05-11-2025, 01:11 PM
I hooked up my pn532 using a logic level converter and an external power supply. It turns out the PN532 is using address 0x24, so I get a conflict with the 868 internal relay controller. So I tried setting the PN532 to HSU, and connect it to the board's extended serial port, which utilizes pin 12 and 13 on the ESP32. Upon connecting, the board gave errors during boot, and I could not upload the software. When the PN532 was disconnected, the errors disappeared. I found out that pin 12 is actually a bootstrap pin that controls the flash voltage? Why have you designated a bootstrap pin as a regular io pin? From what I can tell, it would cause all kinds of weird unpredictable behavior if I tried to use that pin as a regular IO pin!
Is there another pin I can use for HSU?
Is there another pin I can use for HSU?