WiFi or WiFi+BT modules architecture and parts recommendations

[Ricko]

Hi,

We are looking for a WiFi module or preferably a WiFi + BT module to be used in a battery-operated device where audio files are recorded onto a uSD card and whenever required they are downloaded through WiFi or BT link to a PC. For context, the audio files are 20MB in size.

These are the main specs:

- pre-certified module: WiFi or WiFi+BT

- highly reliable for mass production

- uSD card interface (specific for audio and files)

- means to record and play back the audio files

- low-power 

- compact & SMD

- straightforward to integrate from a firmware perspective (library available) and well supported in terms of documentation and ecosystem.

Could you please make recommendations:

- for such suitable modules?

- for alternative system architecture using ST products and ecosystem to implements such device?

Thank you

Ricko

[Andrew Neil · Accepted solution]

ST's only module with both WiFi and BLE is the ST67W series:

https://www.st.com/en/wireless-connectivity/wi-fi-products.html

This is a coprocessor module - it needs a separate Host microcontroller.

ST's MCUs with built-in BLE are the STM32WBx series:

https://www.st.com/en/microcontrollers-microprocessors/stm32-wireless-mcus/products.html

There are no MCUs with WiFi.

[Ricko]

Thank you @Andrew Neil 

what would you recommend as the lowest cost micro that can record to uSD and playback audio files?

Thank you

[Andrew Neil]

An SD card (micro or otherwise) can be accessed via SPI - so any microcontroller with SPI ...

https://www.st.com/en/development-tools/st-mcu-finder-pc.html

https://www.st.com/en/development-tools/stm32-finder.html

https://www.st.com/content/st_com/en/stm32-mcu-developer-zone/mcu-portfolio.html

Distributors often have good parametric search tools ...

[Andrew Neil]

Follow-on question focussing on audio capabilities split to new thread: 

Microcontroller with some kind of audio I/O capability ?

@Ricko If Audio is key, note that ST Microcontrollers only have BLE - not "Classic" BT.

Most "Bluetooth" audio is "Classic".

If the WiFi/BLE part of your question is now resolved, please mark the solution.

[Ricko]

Thank you @Andrew Neil