I begin with RFlink.
Getaway prototype on a bread with Rf module Velleman RX433N, a PullDown on the data link and a 35cm 2.5mm² copper wire as antenna
5Vcc seems clean (less than 50mv of noise)
I have 2 switch with "NewKaku" identification. The 2 switch work well (less than 10% off transmit loss).
But I have a Renkforce FT007TH with "F007_TH" identification with lot of transmit loss. The Renkforce FT007TH send data evry 60s, but the RFlink getway send decoded data only few time per hour, some time 40minute between 2 decoded transmit.
Both, switch and FT007TH are place close to the getaway.
The Velleman RX433N have a "linear out", I am not sure but it look like a RSSI out. View with a scope, amplitude of transmit from my switch an from the FT007TH are similar and with very good SNR.
At each FT007TH transmit the debug mode trace data like this :
Code: Select all
I am not fluent with RF applications, I suppose some explanation :
- trouble with my receiver, I don't now if it is a good one. But the 2 switch are well detected
- trouble with the FT007TH probe, unstable transmit timing for example
- software bug
Any one have an idea ?