sharang said:Thank you sir.One more thing we tried our code with Xbee rf modules without using ht12e and ht12d and it worked perfectly but it is not working with any ask based or fsk based rf modules..???
i am presently doing a project and therefore need your help. The module consist of two 8051 microcontroller devices which performs wireless transmission of data in a duplex fashion. Each device consist of a LCD, 8051, Keypad(4x4), transmitter and receiver. 8051 takes the input from keypad and displays on the LCD within the device. this data(on the lcd) is then transmitted by 8051 to the other device(wireless transmission) and is displayed on the LCD of the other device. Hope u hv got the idea. so plz cn u give the module and wat r the various requirements and codes(in c).
Hi jahangir,
It is very simple. just bye one RF transmitter and one receiver in the same frequency. they are very cheap. then connect to your micro TX/RX port and send each byte of data in serial mode.
i think this is not going to work....
you need to do some sort of channel coding like manchester.. to send data wirelessly.. direct UART serial data wont work..
dear nikhilele,
I've done this and worked very well. the way that I explained doesnt need any wireless work cos you just need to buy RF modules and all the works like coding has done in this modules. their interface is very simple and accept power and serial data. connecting them to micro USART and sending data through it is possible. searching in internet you will find many results if any body wants I can tell part number.
good luck.
Hi
can u please tell me how to interface RF module with 89s52 without using TX RX pins? any encoder/decoder to be used?
Yes, that's the right way to handle it. You should also provide a bitwise synchronisation at the receiver, so it can immediately sync on the preamble data pattern.Now i am going to write a code to encode data like manchester or equivalent so that i dont need encoder and decoder and i can connect tx modules and rx modules directly to MCU.
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