ESP32-cam experienced a 'Guru Meditation Error: Core 1 panic'ed (Interrupt wdt timeout on CPU1).' while using publish method

[LZY-SPCA]

I tried to use HC-SR501, camera and MQTT to make a smart home sensory node. After the sensor triggered irq, the isr set a flag to true and then the loop will check the flag and try to publish a message. But during the publish process, the system paniced.

[EFWob]

Hi there,

sorry to hear that. Unfortunately I can not give any meaningful hint on that from my perspective:

• I don't know your sketch :-)
• memory is always an issue on ESP32, even more so on ESP32CAM
• if you look at the source, you will notice that publish() is not implemented by this library itself, but by the underlying pubsubclient-library.

So most likely the issue can not be fixed by any fix on this library. For further investigation:

• did you check the available (heap)-memory?
• are you sure interrupts are not disabled (as the wdt timer is not fed)
• did you try any publish (without waiting for the interrupt flag from HC-SR501)?

On a side note: I found the HC-SR501 to be very unreliable (false triggers) and power consuming (not suitable for battery usage). I found a better solution with Panasonic PIRs (for instance EKMB1301111K, see https://asset.conrad.com/media10/add/160267/c1/-/en/001541128DS01/datenblatt-1541128-panasonic-pir-bewegungssensor-ekmb1301111k-23-4-v-1-st.pdf). Note that I am in no way affiliated with Panasonic. There might be others equally good by other manufactureres as well of course that I don't know.