Tuya integration causes devices to fail (excess memory use?) and node loses connection

[cgloogs]

Hi,

I have been happily using the node to integrate with a variety of Tuya devices.

But I'm having problems with a couple of new devices:

• a "Human Presence Sensor Tuya/Zigbee Millimeter Radar Wave Presence Detection Sensor"
• a Candeo Dimming Smart Plug

Although the integration intially works, these disconnect regularly (especially the Dimming Smart Plug) and often in a way that will only reconnect if I restart the Node-Red flows (the nodes get stuck in a state of CONNECTING or an endless loop of DISCONNECTED/ERROR/CONNECTING). I've built an automation that restarts the flows if a Tuya node remains unconnected for too long, but it's a bit tiresome. Sometimes the Smart Plug "breaks" altogether and I have to turn it off at the wall.

What I've noticed from the Tuya development debug logs is that, while the Node-Red flow is actively connecting and reconnecting to the device, its available memory is rapidly depleted until it restarts itself (or just goes offline); look at the "Remaining memory" in these hourly semaphore logs from the Tuya Developer Platform:

Time	Device Event	DP ID	Event Details	Source
03/07/24 23:57:35	Device restart	Device restart	hardware watchdog reset	device itself
04/07/24 00:57:19	Device semaphore	Device semaphore	signal intensity:-51||Remaining memory:24168||UTC:1720051039||DST:1720054639	device itself
04/07/24 01:57:19	Device semaphore	Device semaphore	signal intensity:-52||Remaining memory:12600||UTC:1720054639||DST:1720058239	device itself
04/07/24 02:57:19	Device semaphore	Device semaphore	signal intensity:-55||Remaining memory:704||UTC:1720058239||DST:1720061839	device itself
04/07/24 03:00:21	Offline	Offline	closed	device itself
04/07/24 03:00:21	Online	Online		device itself

until it restarts itself (and Node-Red flows subequently have to be restarted to re-establish a connection).

If I disable the Tuya-Smart-Device node and leave the plug alone, its memory stays static ("Remaining memory:36200" every hour).

The Human Presence sensor has the same issue: depleting memory on the device and it periodically restarting itself resulting in the Node-Red Tuya node being unable to reconnect.

Has anyone seen this with their devices?
Do you know what might cause it - or is there a way I can debug what is going on?

For information, I have v5.3.0 of the node and am assuming it's correct to use Tuya Protocol v3.1.

Thanks,

Chris