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Only loop() is subscribed. setConnected() runs on the WiFi event task and reached SocketEmitter::endEmit(), whose plain esp_task_wdt_reset() logged "esp_task_wdt_reset(707): task not found" on every boot. The web and socket handlers on async_tcp did the same. /scanaps on async_tcp called esp_task_wdt_add(NULL) after the scan, subscribing a task that nothing resets, so the board could panic 15 s after a scan from the UI. TaskWdt.h resets only a subscribed task and re-adds a task after a long call only when it was watched before. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
21 lines
983 B
C
21 lines
983 B
C
#ifndef TASK_WDT_H
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#define TASK_WDT_H
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#include <esp_task_wdt.h>
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// Task watchdog calls that are safe from any task.
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//
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// Only loop() is subscribed to the watchdog. Code it shares with other tasks
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// is not: the WiFi event task runs ESPNetwork::setConnected() and async_tcp
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// runs the web and socket handlers. A plain esp_task_wdt_reset() there logs
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// "esp_task_wdt_reset(707): task not found", and an esp_task_wdt_add() there
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// subscribes a task that nothing resets, so it panics once the timeout runs out.
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// Resets the watchdog if the calling task is subscribed to it.
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inline void resetTaskWdt() {
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if(esp_task_wdt_status(NULL) == ESP_OK) esp_task_wdt_reset();
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}
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// Stops watching the calling task around a call that blocks past the timeout.
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// True when it was watched, so resumeTaskWdt() knows to add it back.
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inline bool pauseTaskWdt() { return esp_task_wdt_delete(NULL) == ESP_OK; }
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inline void resumeTaskWdt(bool paused) { if(paused) esp_task_wdt_add(NULL); }
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#endif
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