But on the Blue Pill it is used as a BOOT1 pin. BOOT0 and BOOT1 pins are used to make the microcontroller start in different ways. Most important is BOOT0 which has a pin all for itself, but BOOT1 has to share a pin with GPIO_PB2. I have never used either BOOT0 or BOOT1 so...
FIG. 1 is schematic side elevation of a filling machine; FIGS. 2A-2C are partial perspective view of an item feed and item sensor assembly of a filling machine, where FIG. 2A shows all components, FIG. 2B shows an infeed cover removed and FIG. 2C shows the infeed cover as transparen...