Is it possible to connect to a ESP32-C3 with multiple BLE clients?

[ChocolateLoverRaj]

I am using the BLE example where the ESP32-C3 is a peripheral. Whenever I connect to it with one device, other devices cannot connect to it anymore. Can I connect more by changing the code? What is the physical limit on the number of clients connected at a time?

[bjoernQ]

Technically the drivers allow multiple connections

The examples use a simple pure Rust BLE stack which doesn't support that. The stack is not part of esp-wifi - all that esp-wifi provides in terms of Bluetooth is a way to send and receive HCI packets.

You could use another stack but currently there are not many options for a pure Rust, no-std BLE stack. I hope we will see more advanced BLE stacks created by the community.

It should also be possible to port e.g. the Nimble BLE stack to work with esp-wifi but that is not something we plan to do

[ChocolateLoverRaj]

currently there are not many options for a pure Rust, no-std BLE stack

What about for std? I'm new to embedded Rust so I'll choose either std or no_std based on which one has the features I need.

[bjoernQ]

With Rust-std on ESP32 you will get all of esp-idf which includes the Nimble Bluetooth stack - so yes it should support it.
I personally have no experience with std on ESP32 however