I'm not sure if this is the property community to ask this in, but it's the best I could find. I'm new to this kind of stuff, so please excuse me if this question is a little stupid.
I currently have a Raspberry Pi that sends rf remote codes to turn on and off outlets over 433 Mhz, so a 433 Mhz transmitter and a receiver are currently hooked up to my pi, and I use ninjablocks' 433Utils command-line tool to send and receive the codes with no problems:
pi@pi:~ $ /var/www/rfoutlet/RFSniffer &  1761 pi@pi:~ $ /var/www/rfoutlet/codesend 123456 -l 180 Sending Code: 123456. PIN: 0. Pulse Length: 180 Received 123456 Received pulse 188 pi@pi:~ $
Now, I am working on another project where I would like to send and receive codes betweens PIs, and I happen to have a 315 Mhz transmitter and receiver lying around that I would like to use. To do a little proof of concept, I simply swapped them out with the 433 Mhz one on the breadboard I am using (although the connections are a little different):
As you may or may not be able to see from the photos, for both transmitters I have the pins labeled GND, VCC, and DATA connected to the same spot, and for the receivers, I did a simple swap since the pins are laid out the same. (One thing to note is that the 433 Mhz transmitter has an antenna pin, unlike the 315 Mhz transmitter).
For some reason, when I run the same command to send and receive a code, I get no output:
pi@pi:~ $ /var/www/rfoutlet/RFSniffer &  1732 pi@pi:~ $ /var/www/rfoutlet/codesend 123456 -l 180 Sending Code: 123456. PIN: 0. Pulse Length: 180 pi@pi:~ $
What's going wrong here? I can think of a few different possibilities, but I lack the expertise to figure it out:
- Do I need to solder a antenna onto the transmitter and/or receiver?
- Do I have a conceptual misunderstanding of rf codes, and so what I'm attempting to do only works at 433 Mhz?
- I notice that the 315 Mhz received says "ATAD" rather than "DATA", like on the 433 Mhz transmitter. Does that mean that I need to invert the signal or something like that (and if so, how?)? I assumed "ATAD" and "DATA" were synonymous when swapping the transmitters.
- Are the 315 Mhz transmitter and receiver are faulty?
If anyone could help me out, I would much appreciate it. Thanks :)