RF range problem

[Ron Marcus]

Have you formatted your data for RF transmission? The Linx modules need to be conditioned to the incoming data. If you haven't done this, please search the archives for the proper conditioning of data to be transmitted.
Ron
P.S. I thought you were at 150 meters! My bad.

[George]

I would have thought that if it was transmitting flawlessly at close range and not at range then it's a transmission fault - not a comms fault

This is how I'm transmitting -

SEROUT PortA.0,0,[$AA,$AA,$AA,$AA,$AA,"A",timeset,1]

this is how i'm receiving:

serin PORTA.3,0,["A"],timeset,b1

[George]

Sorted the problem out finally, the problem is I had a 330 ohm resistor on the supply to the receiver chip, it says to do this in the datasheet if you are intending on using it on 5V - I removed the resistor and ran it on 3V and it works a treat, I might put a couple diodes on it to drop the voltage a little in future.

Thanks for helping out

[Ron Marcus]

What modules are you using?

[George]

LINX 418-LR modules - i ended up running three diodes to the supply of the RX module to drop the voltage - also have a 4.7 Tant to help level supply. The thing works great - I can get 300m now line of sight with just a couple bits of wire for an aerial. I have a 1/4 wave with a very small ground plane on the TX and a full wave with no ground plane on the RX