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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 ?
There are already 8051 devices with built-in RF Transceiver. Take a look to the parts from Nordic (http://www.keil.com/dd/cl/nordic/8051.htm) or Chipcon (http://www.keil.com/dd/cl/chipcon/8051.htm). Both companies supply starter kits with example projects that help you to get started quickly.
i'm doing a project on Nurses alerting device that consist of a push button acting as a transmitter. when it is press the transmiiter will send data encoded to a receiver and decode it back and a buzzer + LED will light up depending on which paitent is needed. the problem is how many receiver should i use? let say i create 4 transmitter for 4 patients.. and i only use 1 receiver, when 2 paitent press both at the same time the reciever simply reject both of them .. how can i solve this issue?? i need advice.. i thought of 1on1 basis.. meaning each transmitter will have their own reciever end but it would be costly to have so many recievers.. any other way.. i'm using RF transmitter and using 8051 Need assistance thanks.
I want to know,RF transmitter can be use in the ICU room?Because the ICQ is strict,on the EMI. I think the problem is easily.but i think use the cable net better than RF transmitter,else your will be use in field. you can use 2 cable in this net,if you know like that 1wire protocol and I2C or UART.and you can using one computer for the monitor.or using your buzzer and led. however, i don't know what about u priject detaild. jane
but,if you want to using RF transmitter,i will give u a few pointers. tell me u e-mail.
dawsonyeo@yahoo.com please give me advice. Okie.. This project has already been done by the last batch of student.. what they have done is using Radiometer Tx2 and RX2 UHF. It also consist of encoder HT 12E and decoder HT12D the prototype they come out has only 4 transmitter each having their encoder. the encoder will encode a pre-set data send it to the transmitter when the push button is press. the other end has only 1 receiver linking up to 4 decoder - it will decode(pre-set) the data and light up the LED n buzzer respectively The problem now is when 2 patient press at the same time. at the reciever end there won't be any signal as the signal has clash. How can i solve this problem. how can i synchronise the device to make it accept 1 and reject the other and mean time sent back a reject notification.. I review the pass few post from this page notice my project is somehow related to what u'll are saying only problem is
i need to modified the nurse alerting system to enhance it to attach the telephone line to speak with them. Anyone can help me think of a way to link up my transmitter to a voice intercom ..any circuitry?? i still need to add in other feature into this project SOB~~ hope anyone can help.. or if u'll think any other things i can imply to the nurse call device please phase out ..thanks