To configure the number of Bluetooth connections on the ESP32, you can use the menuconfig tool inside the ESP-IDF.
To do this, open the menuconfig tool and go to the Component config > Bluetooth > Bluetooth controller > BLE MAX Connections menu. Here a maximum number of Bluetooth connections can be set that the ESP32 can support.
Here are some things to keep in mind when configuring the number of Bluetooth connections on the ESP32:
- The maximum number of Bluetooth connections that the ESP32 can support depends on the type of Bluetooth connection. For Bluetooth Classic, the maximum number of connections is 7. On the other hand, a total of 9 connections are supported by Bluetooth Low Energy (BLE).
- The number of Bluetooth connections that the ESP32 can support also depends on the amount of memory that is available on the ESP32. For each Bluetooth connection, the ESP32 needs to allocate some memory. If the ESP32 does not have enough memory, it will not be able to support as many Bluetooth connections.
- The number of Bluetooth connections that the ESP32 can support also depends on the application type running on the ESP32. Some applications require more memory than others. If the application requires a lot of memory, it may not be able to support as many Bluetooth connections.
If you are unsure how many Bluetooth connections to configure on the ESP32, start with a small number and then increase it as needed. You can also test the ESP32 with different numbers of Bluetooth connections to see how it performs.
Conclusion
The ESP32 microcontroller offers robust Bluetooth capabilities, allowing it to establish multiple Bluetooth connections simultaneously. The ESP32 can support up to 9 simultaneous Bluetooth connections. However, the recommended ESP32 Bluetooth connections are 3 for stable connectivity. We can also set the number of connections using the menuconfig inside the ESP-IDF.
