Why can't I receive the sent data?

PSM-type terminals sleep deeply during non-business periods and do not receive downlink data. Only when the terminal actively sends uplink data (MO Data) can receive the downlink data buffered by the IoT platform.

1. App panel operation issued instructions, but the module did not send issued data. This is because the NB module is in PSM low power consumption mode, and peripherals such as radio frequency reception are turned off, and data cannot be received. The module must actively report data once and interact with Tuya Cloud once, the heartbeat cycle arrives to send a heartbeat or a local event triggers the wake-up module to send data, and the issued instruction that was stuck in the last operation will be issued. For multiple DP operations, multiple data will be issued, and only the latest operation will be issued for the same DP. When the heartbeat interval set by the module expires, the module will automatically interact with the platform once to maintain the heartbeat. At this time, the cached data is delivered.
2. If the device is offline, all issued commands cached by the platform will be cleared.