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Messages posted by: Joaquim
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Hello All,

I have one pair of RFM85 TX and FRM83C RX modules both at 433MHZ, and I have a strange problem:

Transmitter off

Receiver connected to a 5V bench power supply, and dataout to a scope. I have the output switching always at random frequency.
I have no RF noise on the environment (other 433Mhz mudules operate ok).

I had try with several RMF83C (I have 5) and all have the same problem.
Antenna is a 16cm wire, but I had try WHIP also, with same problem.
Had try a 100K pull up resistor with no luck...


I'm doing something wrong here? Please help.

I dind't bought the modules here but I hope you can help anyway...


Thanks in advance

Joaquim
 
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