esp-idf/components/bt/ble_mesh/mesh_docs/BLE-Mesh_FAQs_EN.md

# Frequently Asked Questions

## General Questions

### Why I do not get a reply from the remote device when I perform get operation immediately after set operation has been performed?
* Any Client Model operation needs to wait for the completion event of an ongoing operation. Once the completion event is received the next command can be executed. If a command is executed before the completion event is received, a timeout error will occur.

### When I use the API  `esp_ble_mesh_client_model_send_msg`, why does it crash with the log messages *Invalid client value when sent client msg* or *Invalid client value when sent client msg*?
* You should initialize a structure of the type `esp_ble_mesh_client_t` and set its value as the user data of client model.
component/ble_mesh: ESP BLE Mesh release 1. BLE Mesh Core * Provisioning: Node Role * Advertising and GATT bearer * Authentication OOB * Provisioning: Provisioner Role * Advertising and GATT bearer * Authentication OOB * Networking * Relay * Segmentation and Reassembly * Key Refresh * IV Update * Proxy Support * Multiple Client Models Run Simultaneously * Support multiple client models send packets to different nodes simultaneously * No blocking between client model and server * NVS Storage * Store Provisioning Data of BLE Mesh Nodes in Flash 2. BLE Mesh Applications * BLE Mesh Node & Provisioner * Node Example * Provisioner Example * Node + Generic OnOff Client Example * Fast Provisioning * Vendor Fast Prov Server Model * Vendor Fast Prov Client Model * Examples * Wi-Fi & BLE Mesh Coexistence * Example * BLE Mesh Console Commands * Example 3. BLE Mesh Models * Foundation Models * Configuration Server Model * Configuration Client Model * Health Server Model * Health Client Model * Generic Client Models * Generic OnOff Client * Generic Level Client * Generic Location Client * Generic Default Transition Timer Client * Generic Power OnOff Client * Generic Power Level Client * Generic Battery Client * Generic Property Client * Generic Server Models * Generic OnOff Server (Example) * Lighting Client Models * Light Lightness Client * Light CTL Client * Light HSL Client * Light xyL Client * Light LC Client * Sensor Client Model * Sensor Client * Time and Scenes Client Models * Time Client * Scene Client * Scheduler Client 2019-01-07 02:16:47 -05:00			`# Frequently Asked Questions`

			`## General Questions`

			`### Why I do not get a reply from the remote device when I perform get operation immediately after set operation has been performed?`
			`* Any Client Model operation needs to wait for the completion event of an ongoing operation. Once the completion event is received the next command can be executed. If a command is executed before the completion event is received, a timeout error will occur.`

			### When I use the API `esp_ble_mesh_client_model_send_msg`, why does it crash with the log messages Invalid client value when sent client msg or Invalid client value when sent client msg?
			* You should initialize a structure of the type `esp_ble_mesh_client_t` and set its value as the user data of client model.