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I need to transmit a string of message between two Radio frequency transmitter. The message will be stored a microcontroller (e.g. 8051). How to go about writing a program for it and how to interface between the micrcontroller and the transmitters. I am still an amauteur when comes to embeded programming. Any source code or info on this ?
Are you sure that built-it serial port is correct issue for this task? I dont know the part number of RF-chip used; you know, many ones do not use simple RX/TX interface but I2C-like or even third-party signaling... BTW, similar problem is 8051 <-> IR-transivers communication: most ones use 1/6 duty signal cycle and so standard UART (duty 1:1) cannot be used directly :(
OK, I don't know if we're talking about the same thing here. I'm talking about a Radio Frequency transceiver interfaced to a 8051 type microcontroller, not infra-red transceiver. The protocols of these two differ a lot. If you're using RF transceivers, it's by far the most reliable, and easiest to use the microcontroller's UART. You simply use asynchronous serial data transmission, and the transmitter converts it to RF signals. The inverse of this is done at the other end, and the data received at the other end is the same as that which is transmitted. I KNOW this because I did it like this several times, and it worked. If you look at the big picture, this is a datacomms setup (only difference in OSI physical layer) , and the medium is just a pair of RF transceivers, instead of twisted pair. Infrared is something different, but if you have a serial to IRDA converter, you can use infrared in the same way.
You mentioned you have successfully interfaced a micrcontroller and an RF transmtter. I will be very much appreciated if you can send me the source code for that. Thany You.
Do you have the setup in circuit diagrams and the source code for the 8051 ?
hi,,, i need how to interface the 8051 at an RF tarnsmitter,,, please send code
please send circuit to my email khalili_m1@yahoo.com
can you send me a sample projects...a simple projects not that is not so expensive and easy as well..