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[ota] Scale ESP-IDF OTA erase watchdog to image size (#16998)

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Jonathan Swoboda
2026-06-16 13:23:46 -04:00
committed by GitHub
parent ce11d38c9b
commit 29e8949e3e
1 changed files with 12 additions and 1 deletions
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13
esphome/components/ota/ota_backend_esp_idf.cpp
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@@ -57,7 +57,18 @@ OTAResponseTypes IDFOTABackend::begin(size_t image_size, ota::OTAType ota_type)
return OTA_RESPONSE_ERROR_NO_UPDATE_PARTITION;
}
watchdog::WatchdogManager watchdog(15000);
// esp_ota_begin() erases the destination region, which blocks loopTask and
// scales with the erase size -- a fixed watchdog overruns on large OTA slots.
// An unknown size (0, e.g. web_server uploads) erases the whole partition, so
// budget against the bytes actually erased. ~10ms/KiB (conservative
// ~100 KiB/s erase) over a 15s floor; panic stays on so a stuck erase still
// resets rather than hanging forever.
size_t erase_size = image_size;
if (erase_size == 0 || erase_size > this->partition_->size) {
erase_size = this->partition_->size;
}
const uint32_t erase_budget_ms = 15000 + (erase_size >> 10) * 10;
watchdog::WatchdogManager watchdog(erase_budget_ms);
esp_err_t err = esp_ota_begin(this->partition_, image_size, &this->update_handle_);
if (err != ESP_OK) {