05-12-2025, 08:29 AM
I changed the relay controller (PCF8574) address to 0x20, so now there should be no conflict.
However when I connect the PN532 (using a level converter) and perform an I2C scan, I get these errors:
(107493) i2c.master: I2C transaction timeout detected
E (107494) i2c.master: probe device timeout. Please check if xfer_timeout_ms and pull-ups are correctly set up
The PN532 works fine when I connect it to an Arduino board. Do you know what might be the cause for these timeout errors?
However when I connect the PN532 (using a level converter) and perform an I2C scan, I get these errors:
(107493) i2c.master: I2C transaction timeout detected
E (107494) i2c.master: probe device timeout. Please check if xfer_timeout_ms and pull-ups are correctly set up
The PN532 works fine when I connect it to an Arduino board. Do you know what might be the cause for these timeout errors?