Multi-Connection Guide

[中文]

Introduction

The following table provides an overview of the maximum number of concurrent connections supported for each ESP Bluetooth LE Host. In multi-connection scenarios, connection parameters must be configured appropriately. In general, as the number of connections increases, the connection interval should be increased accordingly. For detailed parameter configuration recommendations and SDK configuration details, please refer to the corresponding example code in the following table.

In this document, the maximum number of connections refers to the maximum number of simultaneous active connections that the device can maintain, whether operating as a central or peripheral.

Host SDKconfig

Maximum Concurrent Connections by ESP Bluetooth LE Host

Host

Max Connections

SDKconfig

Example

ESP-Bluedroid

2

BT_MULTI_CONNECTION_ENBALE

BT_ACL_CONNECTIONS

multi_conn

ESP-NimBLE

2

BT_NIMBLE_MAX_CONNECTIONS

multi_conn

Controller SDKconfig

  • No controller-related SDK configuration is required.

Note

  1. The ability to support multiple connections highly depends on the application’s overall memory usage. It is recommended to disable unnecessary features to optimize multi-connection performance.

  2. When the device operates in the peripheral role, connection stability and overall performance will be influenced by the central device and the negotiated connection parameters.

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