[Feature request] Support for ESP32-C6

[troglodisme]

I can't compile any of the examples on a ESP32-C6 board (specifically Sparkfun ESP32-C6 Thing Plus). I believe this is due to an issue with NimBLE library you are using. Can you please suggest a solution?

In file included from /Users/giulio/Library/Arduino15/packages/esp32/tools/esp32-arduino-libs/idf-release_v5.1-b6b4727c58/esp32c6/include/bt/include/esp32c6/include/esp_bt.h:17, from /Users/giulio/GitHub/resources/Arduino/libraries/NimBLE-Arduino/src/NimBLEDevice.h:46, from /Users/giulio/GitHub/resources/Arduino/libraries/Sensirion_Gadget_BLE_Arduino_Lib/src/NimBLELibraryWrapper.cpp:2: /Users/giulio/Library/Arduino15/packages/esp32/tools/esp32-arduino-libs/idf-release_v5.1-b6b4727c58/esp32c6/include/bt/common/api/include/api/../../../../controller/esp32c6/esp_bt_cfg.h:19:10: fatal error: syscfg/syscfg.h: No such file or directory 19 | #include "syscfg/syscfg.h" | ^~~~~~~~~~~~~~~~~ compilation terminated.

[LeonieFierz]

Hi @troglodisme

Your assumption is right, the NimBLE lib unfortunately does not support the ESP32-C6 yet. However, there is a feature request for it and there is already a branch with a test implementation which seems to work. See h2zero/NimBLE-Arduino#642

If this does not work out, you could plug in another BLE lib by implementing the src/IBLELibraryWrapper.h.

Best, Léonie

[davidkreidler]

I've tried my luck without success on two different esp32-c6 boards using the "esp32-c6-test" branch.
https://github.com/h2zero/NimBLE-Arduino/tree/esp32-c6-test
The gadget simply did not show up in the Sensirion MyAmbience app.

The NimBLE-Arduino example code here worked https://github.com/h2zero/NimBLE-Arduino/tree/esp32-c6-test/examples/NimBLE_Client . I was able to see Bluetooth devices around reported by the esp32-c6 itself via serial.

The same branch but on an esp32-S3 was successful. I will look next into the messages further down in the issue h2zero/NimBLE-Arduino#642.

[troglodisme]

Thanks @davidkreidler and @LeonieFierz

Interesting that you could get the esp32-c6-test branch to work for the NimBLE_Client example. If my case it doesn't successfully finish compilation process. Could you please share your setup?

[davidkreidler]

Arduino IDE 2.3.2
esp32 by Espressif Systems 3.0.3
NimBLE-Arduino branch esp32-c6-test
Sensirion core 0.7.1
Sensirion Gadget BLE Arduino Lib 1.3.2
Sensirion I2C SCD4X 0.4.0
Sensirion UTP CORE 0.4.0

[troglodisme]

hi @LeonieFierz any updates on this? I noticed you assigned the issue to yourself. Thank you. I have not managed to move forward with it.

[LeonieFierz]

Hi @troglodisme
As we do not have a esp32-c6 available for testing I cannot test it myself. Did you try running the NimBLE_Server example?

[troglodisme]

Hi @troglodisme As we do not have a esp32-c6 available for testing I cannot test it myself. Did you try running the NimBLE_Server example?

Thanks @LeonieFierz . We are happy to provide you with an esp32-c6 to test with? let me know how. Alternatively, you could just try and build the code for that board - I think you'll experience the same as me and the code will not compile unfortunately.

[LeonieFierz]

@troglodisme
We will have a look into compiling and running the Arduino BLE Gadget on a ESP32-C6 Board within the next weeks and get back to you.

[LeonieFierz]

Hi @troglodisme

I tried to compile and run the Arduino BLE Gadget on a DOIT ESP32-C6 DEVKIT-C V1 board. After investigating further, I found that from the NimBLE-Arduino examples I get the Client Example working (esp32 by Espressif Systems 3.0.3,
NimBLE-Arduino branch esp32-c6-test) and it detects the devices around. However, the Server Example (and the Arduino BLE Gadget Example) do compile, but the Advertisements are not visible. This is also what the maintainer of the NimBLE-Arduino lib states in the issue h2zero/NimBLE-Arduino#645. As from this issue it is also quite clear that NimBLE-Arduino will not support the ESP32-C6 MCU. Thus, we are unfortunately not able to provide support for ESP32-C6 right now.

The way to get the Arduino BLE Gadget working on an ESP32-C6 would be to implement a IBLELibraryWrapper using the BLE Stack shipped with the ESP32 Board Support directly and use that implementation instead of the NimBLELibraryWrapper. As a starting point, the Server example worked out of the box https://github.com/espressif/arduino-esp32/tree/master/libraries/BLE/examples.

Best, Léonie