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Old Jun 03, 2013, 01:37 PM
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2.4ghz transmitter using NRF24L01 transceiver module

My idea is to build a RF transmitter (2.4ghz / 6 ch) using NRF24L01 chip to control mini beetle quad from a pc or arduino.

Is this possible ?
Can any one please provide me some help.

Does all the 2.4ghz transmitters work similarly? or they vary with manufacturer?

FYI:-
My transmitter contains:-
NRF24L01 chip
Arduino board for program

My receiver is mini beetle quad (i dont need to make any alterations here)
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Old Jun 03, 2013, 01:58 PM
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Which mini beetle ? Model number.
There are not many NRF protocols been done.
http://www.deviationtx.com/forum/pro...-v202-protocol
http://www.rcgroups.com/forums/showthread.php?t=1564343
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Old Jun 03, 2013, 02:25 PM
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it is V929
http://www.banggood.com/Wholesale-WL...F-p-46046.html this one
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Old Jun 03, 2013, 02:40 PM
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most likely wrong about this but sure its not A7105 RF?
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Old Jun 03, 2013, 02:45 PM
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im very new to RC, trying to learn.
is it possible to build such transmitter using NRF24L01 if we know the protocol or correct make of the transmitter?
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Old Jun 03, 2013, 02:52 PM
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yeah anything is possible just I'd check that your V929 is NRF24L01 and not A7105.
A7105 TX and RX have been done all ready. http://www.rcgroups.com/forums/showthread.php?t=1798913 RX and done have TX link but its in that thread.
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Old Jun 03, 2013, 10:58 PM
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Take a look at this thread: http://www.rcgroups.com/forums/showthread.php?t=1833077
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Old Jun 04, 2013, 05:34 AM
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Quote:
Originally Posted by Heavy_Duty View Post
Thanks a lot for that hint
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Old Jun 04, 2013, 03:34 PM
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Do you think the serial communications is viable for this? I don't know much about radio equipment, but I have been looking for a viable way to control many functions, and the traditional method (PWM ?) seems way expensive once you get beyond 9 channels. His serial system goes > 128. He is using the NRF24L01 modules for the transmitter / reciever.
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Old Jun 04, 2013, 04:21 PM
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People still use PWM?!?!? maybe in some "compatibility mode," but for radios it's much nicer to use binary data over a serial link. That's what we do.

Andy
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Old Jun 06, 2013, 02:24 PM
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the problem with deviating from old and reliable pwm/ppm standards is that everybody uses their own incompatible format. remember the tower of babel?
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Old Jun 09, 2013, 11:24 PM
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Quote:
Originally Posted by dave1993 View Post
the problem with deviating from old and reliable pwm/ppm standards is that everybody uses their own incompatible format. remember the tower of babel?
Yep. Welcome to the world of 2.4GHz RC.

Most 2.4GHz chipsets make it way easier to send serial bytes than to send timed pulses. Mainly it's because they're designed to interface with software, not hardware (Wifi, Bluetooth, ZigBee etc..).

With 2.4GHz systems you have more than just the signal format that defines a protocol (and therefore compatibility). How transmitter (and on some systems, receiver) id is assigned (bound) and interpreted may be different. How the transmitter and receiver negotiates what channel (frequency band) to use may be different. How much bandwidth is used may be different (Wifi chipsets use a small number of wide band channels but ZigBee and Bluetooth chipsets use a larger number of narrow band channels). If frequency hopping is implemented, then how the hopping sequence works may be different. The actual modulation of the digital signal on to the radio frequency? The bitrate configured? How often packets are transmitted? Error checking algorithm (if any)? Is burst mode used? Is it raw byte stream (radio modem) or 802.11 or 802.13 link layer?
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Old Jun 10, 2013, 12:50 AM
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you can try this application note for the nordic NRF24L01

NRF24L01 this rf ic is easy to program compare to any other device in the market.
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Old Jun 10, 2013, 03:05 AM
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Originally Posted by tune by tito View Post
you can try this application note for the nordic NRF24L01

NRF24L01 this rf ic is easy to program compare to any other device in the market.
He's trying to make the NRF24L01 communicate with his WLToys V929 quad. Which is something much more complicated than just making the NRF24L01 "work".
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Old Jun 10, 2013, 12:18 PM
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Quote:
Originally Posted by debianmaster View Post
My idea is to build a RF transmitter (2.4ghz / 6 ch) using NRF24L01 chip to control mini beetle quad from a pc or arduino.

Is this possible ?
only if you replace the electronics of the beetle. wlt uses a7105 not 24l01. here are the right threads for what you want:

http://www.rcgroups.com/forums/showthread.php?t=1798913

http://www.rcgroups.com/forums/showthread.php?t=1626362

contrary to popular belief most trancseiver chips cant be simply re-programmed to support alternate protocols. there are built in hardware features that pretty much favor one over the other. imo "universal radio" is a pipe dream. best bet is a cheap bay radio like 9x and set of appropriate modules.
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