Hi! I work with LPC2138 ARM and i want to establish the communication between the microcontroller and the Modbus.As slave the microcontroller receives a frame from the master(modbus).The problem is that i don't know how the slave can respond to the request from the master.By the way i program with C language.I try with" printf ",but untill now i don't have any success.
Thank you for any Help.
Best regards