Pre-amble question....

Author	Message
Grogster Admin Group Joined: 31/12/2012 Location: New Zealand Posts: 9992	Posted: 04:25am 18 Jun 2021       Hi Jim Yes, they are 'Dumb modules' - no smarts at all in either the TX or the RX. The TX has an enable pin to minimize standby current, but the RX outputs continuous white-noise when there is no valid data. This is one application where the 8-pin PICAXE is a winner - as a data filter. The PICAXE outputs the wanted message, and ignores all the white-noise. So, it would seem that having a longer preamble is not necessarily a good thing then? I'm surprised by that, but it is what it is. I figured more preamble would give the RX longer to sync the data-slicer, but too much preamble obviously can be a bad thing then.