If you cannot source the exact PI40952 3x2B driver (due to obsolescence or regional shortages), consider these drop-in or functional equivalents:
If it is a .zip file, extract it completely to a dedicated folder. pi40952 3x2b driver
Look for VEN_1C00&DEV_3050 or similar (signifying a WCH alternative chip). Step 2: Sourcing the Authorized Drivers If you cannot source the exact PI40952 3x2B
void loop() motorForward(); for (int i = 0; i <= 100; i++) setSpeed(i); delay(20); for (int i = 0