#345 ESP32 vs STM32: Which one is better (Bluepill)?

Many commenters tell me that the STM32 MCUs are great. The last time they were used on this channel was in video #11 on Jul 27, 2015. High time for a closer look.
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Links:
Bluepill: https://s.click.aliexpress.com/e/_dWHh6MN or or https://bit.ly/2WugLYj or https://amzn.to/30cVrHC
Maple Mini: https://s.click.aliexpress.com/e/_dXgvuDd
ESP32 Mini: https://s.click.aliexpress.com/e/_dYE1yg3 or https://amzn.to/3jePfrh
STLink V2: https://s.click.aliexpress.com/e/_d67rgrT or https://amzn.to/2ZCe6xN
Blackpill: https://s.click.aliexpress.com/e/_dZm4qfj or https://bit.ly/3ji15kt
Preferences link for STM32 installation: http://dan.drown.org/stm32duino/package_STM32duino_index.json
STM flasher: https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html
Bootloaders: https://github.com/rogerclarkmelbourne/STM32duino-bootloader/tree/master/bootloader_only_binaries
install_drivers.bat: https://github.com/rogerclarkmelbourne/Arduino_STM32/tree/master/drivers/win
STM32 discord channel: https://discord.com/invite/wrMcmXA
New STM32 version: https://youtu.be/Myon8H111PQ
Lot's of good stuff: https://theta.eu.org/2018/12/20/stm32.html
STM32 forum: https://www.stm32duino.com/viewforum.php?f=39
STM32 Discord channel: https://discord.gg/95Cx6DatKs
List of STM32 libraries: https://www.arduinolibraries.info/architectures/stm32
Libraries wiki: https://github.com/stm32duino/wiki/wiki/Libraries
STM32 boards: https://stm32-base.org/boards/

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