Karl Rees replied to the topic 'indi_celestron_aux' in the forum. 2 years ago

My naïve reading of the Connectivity section of the driver docs was that the "proper level converter" that was needed was simply something to bring 12v down to 5v, and that this was inherent to any standard USB/Serial adapter. But there's something else needed?

Perhaps the driver documentation needs some clarification and cleanup? The document I'm talking about is here: indilib.org/telescopes/celestron/celestron-aux-driver.html. One of the options it describes is "serial cable connected to Celestron AUX port." The warning about needing a "proper level converter" seems to only be with respect to the "old standard RS-232 [with] symmetric +/-12V signalling." On the other hand, the document indicates that since the "cheapest USB/serial converters . . . have serial lines with TTL levels (+5V,0V) . . . they [actually] work with AUX port."

As for the HC port, any suggestions on the best place to get a USB/Serial cable that will actually work with it?

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