Thanks... I'll give that a try.

Update: I tried reducing the max tx power and it connects. Very interesting... and a bit counterintuitive (at least for me)!

I use generic ESP32-S3-DevKitC boards as a sub-assembly in a product. These boards have an ESP32-S3-WROOM-1 module on them. I source them from a number of suppliers. On some of these boards the WIFI doesn't work properly. It successfully scans for Access Points, but won't connect to an Access Point....

Thanks for your suggestion. I did try it. It makes the warning go away, but the connection problem still exists, starting at commit 603d293. See this issue for more info:

https://github.com/espressif/esp-idf/issues/5134

For more information, see https://github.com/espressif/esp-idf/issues/5134

Finally getting a chance to look at this again and figured I would start with the first warning message I get in the log output: W (2285) BT_BTC: btc_avrc_tg_set_rn_supported_evt failed: AVRC TG not yet initialized I think this occurs because main.c in the A2DP source example calls bt_av_hdl_stack_e...

I've been working with the Bluetooth a2dp_source example in the stable esp-idf-v4.0 branch. It works okay with an OontZ Angle Bluetooth Speaker, but it doesn't work at all with an Amazon Echo Dot Bluetooth Speaker. The failure scenarios vary depending on the order of initialization of the ESP32 and ...