User Tools

Site Tools


praw

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
praw [2015/11/27 22:09]
127.0.0.1 external edit
praw [2016/12/06 14:17] (current)
andies Added notes below about noise suppression.
Line 42: Line 42:
 //​**NOTES:​**//​ //​**NOTES:​**//​
  
-//If you use non approved receiver modules and no Low Pass Filter (LPF), pilight picks up a lot of noise. See wiki for recommended [[receivers]] and forum for information about [[http://​forum.pilight.org/​Thread-Europe-Only-Band-pass-filter-parts|hardware filter]]//+//If you use non approved receiver modules and no Low Pass Filter (LPF), pilight picks up a lot of noise. See wiki for recommended [[receivers]] and forum for information about [[http://​forum.pilight.org/​Thread-Europe-Only-Band-pass-filter-parts|hardware filter]] ​But notice: 433 MHz transmission is based on OOK (ON-OFF-Keying) of a 433 MHz RF-carrier, the result is a square signal with sharp rising/​falling edges. One can only suppress rising/​falling edges based on the knowledge that the minimum distance between rising/​falling edges is approximately 100µS and simply ignore transitions with shorter durations.//
praw.txt · Last modified: 2016/12/06 14:17 by andies