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feat: raspberry pi led flash codes

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Michele Cereda
2023-05-22 00:53:26 +02:00
parent 0e0462bb93
commit 29067d4cf4
1 changed files with 33 additions and 2 deletions
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35
knowledge base/raspberry pi os.md
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@@ -21,7 +21,8 @@
1. [Firewall settings](#firewall-settings)
1. [Store files on the SD even when the overlay file system is active](#store-files-on-the-sd-even-when-the-overlay-file-system-is-active)
1. [Disable automatic upgrades](#disable-automatic-upgrades)
1. [Troubleshooting](#troubleshooting)
1. [Troubleshooting](#troubleshooting)
1. [LED warning flash codes](#led-warning-flash-codes)
1. [Issues connecting to WiFi network using roaming features or WPA3](#issues-connecting-to-wifi-network-using-roaming-features-or-wpa3)
1. [Further readings](#further-readings)
1. [Sources](#sources)
@@ -297,7 +298,35 @@ Using **_mask_** to prevent the above services from being re-enabled by some dep
Notice those are two separate services; they both run `/usr/lib/apt/apt.systemd.daily`, a shell script, with parameters install and update.
### Troubleshooting
## Troubleshooting
### LED warning flash codes
If a Raspberry Pi fails to boot or has to shut down for some reason, in most cases it will flash a LED a specific number of times to indicate what happened.<br/>
The LED will blink for a number of long flashes (0 or more), then short flashes, to indicate the exact status. In most cases, the pattern will repeat after a 2 second gap.
See the [configuration] page for updated information.
| Long flashes | Short flashes | Status | Notes |
| ------------ | ------------- | -------------------------------------- | --------- |
| 0 | 3 | Generic failure on boot | |
| 0 | 4 | `start*.elf` not found | |
| 0 | 7 | Kernel image not found | |
| 0 | 8 | SDRAM failure | |
| 0 | 9 | Insufficient SDRAM | |
| 0 | 10 | In HALT state | |
| 2 | 1 | Partition not FAT | |
| 2 | 2 | Failed to read from partition | |
| 2 | 3 | Extended partition not FAT | |
| 2 | 4 | File signature/hash mismatch | Pi 4 only |
| 3 | 1 | SPI EEPROM error | Pi 4 only |
| 3 | 2 | SPI EEPROM is write protected | Pi 4 only |
| 3 | 3 | I2C error | Pi 4 only |
| 3 | 4 | Secure-boot configuration is not valid | |
| 4 | 4 | Unsupported board type | |
| 4 | 5 | Fatal firmware error | |
| 4 | 6 | Power failure type A | |
| 4 | 7 | Power failure type B | |
### Issues connecting to WiFi network using roaming features or WPA3
@@ -329,6 +358,7 @@ Long term solution: none currently known.
- [`rfkill`][rfkill]
- [Country code search]
- [`k3s`][k3s]
- [Configuration]
## Sources
@@ -340,6 +370,7 @@ Long term solution: none currently known.
<!-- project's references -->
[/boot/config.txt]: https://www.raspberrypi.org/documentation/configuration/config-txt/README.md
[configuration]: https://www.raspberrypi.com/documentation/computers/configuration.html
[overclocking]: https://www.raspberrypi.org/documentation/configuration/config-txt/overclocking.md
<!-- internal references -->