Introduction - If you have any usage issues, please Google them yourself
U1 is the master SCM SCM PIC16887A sent slave receiver, U2 is driven receiving, production control to send the two-plane communication: the beginning, as the master side by the U1, U2 sends to the slave side characters " hello!" , Send receiving end and converted to synchronize slave state, such as the received character is " How are you?" the LED flashes, communication ended. U2 is set to synchronize the start of the slave state of receiving and confirm the receipt of 7 characters received The characters " hello!" and then sent into the master mode to send characters back to " How are you?" , enter the LED flashing status, communication end