DSM2/X Receiver suggestions for 7E

Hi,
I'm a big time noob, so be nice. I'm in the process of building a x210 quad but I'm still hung up on what RX to use with either with the Devo 7E (which should be here soon).

I plan on getting a F3 Flight Control (Acro 6DOF) and also thinking about the CM621 from BG. From what I understand it is a KO of the lemon kind. Can I bind these with software (cleanflight) or do I need another receiver? I guess it worthwhile to do the range mod as well?

Any help will be greatly appreciated.

Thanks

I'm using a CM621 on a small 160 quad that I fly in view, first crash the flimsy antennas detached, I had to solder new self made ones. No other problems to report.
I suspect range might be a bit short with an un-range-moded Devo 7e. And remember : its only 6 channels.

For bigger quads I use FS-IA6B now, but most people use an frsky module. both need another mod of the 7e however...

Thanks for the reply.

I think I might go for the FS-IA6B as well. From what I understand it requires the CC2500 mod. Is that what you are referring to?

In any case, I plan on installing both the CC2500 and NRF24L01 on different pins in the 7e. From what I understand it's possible on both the a13/a14 pins.

Hello,

Spektrum quad serial satellite diversity receiver SPM4648: www.spektrumrc.com/Products/Default.aspx?ProdID=SPM4648
Looks like it does not offer telemetry.

AR7700: www.spektrumrc.com/Products/Default.aspx?ProdID=SPMAR7700
Again without telemetry back channel.

Carbon receiver including telemetry 6270T: www.spektrumrc.com/Products/Default.aspx?ProdID=SPMAR6270T
Looks like to be missing serial / PPM interface like AR7700.

Spektrum looks to be missing either one or the other important point


If I were you I would probably go for CC2500, as you would have to do the DSM CYRF range mod anyways. ~7mw output power in contrast to Devo 10 / DX8 100mw. Would you really fly your fast quad with it?
FrSky also supports smaller receivers, they include telemetry and they have some serial RX too.

Why did you choose Devo7E over Devo10? Now you would be into hardware CYRF diode modding as well as and Devo7E future firmware support because of its limited memory is already unsure for Deviation.

Latest DSMx thread and protocol fit problems: www.deviationtx.com/forum/protocol-devel...m2-x-protocol-errors
So you probably would like to make a 7E ultimate 256k mod out of it.

joelones wrote: I think I might go for the FS-IA6B as well. From what I understand it requires the CC2500 mod. Is that what you are referring to?

IA6B is FlySky, it requires an A7105 module and latest nightly builds.

If you go with CC2500 you need an FrSky receiver.

ketsa wrote:

joelones wrote: I think I might go for the FS-IA6B as well. From what I understand it requires the CC2500 mod. Is that what you are referring to?

IA6B is FlySky, it requires an A7105 module and latest nightly builds.

If you go with CC2500 you need an FrSky receiver.

Thanks for that, I was unaware. So I'd probably mod the 7e with both the NRF24L01 and A7105 then. Will follow this: www.rcgroups.com/forums/showthread.php?t=2570426 . A couple more questions:

• Does the FS-IA6B / Devo 7E support telemetry?
• Using an IPX Antenna should be sufficient no need to drill an external antenna? (I believe for the A7105 it should be ~30mm so I don't need to route outside of the tx but for the NRF i mean)
• I'm assuming the range mod is only necessary if using dsm2/x?

Range mod is only for CYRF based protocols, if you add additional rf modules (and used receivers based off those rf modules) the process of range modding the factory module becomes moot.

The official instructions for installing modules are in the Wiki: www.deviationtx.com/wiki/rf_module_installation . You're much better off using those than a blog post/forum post (even from this forum)/video/whatever. Those are maintained and updated as things change, whereas blog posts/videos/etc. tend not to get such attention.

On the other hand, the wiki tries to be comprehensive, and covers all supported modules and Tx combinations instead of a specific module/tx combination, which means it may not have as much detail. Specific instructions can clarify things, but let us know here so we can see about improving the wiki.

First done cc2500 RF module upgrade & use Frsky d4r-ii reciver no problems at all.it support RSSI.

lahiru4216 wrote: First done cc2500 RF module upgrade & use Frsky d4r-ii reciver no problems at all.it support RSSI.

