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[questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 16/06/2022 15:54, Thibaut HUMBERT wrote:
I have a serial port, but I don't know how to convert the PPS output (0 / 3.3V) to RS232 (-5V / +5V).

RS232 is +/-12V, although, input values of +/-3V are unequivocal. In practice line receivers have both positive and negative going thresholds > 0V, and various things rely on this to put lines into the right state when the plug is removed (false for control lines and marking(?) for data).
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