esp_zb_start() function

- ESP_OK on success

Autostart mode: It initializes, load some parameters from NVRAM and proceed with startup. Startup means either Formation (for ZC), rejoin or discovery/association join. After startup complete, esp_zb_app_signal_handler is called, so application will know when to do some useful things. No-autostart mode: It initializes scheduler and buffers pool, but not MAC and upper layers. Notifies the application that Zigbee framework (scheduler, buffer pool, etc.) has started, but no join/rejoin/formation/BDB initialization has been done yet. Typically esp_zb_start with no_autostart mode is used when application wants to do something before starting joining the network. Precondition: stack must be initialized by esp_zb_init call. esp_zb_init sets default IB parameters, so caller has a chance to change some of them. Note that NVRAM and product config will be loaded after esp_zb_start() call. Zigbee stack is not looped in this routine. Instead, it schedules callback and returns. Caller must run esp_zb_stack_main_loop() after this routine. Application should later call Zigbee commissioning initiation - for instance, esp_zb_bdb_start_top_level_commissioning(). @anchor esp_zb_start