Re: CAT port returns ` ` ` on QCXmini
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I have a TTL to RS232 converter that was designed to interface directly with Raspberry Pie I/O pins that I will try and let you know.? It should also work in reverse to convert RS232 to TTL.??
Thanks! Jerry AC5JM
On Wednesday, August 30, 2023 at 08:21:31 AM CDT, Rob Giuliano via groups.io <kb8rco@...> wrote:
On Tue, Aug 29, 2023 at 03:56 PM, David Markovitch wrote:
Besides having higher voltages, a USB to RS232 signal will be inverted compared with a RS232 TTL signal.
Not to mention that TRUE RS232 levels swing + and - at those higher voltages.? So your 6V RS232 logic is very likely switching between +6V and -6V. There is a good explanation here:??of? ------- Rob KB8RCO
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