Modbus_RTU_lib - scalable, platform independent Modbus RTU library. What's done: Slave mode: - read/write holding registers - read input registers Master mode: - none TODO: Slave mode: - read/set coils (?) Master mode: - all AVR_test - simple library test with AVR ATmega8. ex_use.c is a Q&D Modbus RTU slave, with 16 holding, 16 input registers and baudrate set to 600. Notes: CRC checking disabled for testing purposes.