Any things I should know about it if I decide to use the FS-IA6B and A7105 compared to the d4r-ii /cc2500 combination? Drawbacks?

IA6B is big and bulky compared to d4r-ii, even the antennas are big with those added tubes - not for smaller quads.
IA6B support is very recent, might not be as polished as frsky.

If he can´t decide on which receiver to choose, he might read and watch this....
www.rcgroups.com/forums/showpost.php?p=35887982&postcount=3353

Thanks for the help guys. I'm probably gonna go with the cc2500 (d4r-ii) and the nrf24l01 at this point. I like the smaller form factor of the d4r-ii which I have on order.

As for antennas for both modules, I assume the optimal setup is to drill a hole through the tx? What kind of antennas do you guys recommend?

For external: Dual Band 2.4/5.8Ghz 6dBi RP-SMA Directional Wireless Wifi Antenna

Or

Internal: 2.4GHz Wifi Bluetooth Ipex IPX Antenna[/ur

Well. get one of the 2dBi antennas.
www.banggood.com/Wholesale-FrSky-2_4G-V8...14.html?rmmds=search
The dual band is not worth the money since it does not work on the 2.4Ghz band as you might expect.
I have two of these....and the the 2dBi has more signal strength. (tested on a router and an usb access point / software: inSSIDer)

Edit: Alternative this one is for you if you like to have bulky one on the transmitter.
www.banggood.com/Wholesale-FrSky-2_4G-V8...tml?rmmds=mywishlist

aMax wrote: Well. get one of the 2dBi antennas.
www.banggood.com/Wholesale-FrSky-2_4G-V8...14.html?rmmds=search
The dual band is not worth the money since it does not work on the 2.4Ghz band as you might expect.
I have two of these....and the the 2dBi has more signal strength. (tested on a router and an usb access point / software: inSSIDer)

Edit: Alternative this one is for you if you like to have bulky one on the transmitter.
www.banggood.com/Wholesale-FrSky-2_4G-V8...tml?rmmds=mywishlist

Thanks, I'm assuming the 2dBi that you're referring to, is the same as part of this 100 Meter Long Distance NRF24L01+PA+LNA Wireless Module With Antenna ? If so, I should be covered. But it looks like the pin is reversed, ie on the antenna portion?

I assume, range wise, I should be ok with the cc2500 & d4r-ii for a x210 close proximity racing?

Can the d4r-ii in combination with the Devo 7E handle and sort of tetemetry like bat voltage? Or is this something that's typically reserved for the more expensive Tx's?

Another stupid question, how do you replace the stock stick controls? Simply unscrew?

The 7e has telemetry. However, deviation on it doesn't have room for the hub sensors. So all you get are the two built in voltage sensors and RSSI data.

With D4R Frsky I have excellent range and vbat and rssi alarm on my 7e.

DSMX, cheap rx with telemetry sbus cppm output are hard to find.......Also I understand that spektum telemetry often has less range than the control range? If need just something for flyign planes no telemetry, this seems to be a good choice.

www.banggood.com/REDCON-CM703-2_4GHZ-7CH...ml?rmmds=newArrivals

For DSM, the latest Orange Rx (from Hobby King) are inexpensive, have built-in telemetry and S-Bus output as well as diversity. Cost is about the same as FrSky. However, check the telemetry range. At least some of them had park flyer telemetry range on full range reciever.

mwm wrote: For DSM, the latest Orange Rx (from Hobby King) are inexpensive, have built-in telemetry and S-Bus output as well as diversity. Cost is about the same as FrSky. However, check the telemetry range. At least some of them had park flyer telemetry range on full range reciever.

Thanks for the replies. Which model do you recommend at HK?

But I think I will use the 7e and go with the D4R and an sp racing f3 racing clone and hope I can get vbat/rssi working on the devo 7e. I'm a noob, and not sure how to accomplish this. But I hope when the parts arrive and I start tinkering, all this will makes sense or I'lll start a fire...one of the two.

What I understand is that the D4R is only 4 channels but in PPM is 8 channels? correct? So at least I would want 5 channels. Looks like I bought the wrong receiver, again...

Doing the 2x3 switch mod makes the 7e, 8 channel capable? Right?