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Arduino UNO R4 Minima pinout guide: RA4M1 GPIO, PWM, 14-bit ADC, 12-bit DAC, CAN, RTC, USB-C, SPI, I2C, UART, power pins and safe wiring.
STM32 CAN Bus Guide: TJA1050, SN65HVD230 and Vehicle Networks
STM32 CAN bus guide for TJA1050 and SN65HVD230: Blue Pill bxCAN, wiring, 120-ohm termination, bit timing, OBD-II, vehicle networks and troubleshooting.
STM32 Blue Pill vs Black Pill: F411 Faster, F103 Has CAN
STM32 Blue Pill vs Black Pill compared: F411 Black Pill wins on CPU, RAM, flash and USB; F103 Blue Pill still wins when native CAN or legacy compatibility matters.