ESP32 NVS Commit Fails with Error

In this tutorial, you'll learn about ESP32 NVS Commit Fails with Error. We cover key concepts, practical examples, and best practices.

The Problem

ESP32 NVS commit returns error codes and data is not saved to flash.

Quick Fix

Wrong

nvs_set_i32(handle, 'x', 1);
nvs_commit(handle);  // Ignores error return

Commit silently fails. Data not persisted.

Right

esp_err_t err = nvs_set_i32(handle, 'x", 1);
if (err != ESP_OK) {
  Serial.printf("Set error: %s\n", esp_err_to_name(err));
}
err = nvs_commit(handle);
if (err == ESP_OK) {
  Serial.println("Commit successful");
} else {
  Serial.printf("Commit failed: %s\n', esp_err_to_name(err));
  // May need to re-open namespace
}

Commit successful
(Data persisted to NVS flash storage)

Prevention

Check return code of every NVS operation. ESP_ERR_NVS_INVALID_HANDLE means handle is stale. ESP_ERR_NVS_NOT_ENOUGH_SPACE means NVS is full. ESP_ERR_NVS_WRONG_TYPE means key exists with different type.

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

FAQ