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The latest I2C specification says that there are 3 bytes for the Device ID: Manufacturer, part ID, & revision.
The MI2C_send_byte_transaction in Flowcode4 only allows a single byte for this.
Does Flowcode use this byte for something else or in a different way, or am I barking up the wrong tree?

Hello kkrause

"Transaction" is useful when you want to read or write an EEPROM with 2 byte address (>= 256).

If you want to read the manufacturer byte, you must use a reserved address (see chapter Device ID) and macros : TransmitByte and ReceiveByte.

Daniel

Thanks Daniel. I'm actually designing in a GLCD which has an I2C interface. I shall experiment this evening...