I want to connect HC-05 Bluetooth Module to STM32WB30 MCU. Are specific pins required or any GPIO will work to connect the module? Also is there any reference design for the STM32WB30 MCU?

HAgar.1 · ‎2021-07-22

Uwe Bonnes · ‎2021-07-22

For Bitbanging drivers, any GPIO Pin will work If the module has 5 Volt IO, you need to use 5-Volt tolerant STM GPIO pins are level shifter.. If you want to connect with hardware SPI/I2C /etc, you need a GPIO where the appropriate function is mapped. Look at the datasheet chapter 4 "Pinouts and pin description"

HAgar.1 · ‎2021-07-22

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HAgar.1 · ‎2021-07-22

Okay so if I want to connect with hardware, does it mean I have to use the pins with USART?

Tesla DeLorean · ‎2021-07-22

Typically these devices use UART connectivity (optionally using flow control), I'd think the HC-05 datasheet would cover the basic requirements and expectations.

http://www.electronicaestudio.com/docs/istd016A.pdf

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HAgar.1 · ‎2021-07-22

Okay Okay, I can only see USART in the STM32WB30 pin description. I can use them right? I do not know much about USART or UART so I am really confused.