Jerry,
I agree.?
The various STM "pill boards" sound promising and are --very-- cheap.....did you know there are 17 different STM32F103 products out there and the STM32F103C8 is one of the "simpler" chips. The chips themselves go from 36 pins to 100 pins. I see they all have a RTC.
73 Kees K5BCQ
