I am trying to install an STM32 patch for STM32F1 boards in the IDE (1.8.9). I have one for STM32F4 but have been unable to install any others. Several web pages told me to install
in preferences external board managers but I get a "error downloading" for that url. Same thing for:
and yet I can browse to both links and both files look ok so not sure why it can't or won't download from or Arduino.cc or install them.
Any suggestions as to how to get STM32F1 boards installed in IDE 1.8.9 for Windows using Windows 7?