I have a CY8CMOD-062-4343W evaluation board that I'm trying to get up and running in Modus Toolbox for a BLE project. I started with the BLE_CapSense_Buttons_and_Slider example project. I got that up and running and it worked great with the CySmart app and the terminal output matched what was expected in the README.
Then I started adding in my own BLE Characteristics using the Bluetooth Configurator (v 2.30). After making some changes, the BLE now fails to start, and I get the following messages on my terminal:
Bluetooth Stack Initialization Successful!
 hci_open(): init error (0x4021c00)
 hci_write(): UART is NOT initialized
 handle_hci_tx_command(): hci write failed (0xb7)
I am not sure what would be causing the HCI initialization to fail, and I can't find anything on what these error messages mean. It is weird to me that I get the Initialization Successful message, since I would have thought that initializing HCI would be part of the BLE stack setup.
It is also worth noting that the ble_app_management_cb() method is never called like it is in the example app, so I don't get the messages about my device name and address.
I can however touch the capsense slider and I see that the ble_task handles this by calling the ble_send_notification() method which seems to finish without errors despite the HCI not being initialized.
Any help on tracking down this error would be greatly appreciated.
Hi @cvanbeek , Please zip and share your project so that we can take a look at the issue in your project.
Which version of the BTSTACK and bluetooth-freertos are you using in your application? Which version of modustoolbox are you using? Is it 2.3.1 or 2.3?
Sorry I missed your initial reply. Here are the versions I'm using:
I believe at one point I tried updating the bluetooth-freertos and btstack libraries to the newest version, and doing so completely ruined to project. The library manager for Modus Toolbox doesn't do a great job of pulling in or removing libraries.
My project was initially created and modified from the AnyCloud_BLE_CapSense_Buttons_and_Slider example project. I can run that project without getting this error.
Hi @cvanbeek , We highly recommend you to use the latest version of the Btstack and the bluetooth freertos. However note that BTSTACK 3.x and above requires you to install MTB 2.3.1 patch
Please update the tools and library to the latest versions and let us know if the issue is still reproducible.