| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-H4 | ESP32-S3 | | ----------------- | ----- | -------- | -------- | -------- | -------- | # ESP-IDF Gatt Security Server Example This example shows how to use the APIs to connect to and encrypt with peer devices. To test this example, you can run [gatt_security_client_demo](../gatt_security_client), which starts scanning, connects to and starts encryption with `gatt_security_server_demo` automatically. Please, check this [tutorial](tutorial/Gatt_Security_Server_Example_Walkthrough.md) for more information about this example. ## How to Use Example Before project configuration and build, be sure to set the correct chip target using: ```bash idf.py set-target <chip_name> ``` There are some important points for this demo: 1.`esp_ble_gap_set_security_param` should be used to set the security parameters in the initial stage; 2.`esp_ble_set_encryption` should be used to start encryption with peer device. If the peer device initiates the encryption, `esp_ble_gap_security_rsp` should be used to send security response to the peer device when `ESP_GAP_BLE_SEC_REQ_EVT` is received. 3.The `gatt_security_client_demo` will receive a `ESP_GAP_BLE_AUTH_CMPL_EVT` once the encryption procedure has completed. ### Hardware Required * A development board with ESP32/ESP32-C3/ESP32-C2/ESP32-H4/ESP32-S3 Soc (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.) * A USB cable for Power supply and programming See [Development Boards](https://www.espressif.com/en/products/devkits) for more information about it. ### Build and Flash Run `idf.py -p PORT flash monitor` to build, flash and monitor the project. (To exit the serial monitor, type ``Ctrl-]``.) See the [Getting Started Guide](https://idf.espressif.com/) for full steps to configure and use ESP-IDF to build projects. ## Example Output ``` I (0) cpu_start: Starting scheduler on APP CPU. I (545) BTDM_INIT: BT controller compile version [d03a5d3] I (545) system_api: Base MAC address is not set I (545) system_api: read default base MAC address from EFUSE I (555) phy_init: phy_version 4670,719f9f6,Feb 18 2021,17:07:07 I (905) SEC_GATTS_DEMO: app_main init bluetooth I (1015) SEC_GATTS_DEMO: ESP_GAP_BLE_LOCAL_IR_EVT I (1015) SEC_GATTS_DEMO: ESP_GAP_BLE_LOCAL_ER_EVT I (1035) SEC_GATTS_DEMO: The number handle = 8 I (1065) SEC_GATTS_DEMO: advertising start success ``` ## Troubleshooting For any technical queries, please open an [issue](https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.