esp32_ota
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esp32_ota [2024/03/19 18:36] sausage [The stock firmware] |
esp32_ota [2024/03/20 01:50] (current) sausage [ESP32 OTA and Rollbacks - What happens under the hood?] |
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| Over The Air (OTA) provides a way to send firmware to your ESP32 board in the field without the need for a cable and physical access to the device. | Over The Air (OTA) provides a way to send firmware to your ESP32 board in the field without the need for a cable and physical access to the device. | ||
| - | The purpose of this article is manually step through the various stages of the OTA process and illustrate the state of the ESP32 at each stage. | + | The purpose of this article is to manually step through the various stages of the OTA process and illustrate the state of the ESP32 at each stage. |
| Together we will set up a number of firmwares suitable for testing on different partitions in flash memory. | Together we will set up a number of firmwares suitable for testing on different partitions in flash memory. | ||
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| </code> | </code> | ||
| - | Ignoring the ''nvs'' and ''phy_init'' partitions, we have the default ''factory'' partition that starts at 0x10000. Ironically, the list of partitions doesn't list the bootloader partition at 0x1000 or the partition that the partition table itself is stored on (at 0x8000). | + | Ignoring the ''nvs'' and ''phy_init'' partitions, we have the default ''factory'' partition that starts at 0x10000. Ironically, the list of partitions doesn't list the bootloader partition at 0x1000 or the partition that the partition table itself is stored (at 0x8000). |
| ===== OTA partitions ===== | ===== OTA partitions ===== | ||
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| - 4blinks.bin | - 4blinks.bin | ||
| - | Now the ''idf.py flash'' command is only able to flash the default project firmware to the ''factory'' partition. So we'll need to switch to a different command to flash a named firmware to a particular partition. | + | Note that the ''idf.py flash'' command is only able to flash the default project firmware to the ''factory'' partition. So we'll need to switch to a different command to flash a named firmware to a particular partition. |
| Take another look at our partitions table. | Take another look at our partitions table. | ||
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| All our firmwares failed to run the ''esp_ota_mark_app_valid_cancel_rollback()'' to mark the ''otadata'' as valid. So in each case, they have become aborted and rolled back to the previously known good firmware. | All our firmwares failed to run the ''esp_ota_mark_app_valid_cancel_rollback()'' to mark the ''otadata'' as valid. So in each case, they have become aborted and rolled back to the previously known good firmware. | ||
| - | The ''factory'' firmware isn't controlled by the ''otadata'', the rollback process or OTA at all. | + | The ''factory'' firmware isn't affected by ''otadata'', or the rollback process, or OTA at all. |
| To finish up, let's take a last look at the raw otadata: | To finish up, let's take a last look at the raw otadata: | ||
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| Have fun! | Have fun! | ||
| + | |||
| + | ===== Troubleshooting ===== | ||
| + | //The gen_esp32part.py command isn't found.// | ||
| + | |||
| + | For some reason, gen_esp32part.py is not added to your path by default when starting your ESP-IDF console. For Powershell add the following to line 59 of your ''frameworks\esp-idf-v5.2\export.ps1'' file: | ||
| + | |||
| + | function gen_esp32part.py { &python "$IDF_PATH\components\partition_table\gen_esp32part.py" $args } | ||
| + | |||
| + | For Windows Command Prompt, in ''frameworks\esp-idf-v5.2\export.bat'' add to line 66: | ||
| + | |||
| + | DOSKEY gen_esp32part.py=python.exe "%IDF_PATH%\components\partition_table\gen_esp32part.py" $* | ||
| + | |||
| + | For shell and fish terminals, it's the same deal. | ||
| ===== More reading ===== | ===== More reading ===== | ||
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| ===== Thank yous ===== | ===== Thank yous ===== | ||
| - | Many thanks to boarchuz and craig from the [[https://discord.gg/wwK29JJV|Espressif MCUs]] discord server for their advice on details in this article. | + | Many thanks to boarchuz and craig from the [[https://discord.gg/wwK29JJV|Espressif MCUs]] discord server for their assistance with this article. |
esp32_ota.1710873390.txt.gz ยท Last modified: 2024/03/19 18:36 by sausage
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