board to connect to the local network and enable the ArduinoOTA library, the board's name will appear as a network Port in the Ports menu in Arduino IDE. You can then update the code on a robot while it's moving around the room or on a wall-mounted device without connecting a cable.

Components Needed

ESP32

Code Example

#include <WiFi.h>
#include <ArduinoOTA.h>
void setup() {
  WiFi.begin("SSID", "PASS");
  while(WiFi.status() != WL_CONNECTED) delay(500);
  ArduinoOTA.begin();
}
void loop() {
  ArduinoOTA.handle();
}

Common Mistakes

Forgetting to put ArduinoOTA.handle() in the loop() function — without it the board cannot listen for new network update requests and you'll be forced to use the cable again.