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Author Topic: (RQ)Help about RF TX-RX modules  (Read 3407 times)
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sam_des
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« on: January 14, 2010, 07:06:39 19:06 »

Hello,

I am currently trying to do RF comm. between 2 micros. My local shop offered me a TX-RX module pair. I tried to find some more data about  these, but haven't got much.

The TX module is numbered R433M & has no visible IC & has pin config - GND, DATA, VCC, ANT.
The RX module has an IC- HIMARK RX3400-LF & has pin config -GND, DATA, DATA, +5V, +5V, GND,GND,ANT.

I figured out that both are 433MHz modules. But I need more information, especially datasheet and app. notes, so that I can start experimenting with modules. Any examples will be an added advantage.

regards,
sam_des

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nighthunter
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« Reply #1 on: January 14, 2010, 08:13:22 20:13 »

here are the datasheets, i used google, it took 10 secs to find the specs,
& here is some discussion about experimenting using RX/TX modules http://www.8051projects.net/forum-t20068.html
« Last Edit: January 14, 2010, 08:16:38 20:16 by nighthunter » Logged
maduran
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« Reply #2 on: January 14, 2010, 08:48:40 20:48 »

I used a Polygon nRF905 OEM Carrier Module:
http://www.rfdesign.co.za/pages/5645456/Products/Wireless-Integrated-Circuits/Transceiver-ICs-433-to-915-MHz.asp

The nRF905 is a robust communications solution (ShockBurst) : http://www.nordicsemi.com

It is recommended to buy a module : http://www.gsmcommander.com/downloads/files/Cxxx%20manual1.1.pdf
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cipiloi
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« Reply #3 on: January 14, 2010, 09:13:01 21:13 »

Hi, this is super! http://amber-wireless.de/files/amb8420_ds.pdf
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Jeckson
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« Reply #4 on: January 15, 2010, 02:38:18 14:38 »

Hai
Great sonsivri

Also I'm looking TRX module.At frecuencies 50-60-70Mhz to get long distance and almost silent here.

jeckson
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king
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« Reply #5 on: January 16, 2010, 11:37:12 11:37 »

Hi!

Why don't you use TRW24G modules to Transmit and Receive Data at the Distance of 180 Meters,
also the complete project has been uploaded on Sonsivri (Projects)
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Jeckson
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« Reply #6 on: January 16, 2010, 03:00:10 15:00 »

Hai

King

>Why don't you use TRW24G modules to Transmit and Receive Data at the Distance of 180 Meters

Too short distance.

Something with 500mW but have distance 100Km ~ and the characteristic between HF and VHF to avoid F and E layer problem(depends on sun and day).

Regards
Jeckson
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manish12
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« Reply #7 on: January 16, 2010, 04:53:52 16:53 »

i generally use 4 sw rf module for transmitting upto 500meters ,
it is great to transmit without error ,
logic is >>
4 sw has upto 16 combination
convert the hex number into decimal , use 1-A for 0-9 and use B-F for transmitting start and stop of byte .
it is also use in bi direction communication ,
tested ok... no doubt  
if find helpful  press tanks button
>>  i always face an environment, which demand must design with available resources  
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Jeckson
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« Reply #8 on: January 21, 2010, 02:51:43 14:51 »

Manish12

500 meters to short...
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manish12
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« Reply #9 on: January 21, 2010, 04:15:31 16:15 »

a cheap walkies tokes may solve your problem for 10-20km
if you need more than that , just buy a fm transmitter 4-5w
 
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oldvan
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« Reply #10 on: February 04, 2010, 10:32:38 22:32 »

a cheap walkies tokes may solve your problem for 10-20km

Impressive range for cheap walkie-talkies, where can I buy such a pair?
Any of the cheap ones I've encountered claim 2 km range and are somewhat likely to work for about a city block on a good day.
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