I'm also a newbie progammer and am also having problems with this and was hoping someone can point me in the right direction.

I have a K3 Key Box (https://www.tuyaexpo.com/product/946025), connected up via a gateway. I've enabled the "Smart Lock Open Service" and managed to sort out the encryption nightmare, and am able to get back what look like success results from the API for creating a new temporary PIN and even for deleting the PIN out too.

However, when it sends the payload to the device, the keybox audibly says "Operation Failed" (but nothing in the log to say it failed, except it doesn't take the new pin, so it did fail).

The API says its all good, but the device itself said it's failed.

I can see the commands in the device log (so I am close!) but it doesn't seem to like the commands being issued to the device.

Does anyone have any experience with this?