Chapter 2. API Reference
ESP_ERR_ULP_BRANCH_OUT_OF_RANGE (0x1205): Branch target is out of range of B instruction (try replacing
with BX)
ESP_ERR_OTA_BASE (0x1500): Base error code for ota_ops api
ESP_ERR_OTA_PARTITION_CONFLICT (0x1501): Error if request was to write or erase the current running
partition
ESP_ERR_OTA_SELECT_INFO_INVALID (0x1502): Error if OTA data partition contains invalid content
ESP_ERR_OTA_VALIDATE_FAILED (0x1503): Error if OTA app image is invalid
ESP_ERR_OTA_SMALL_SEC_VER (0x1504): Error if the firmware has a secure version less than the running
firmware.
ESP_ERR_OTA_ROLLBACK_FAILED (0x1505): Error if flash does not have valid firmware in passive partition
and hence rollback is not possible
ESP_ERR_OTA_ROLLBACK_INVALID_STATE (0x1506): Error if current active firmware is still marked in
pending validation state (ESP_OTA_IMG_PENDING_VERIFY), essentially first boot of firmware image post up-
grade and hence firmware upgrade is not possible
ESP_ERR_EFUSE (0x1600): Base error code for efuse api.
ESP_OK_EFUSE_CNT (0x1601): OK the required number of bits is set.
ESP_ERR_EFUSE_CNT_IS_FULL (0x1602): Error field is full.
ESP_ERR_EFUSE_REPEATED_PROG (0x1603): Error repeated programming of programmed bits is strictly for-
bidden.
ESP_ERR_CODING (0x1604): Error while a encoding operation.
ESP_ERR_NOT_ENOUGH_UNUSED_KEY_BLOCKS (0x1605): Error not enough unused key blocks available
ESP_ERR_DAMAGED_READING (0x1606): Error. Burn or reset was done during a reading operation leads to
damage read data. This error is internal to the efuse component and not returned by any public API.
ESP_ERR_IMAGE_BASE (0x2000)
ESP_ERR_IMAGE_FLASH_FAIL (0x2001)
ESP_ERR_IMAGE_INVALID (0x2002)
ESP_ERR_WIFI_BASE (0x3000): Starting number of WiFi error codes
ESP_ERR_WIFI_NOT_INIT (0x3001): WiFi driver was not installed by esp_wifi_init
ESP_ERR_WIFI_NOT_STARTED (0x3002): WiFi driver was not started by esp_wifi_start
ESP_ERR_WIFI_NOT_STOPPED (0x3003): WiFi driver was not stopped by esp_wifi_stop
ESP_ERR_WIFI_IF (0x3004): WiFi interface error
ESP_ERR_WIFI_MODE (0x3005): WiFi mode error
ESP_ERR_WIFI_STATE (0x3006): WiFi internal state error
ESP_ERR_WIFI_CONN (0x3007): WiFi internal control block of station or soft-AP error
ESP_ERR_WIFI_NVS (0x3008): WiFi internal NVS module error
ESP_ERR_WIFI_MAC (0x3009): MAC address is invalid
ESP_ERR_WIFI_SSID (0x300a): SSID is invalid
ESP_ERR_WIFI_PASSWORD (0x300b): Password is invalid
ESP_ERR_WIFI_TIMEOUT (0x300c): Timeout error
ESP_ERR_WIFI_WAKE_FAIL (0x300d): WiFi is in sleep state(RF closed) and wakeup fail
ESP_ERR_WIFI_WOULD_BLOCK (0x300e): The caller would block
ESP_ERR_WIFI_NOT_CONNECT (0x300f): Station still in disconnect status
Espressif Systems 1244
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