Mission planner terminal displaying random garbage codes

i am using apm2. 6, i have loaded custom firmware ac3.2.1, as soon as i hit connect in mission planner in terminal it get connected and start display continuously random garbage symbols and all. this happen all time no matter i connect it vai usb or radio telematery mav link with proper braudrate. hiw to fix this issue

Random garbage is Mavlink data. Did you enable terminal mode?


can you please tell me how to enable it, my work is in hold because of this issue.

The terminal (CLI) was removed in 3.2 and >, there is no fixing it.