Discussion in "8051 Discussion Forum" started by    shyamgkps    Oct 1, 2007.
Mon Oct 01 2007, 10:39 AM
#1
can you please explain me how can i access a AT89C2051 Microcontroller with the help of a remote control or any other device and read the data stored in memory
Mon Oct 01 2007, 12:08 PM
#2
do u want to read data stored in internal memory of 2051 ????
better u use an external memory......

for reading u can use a serial rf transceiver pair ....
Mon Oct 01 2007, 03:09 PM
#3
yeah... and simply read bytes from ROM using MOVX command.. and send it to serial port.. after that they will be transfered to other controller who is reading via wireless modules connected.. anything else?
Tue Oct 02 2007, 11:23 AM
#4
ohk let me use an external memory.... let us assume i'm storing particulars about a product in the memory attached to that product... how can i read the particulars from a distance
Tue Oct 02 2007, 11:50 AM
#5
i don't get you? explain in a better way.. external memory (RAM or ROM)
rather can you explain your project in brief? maybe we can help you in a better way!!
Tue Oct 02 2007, 11:59 AM
#6
sir i'm going to store the user details of vehicle on a EPROM....
and attach it to a vehicle and if a policeman want retrive the details of that vehicle he has to access the microcontroller fitted on the vehicle and retrieve the details in his pc without interrupting the vehicle...now pls tell me how can he access that microcontroller
Tue Oct 02 2007, 12:05 PM
#7
oww... so i think microcontroller's memory is enough for small information.. that is going to be stored on chip. you can define it under a label e.g.

info:
db "here the vehicle information"
db "vehicle. no: XXXXXXXXXXXX"
db "owner: XXXXXXX"
db "and so... on whatever you want to store"

this way.. you can store any information.. and to retrieve it.. you can send information or a command from the master controller to read the info and send it to master as per you want..
 shyamgkps like this.
Tue Oct 02 2007, 12:17 PM
#8
ya fine sir......can u tell me a simplest way to transmit data between master and the controller in vehicle
Tue Oct 02 2007, 12:37 PM
#9
use rf transceiver....
frm very begining i knew ur peoject...
so believe me go for rf transmitter and receiver......
Tue Oct 02 2007, 02:41 PM
#10
yes.. 433MHz transmitter and receiver modules are easily available at a nominal cost of Rs. 150

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