Tuya devices broke

[Peter_Kawa]

Just FYI, I guessume you use(d) the Tuya Cloud Community app;
if so, one of these two situations below probably was the cause of “they stopped working”:
A. Your internet IP address was changed by your provider

@Jurgen_Heine

A2-a: When you entered your public IP address into the Cloud Application IP Allow list:

check if your public IP changed in the meantime, it happens. Adjust it in the allow list to fix it;
If not: most probably your IOT Core trial period expired, continue to A2-b please.

B. You forgot to extend the free trial period by another 6 months

@Jurgen_Heine

A2-b: No. After your API service expires, go to Cloud > My Services on the Tuya IoT Development Platform to request extending your IOT Core trial period by up to 6 months.

1. Click Extend Trial Period.

2. Complete this form.

3. You will get the result within one working day.

• The Trial Edition allows you to use all free API services but puts limits on the quota of API calls. For more information about the quota, see Pricing

.

@Rohnny_Stormo

not very proffesional​

Or you did not read the fine manual