I have an apple II, arduino mega, and a modern PC all wired up the RS232 out of the apple hits a MAX232 and goes into the serial 1 of the MEGA, the MEGA then simply spits out what it reads on serial one back to the PC the problem is its printing out wrong values, I hit H on the apple and it spits …

Confused with serial

Osgeld September 22, 2012, 7:47am 14

I have a 1987 DSO so I will try my best in the morning

Topic		Replies	Views
MAX232 RS-232 communication to hyperterminal Syntax & Programs	11	5813	May 6, 2021
RS232 (PC) Arduino Mega (Serial1) [RESOLU] Français	8	3866	May 6, 2021
Arduino with MAX232 not transferring data properly Troubleshooting	25	22738	May 6, 2021
HELP! - RS232 Serial Stuff Interfacing	19	8529	May 6, 2021
Serial comms problems talking to external device - strange values Networking, Protocols, and Devices	10	2910	May 6, 2021