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microcontroller to microcontroller - is this I2C protocol?

It looks like SPI, a common protocol for this type of communication. https://en.m.wikipedia.org/wiki/Serial_Peripheral_Interface
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What is this RS-485 communication protocol/

By0 - 32 start frame By1 - 00 source address By2 - 1A, 17 11 - destination address By3 - 80,10 -> command By4 ... ByN-2 data ByN-1 ... CRC XOR of By1 to ByN-2 ByN - 34 End of ...
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