Say I have some I2C device with an Arduino. That Arduino sends some data to the device. Let's say it is a PCF8574. Arduino tells this chip to pull P3 HIGH. If I use another Uno and connect to the I2C lines and GND can I somehow get in any form and see that first Uno told the PCF to pull P3 HIGH? Th…

Arduino I2C sniffing data

Paul_B November 9, 2021, 9:39pm 7

Just checking.

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