---
id: error-codes
title: Critical Error Codes
sidebar_label: Error Codes
sidebar_position: 4
---

The device might report these fault codes on the screen, but it will also be outputted on the device serial output. If you encounter a fault code, please post on the forum and we'll try to help.

:::note
This table is derived from the [protobufs](https://buf.build/meshtastic/protobufs/docs/main:meshtastic#meshtastic.CriticalErrorCode)
:::

|        Name         | Number | Description                                                                                                                                                                                                                     |
| :-----------------: | :----: | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
|     TxWatchdog      |   1    | A software bug was detected while trying to send LoRa                                                                                                                                                                           |
|   SleepEnterWait    |   2    | A software bug was detected on entry to sleep                                                                                                                                                                                   |
|       NoRadio       |   3    | No LoRa radio hardware could be found                                                                                                                                                                                           |
|     Unspecified     |   4    | Not normally used                                                                                                                                                                                                               |
|   UBloxInitFailed   |   5    | We failed while configuring a UBlox GPS                                                                                                                                                                                         |
|      NoAXP192       |   6    | This board was expected to have a power management chip and it is missing or broken                                                                                                                                             |
| InvalidRadioSetting |   7    | The channel tried to set a radio setting which is not supported by this chipset, radio comms settings are now undefined                                                                                                         |
|   TransmitFailed    |   8    | Radio transmit hardware failure. We sent data to the radio chip, but it did not reply with an interrupt                                                                                                                         |
|      Brownout       |   9    | We detected that the main CPU voltage dropped below the minimum acceptable value                                                                                                                                                |
|    SX1262Failure    |   10   | Selftest of SX1262 radio chip failed                                                                                                                                                                                            |
|     RadioSpiBug     |   11   | A (likely software but possibly hardware) failure was detected while trying to send packets. If this occurs on your board, please post in the forum so that we can ask you to collect some information to allow fixing this bug |
