Hello everybody,
I'm using an RF module to send an 8 bit binary number through a microcontroller. The operation is simple; when I press a button on the transmitter end, the μC sends the information and when received by the other end, the receiver μC toggles an LED.
My problem is that there is a lot of noise. I have two receivers (433MHz), one is pretty good one which works for about every 8/10 button clicks, and the other is really bad which works for about 1-2/10 button clicks. I'm using a linear wire antenna.
Here is an oscilloscope image of both receivers (this noise is when receivers are idle):
Good receiver:
Bad receiver:
exact product I am using
Here is my μC code (ATMEGA 32A):
Transmitter: http://pastebin.com/dX72mAkJ
Receiver: http://pastebin.com/BTDhdQ3u
Both of my receivers and transmitter are OOK/ASK modulation, is this the problem? I've tried adding capacitors across data/VCC and data/gnd pins to get rid of the noise but I have had no luck.
By the way, my 'good receiver' is damaged. When I first got it, I accidentally connected it to a 9V battery and it started smoking. It still works, but it gets VERY HOT, but it doesn't smoke. Is it still ok to use?
I appreciate the help,
Thank You.
I'm using an RF module to send an 8 bit binary number through a microcontroller. The operation is simple; when I press a button on the transmitter end, the μC sends the information and when received by the other end, the receiver μC toggles an LED.
My problem is that there is a lot of noise. I have two receivers (433MHz), one is pretty good one which works for about every 8/10 button clicks, and the other is really bad which works for about 1-2/10 button clicks. I'm using a linear wire antenna.
Here is an oscilloscope image of both receivers (this noise is when receivers are idle):
Good receiver:
Bad receiver:
exact product I am using
Here is my μC code (ATMEGA 32A):
Transmitter: http://pastebin.com/dX72mAkJ
Receiver: http://pastebin.com/BTDhdQ3u
Both of my receivers and transmitter are OOK/ASK modulation, is this the problem? I've tried adding capacitors across data/VCC and data/gnd pins to get rid of the noise but I have had no luck.
By the way, my 'good receiver' is damaged. When I first got it, I accidentally connected it to a 9V battery and it started smoking. It still works, but it gets VERY HOT, but it doesn't smoke. Is it still ok to use?
I appreciate the help,
Thank You.