ESP32 OTA Partition Table Mismatch

In this tutorial, you'll learn about ESP32 OTA Partition Table Mismatch. We cover key concepts, practical examples, and best practices.

The Problem

ESP32 OTA update fails because firmware binary was built for a different partition table.

Quick Fix

Wrong

// Using default 2MB partition, but firmware targets 4MB

esp_ota_begin: partition not found. Update fails.

Right

// Check partition table before OTA
const esp_partition_t* partition = esp_ota_get_next_update_partition(NULL);
if (partition == NULL) {
  Serial.println("No OTA partition available");
}
// Print partition info
Serial.printf("Partition: %s, size: %d\n",
  partition->label, partition->size);
Update.begin(partition->size);

Partition: ota_1, size: 2097152
Update ready for 2MB OTA partition

Prevention

Match partition scheme between build config and hardware. Use ESP32 partition table editor in Arduino IDE. Verify flash size with ESP.getFlashChipSize(). Check partition layout with esptool.py read_flash.

DodaTech engineers apply these same patterns across Doda Browser, DodaZIP, and Durga Antivirus Pro for production IoT reliability.

FAQ