Always double-check vendor listings. Some sellers market “HW-597 drivers” as a paid download. Never pay for drivers. All drivers mentioned here are available free of charge from the original chip manufacturers.
: Supports both 3.3V and 5V logic levels, selectable via an onboard jumper (shunt). hw-597 driver
: Often features high-quality "yellow pins" that are noted for being more durable than standard black pins found on some budget clones. Always double-check vendor listings
: If the module appears as a COM port but does not return data, check for physical defects like broken resistors or poor solder joints. alternative modules hw-597 driver
GPIO.setmode(GPIO.BCM) GPIO.setup(RELAY1, GPIO.OUT) GPIO.setup(RELAY2, GPIO.OUT)