here is a colored pinout sheet (PDF) for the Nucleo F103RB with all ports: USART, SPI, I2C, ADC (with channel), PWM (with timer), 5V tolerant pins, Arduino, Morpho and port names.
This is for my new definitions, which will be available soon.
STM32F103 Nucleo boards e.g. STM Nucleo F103RB
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