The X735 v3.0 appears to passthrough all the GPIO Pins on the Raspberry Pi 4B. Obviously you should not use pins used by the X735. What pins does it use? Another post mentioned Pins 4, 17, 18, but that is not necessarily a comprehensive list (or what their functions are). I need to use the available pins to control relays and an input contact. Which ones are reserved for the X735
Also, it appears that power is provided via the pins in the header. Can I connect my DC power supply to the DC 5521 Jack and test the pins prior to attaching the Raspberry Pi? Which pins should I check? Thank you.
