ESP32 example BT_DISCOVERY has error ESP_ERR_INVALID_ARG

[rexzz]

1. trying to run copy of esp-idf\examples\bluetooth\bt_discovery.

NOW WORKING AFTER I manually edited SDK. BUT this is a note if others trying this out or if someone wants to update "README" for bt_discovery.(Maybe mention editing SDK). AND IF SOMEONE wants to look at my SDK changes and tell me if something is wrong, I'd appreciate.

1. trying to run copy of esp-idf\examples\bluetooth\bt_discovery. Using idf.py. menuconfig and build seem to run.

2. I get error "app_main enable controller failed: ESP_ERR_INVALID_ARG"

3. BT choices in menuconfig in two pictures

4. "Menuconfig" presents slighty different choices than those in the bt_discovery\README.rst.
   (nowhere can I see where to not choose "release DRAM from classic BT Controller" as README suggests)

5. so I look at esp-dif\examples\bluetooth\bt_discover\sdkconfig.defaults
   and found which was different than what menuconfig had generated.
   CONFIG_BT_ENABLED=y
   CONFIG_BTDM_CONTROLLER_MODE_BLE_ONLY= ns
   CONFIG_BTDM_CONTROLLER_MODE_BR_EDR_ONLY=y
   CONFIG_BTDM_CONTROLLER_MODE_BTDM=
   CONFIG_CLASSIC_BT_ENABLED=y
   CONFIG_A2DP_ENABLE=n
   CONFIG_GATTS_ENABLE=n
   CONFIG_GATTC_ENABLE=n
   CONFIG_BLE_SMP_ENABLE=n

6. So I changed SDK for my copy. Most of the relvant bits are below.

CONFIG_BT_ENABLED=y

CONFIG_BTDM_CONTROLLER_MODE_BLE_ONLY is not set

CONFIG_BTDM_CONTROLLER_MODE_BR_EDR_ONLY=y

CONFIG_BTDM_CONTROLLER_MODE_BTDM is not set

CONFIG_BTDM_CONTROLLER_BR_EDR_MAX_ACL_CONN=2
CONFIG_BTDM_CONTROLLER_BR_EDR_MAX_SYNC_CONN=0
CONFIG_BTDM_CONTROLLER_BLE_MAX_CONN_EFF=0
CONFIG_BTDM_CONTROLLER_BR_EDR_MAX_ACL_CONN_EFF=2
CONFIG_BTDM_CONTROLLER_BR_EDR_MAX_SYNC_CONN_EFF=0
CONFIG_BTDM_CONTROLLER_PINNED_TO_CORE_0=y

CONFIG_BTDM_CONTROLLER_PINNED_TO_CORE_1 is not set

CONFIG_BTDM_CONTROLLER_PINNED_TO_CORE=0
CONFIG_BTDM_CONTROLLER_HCI_MODE_VHCI=y

CONFIG_BTDM_CONTROLLER_HCI_MODE_UART_H4 is not set

CONFIG_BTDM_CONTROLLER_MODEM_SLEEP=y
CONFIG_BTDM_MODEM_SLEEP_MODE_ORIG=y

CONFIG_BTDM_MODEM_SLEEP_MODE_EVED is not set

CONFIG_BTDM_LPCLK_SEL_MAIN_XTAL=y
CONFIG_BLUEDROID_ENABLED=y
CONFIG_BLUEDROID_PINNED_TO_CORE_0=y

CONFIG_BLUEDROID_PINNED_TO_CORE_1 is not set

CONFIG_BLUEDROID_PINNED_TO_CORE=0
CONFIG_BTC_TASK_STACK_SIZE=8000

CONFIG_BLUEDROID_MEM_DEBUG is not set

CONFIG_CLASSIC_BT_ENABLED=y

CONFIG_A2DP_ENABLE is not set

CONFIG_BT_SPP_ENABLED=y

[chegewara]

@rexzz You want to use classic BT, but this library is to work with BLE. So what is your problem?

[chegewara]

I think that in esp-idf version you are using some menuconfig values changed its names. Most likely this one:
https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/BLEDevice.cpp#L350
CLASSIC_BT_ENABLED is now CONFIG_CLASSIC_BT_ENABLED

[rexzz]

thanks chegewara. You are right. I realize the library is 95% BLE. Still that fragment for was for classic BT and I got it to work (after tweaking a few things).

@rexzz it will be helpful if you show us what things you tweak to make it work!.

[rexzz]

hi @hassance3. sorry not to respond earlier. give me a couple weeks to find what I did last year. it's definitely NOT pretty.

[rexzz]

hey @hassance3 - I'm still not sure what I was up to last year. (I found something but I couldn't get it to work). Meanwhile take a look at https://github.com/AntorFr/ClassicBTScan . I was following him last year. I notice he updated recently. I haven't tried as I've gone in 'a different direction'

@rexzz Thank you, it's work, my building script copy the wrong sdkconfig, so after cloning new IDF, using command line to build it's work, for Classic and BLE.

Thank you.