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PIC16f877

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vneelima

Jan 1, 1970
0
Hi!!
Is there anyone who has used PIC16f877 microcontroller for
transmission and recieving of data. I am working on a small project
where I need to do wireless tranmission of data using PIC16f877 along
with TXM-433-RM and RXM-433_RM. I have written a program for data
encoding and decoding but I am having a lot of trouble trying to get
the desired output.Can I get some help.
Thanks
Neels
 
T

Tom M

Jan 1, 1970
0
vneelima said:
Hi!!
Is there anyone who has used PIC16f877 microcontroller for
transmission and recieving of data. I am working on a small project
where I need to do wireless tranmission of data using PIC16f877 along
with TXM-433-RM and RXM-433_RM. I have written a program for data
encoding and decoding but I am having a lot of trouble trying to get
the desired output.Can I get some help.
Thanks
Neels

I have done what you are trying to do yourself with a pic16f871 and the
RXM/TXM-433-LC. To get it to work successfully you need good antenae. I
used the splatch antenae from Linx with my prototype and i managed to get
abour a 50' transmission with about a 0.1% error rate at 2400baud. I found
that the lower the baud rate, the better the error rate. Another issue is
the antena feed line -- it must be impedance matched to the antena. Better
yet be sure the TX or RX RF output pin is less then 1/4" from the antena
input.

Asside from that, be sure to send each data packet thrice and najority check
them for errors. Kills the data rate but saves you from getting garbage
out.

Tom M
 
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