TTL serial communications

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i have motorized telescope mount want interface arduino mega 2560.  

at first thought had rs232 port, bought appropriate shield.  turns out has ttl communication.  for second, thought of building rs232 ttl converter. realized hook 1 of arduino transmit pins scope mount's receive pins, hook arduino's receive pin scope mount's send pins, , tie grounds together.  is there flaw logic?

how can sure voltage levels compatible?  what baud rate?

thanks in advance!

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how can sure voltage levels compatible?

with multimeter.

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what baud rate?

rtfm?


Arduino Forum > Using Arduino > Networking, Protocols, and Devices (Moderator: fabioc84) > TTL serial communications


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