I recently acquired an electric typewriter. It is the "Triumph Adler Gabriele Cyclo". The unit does not have any outside electric interfaces, only the keyboard. After examining the pcb, I found a 4 pin header with RX TX GND 24V. When powering the unit on, it is sending 3 bytes with 4800baud.
My goal is to interface the electric typewriter with a micro controller.
But there is no documentation available. The only thing when searching online is this website: https://www.stcarchiv.de/stc1988/07/gabriele-9009-1
It helped me a lot, but my machine differs from the website.
By trial and error, I figured out that:
0xA0 - offline mode
0xA9 - online mode
Is there any similar documentation available?
it is sending 3 bytes... what are they? ... what happens on if you type? – jsotola Jan 23 '24 at 21:07