nRF24L01+PA
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for example : http://www.ebay.com/itm/2PCS-2-4G-NRF24L01-PA-LNA-SMA-Antenna-Wireless-Transceiver-communication-module-/400673455926
U know this ,that external antenna with external amplifier must make twice more distance..
Twice the distance through air, perhaps.
But, through a wall constructed of concrete reinforced with steel... well, it may penetrate the paint twice as deep, I guess.
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Guys, please have a look at http://forum.mysensors.org/topic/182/standard-versus-lna-pa-radio-modules
Ignoring antenna effects, if only one side has a ePA + LNA your link budget is only 2.6 dB better. In open air 6 dB means doubling the distance, in other environments you need often 10 dB extra to double distance.
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Free space is a good start but like indicated there are still numerous gotchas:
- How is the powering/decoupling of the radio's
- Are the antennas pointed to each other
- How high are the antenna placed above ground
What is the range you get?
Some photo would be nice. -
...ehm... today I make some test..
I test standard module (PCB antenna ) and module with external antenna..
same result .. if use standard module then 30m is distance +- few meter .. with external antenna also same distance ..
I solder big capacitor to mule 2200uF , 6.3V .. and power 3V for node and 3.3V for gateway ..I make test with all antenna what I have .. must find beter antenna and will make testing again.. ..
in osme forum I read that user have with 1Mb speed 540m distance..regards..
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I test standard module (PCB antenna ) and module with external antenna..
same result .. if use standard module then 30m is distance +- few meter .. with external antenna also same distance ..30 meter is less than I would expect for two antennas seeing each other and enough clearance but to give some meaningful feedback a photo would help.
I solder big capacitor to mule 2200uF , 6.3V .. and power 3V for node and 3.3V for gateway ..
A big capacitor is not better, what counts is ESR (or the "Freq. measured" in the table) and the capacitor being big enough. The higher the frequency the better the capacitor can "reject" high frequency noise on the power supply.
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@dzairo I'm using nRF24L01+ with PA on my server side and normal NRF24L+ on node side. At beginning I have norlam NRF24L+ on server side. I dint't see big improvement in range/reliability when I change to PA module. But I notice something strange. PA module works better with PA_HIGH than with PA_MAX.
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Hi all I find this :
https://www.youtube.com/watch?v=lR60toEjHl8
and this : https://www.youtube.com/watch?v=5Xhvphsj1ms
and now say me what is wrong in my testing.. I must contact video producer for question..
regards.
