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docs: Rebase and typos fixed for the bluetooth README files
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| Supported Targets | ESP32 | ESP32-C3 |
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| ----------------- | ----- | -------- |
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ESP-IDF Gatt Client Multi Connection Demo
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========================
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# ESP-IDF Gatt Client Multi Connection Example
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This is the demo of APIs to create a GATT multi-connection client. It can be used to connect to three GATT servers at the same time.
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This example shows the usage of APIs to create a GATT multi-connection client. It can be used to connect to three GATT servers at the same time.
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To test this demo, please run [gatt_server_demo](../gatt_server) to create three GATT server devices, namely ESP_GATTS_DEMO_a, ESP_GATTS_DEMO_b and ESP_GATTS_DEMO_c, `Gatt_client_multi_connection_demo` will connect to these three gatt server demos, and then exchange data.
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To test this example, please run [gatt_server_demo](../gatt_server) to create three GATT server devices, namely ESP_GATTS_DEMO_a, ESP_GATTS_DEMO_b and ESP_GATTS_DEMO_c, `Gatt_client_multi_connection_demo` will connect to these three gatt server demos, and then exchange data.
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Please, check this [tutorial](tutorial/Gatt_Client_Multi_Connection_Example_Walkthrough.md) for more information about this example.
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## How to Use Example
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Before project configuration and build, be sure to set the correct chip target using:
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```bash
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idf.py set-target <chip_name>
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```
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The code can be modified to connect to more devices (up to 4 devices by default). If you need to connect to more devices (more than 4 devices), you need to change `BT/BLE MAX ACL CONNECTIONS` in menuconfig.
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Please check the [tutorial](tutorial/Gatt_Client_Multi_Connection_Example_Walkthrough.md) for more information about this example.
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### Hardware Required
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* A development board with ESP32/ESP32-C3 SoC (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
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* A USB cable for Power supply and programming
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See [Development Boards](https://www.espressif.com/en/products/devkits) for more information about it.
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### Build and Flash
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Run `idf.py -p PORT flash monitor` to build, flash and monitor the project.
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the [Getting Started Guide](https://idf.espressif.com/) for full steps to configure and use ESP-IDF to build projects.
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## Example Output
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```
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I (0) cpu_start: Starting scheduler on APP CPU.
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I (512) BTDM_INIT: BT controller compile version [1342a48]
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I (522) system_api: Base MAC address is not set
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I (522) system_api: read default base MAC address from EFUSE
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I (522) phy_init: phy_version 4670,719f9f6,Feb 18 2021,17:07:07
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I (932) GATTC_MULTIPLE_DEMO: REG_EVT
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I (932) GATTC_MULTIPLE_DEMO: REG_EVT
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I (932) GATTC_MULTIPLE_DEMO: REG_EVT
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I (942) GATTC_MULTIPLE_DEMO: Scan start success
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I (1072) GATTC_MULTIPLE_DEMO: 38 68 a4 69 bb 7c
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I (1072) GATTC_MULTIPLE_DEMO: Searched Adv Data Len 28, Scan Response Len 0
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I (1072) GATTC_MULTIPLE_DEMO: Searched Device Name Len 0
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I (1082) GATTC_MULTIPLE_DEMO:
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I (1102) GATTC_MULTIPLE_DEMO: 08 ef 3b a7 04 41
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I (1102) GATTC_MULTIPLE_DEMO: Searched Adv Data Len 9, Scan Response Len 15
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I (1102) GATTC_MULTIPLE_DEMO: Searched Device Name Len 13
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I (1112) GATTC_MULTIPLE_DEMO: LG CM2760(41)
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I (1112) GATTC_MULTIPLE_DEMO:
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I (1222) GATTC_MULTIPLE_DEMO: 38 68 a4 69 bb 7c
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I (1222) GATTC_MULTIPLE_DEMO: Searched Adv Data Len 28, Scan Response Len 0
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I (1222) GATTC_MULTIPLE_DEMO: Searched Device Name Len 0
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I (1232) GATTC_MULTIPLE_DEMO:
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I (1372) GATTC_MULTIPLE_DEMO: 38 68 a4 69 bb 7c
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I (1372) GATTC_MULTIPLE_DEMO: Searched Adv Data Len 28, Scan Response Len 0
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I (1372) GATTC_MULTIPLE_DEMO: Searched Device Name Len 0
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I (1382) GATTC_MULTIPLE_DEMO:
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I (1412) GATTC_MULTIPLE_DEMO: 08 ef 3b a7 04 41
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I (1412) GATTC_MULTIPLE_DEMO: Searched Adv Data Len 9, Scan Response Len 15
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I (1422) GATTC_MULTIPLE_DEMO: Searched Device Name Len 13
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I (1422) GATTC_MULTIPLE_DEMO: LG CM2760(41)
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I (1432) GATTC_MULTIPLE_DEMO:
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I (1522) GATTC_MULTIPLE_DEMO: 38 68 a4 69 bb 7c
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I (1522) GATTC_MULTIPLE_DEMO: Searched Adv Data Len 28, Scan Response Len 0
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I (1522) GATTC_MULTIPLE_DEMO: Searched Device Name Len 0
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I (1532) GATTC_MULTIPLE_DEMO:
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```
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## Troubleshooting
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For any technical queries, please open an [issue](https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.
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