What is the maximum number of DPs supported by a module? Why can some modules of the same product not be paired?

Generally, a module supports no more than 40 DPs. If you configure more than 40 DPs, the module cannot be paired. If a module with more than 40 DPs cannot be paired, you can create a product with less than 40 DPs, and report the corresponding PID to the MCU. If the product can be paired, it indicates that the pairing error is caused by the exceeding of DPs. If you need to configure more than 40 DPs, contact Tuya personnel for firmware customization.