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07-09-2005, 07:17 PM
i want to know wheather i can use a wireless transceiver instead of cable without any/much changes in existing harware or software?

what baud rate does it support?
how much does it cost for 2 way full duplex device?
where in mumbai can i buy it?
does the transceiver need any kind of tunning or tweaking before use?

rao
07-13-2005, 08:47 PM
I used a 2.4 Ghz wireless transceiver for full duplex communication between
my computer's serial port and my roboti's microcontroller...

It supported bauds upto 115,200bps.. but I used plain ol' 9600bps

I used it instead of a 3-wire interface...

I just had to make changes with the software without making any significant changes to the hardware..

but I had to import those transcievers...

If you want more info... ask

Rao
co-admin

07-14-2005, 07:36 PM
why did u need to change the code? wired or wireless shouldnt that be irrelevent to the uC ?
anyways what changes did u make?

the guy at a shop i visited told me that 1 tx/rx pair costs Rs. 700.
It has a range of 30m and works at 44Mhz. Since i want 2-way communication i'll need one more pair. they only have 44Mhz modules, if i buy two identical pairs i guess they would interfere and neither would work, but the guy said they would work, i'll have to do some 'coding'. what does coding mean?
by the way how is the deal ?

ice
07-16-2005, 10:04 AM
Rao's talking about radio modules...these are differesnt and they transmit "data" serially..

You may be talking of modules used in RC cars (either 2 , four or more channels). You can transmit signals to 'em.like an "ON" or an "OFF"

What rao meant by "coding" involves initialising the radio,forming a data packet and sendng it.They cost a bit,but they make life easier.



It has a range of 30m and works at 44Mhz
To be honest,ive never come across modules at that frequency..Radio modules for data transmission are at 433Mhz,869Mhz,914M,2.4Ghz etc..

Companies like Radiometrix,Lynx,Ming sell these modules

07-16-2005, 05:08 PM
i am talking abt modules to that can be used to transmit serial data. there will be uC at both ends.
i basically need a wireless data transmission and reception (2way) system to communicate between two uCs or one uC and serial port of a PC.

what is it called? what should i ask the shopkeeper?
how much does it cost in mumbai?

mercury
01-21-2006, 09:50 AM
hi
Mr.Rao can u pls tell me from where did u import these modules..their cost and specs

Me working on a project on duplex communication btw two PC using serial ports

Thank You