Devo 12s 3in1 / 4in1 RF module neat installation.

For what it's worth banggood shipped my 3in1 module out today but yet they site is still set at preordering.Just wondering which module has the best range in a devo 10?

New 4in1 for DEVO TX with adapter board.

I hope this is the right place to ask this question.
I have a Devo 7e with range mod, XL7105-D03B and NRF PA/LNA modules installed as well as 2 x 3 way switches.
I use 4 x AA LSD 2500mah rechargeable batteries. I also have a 2s 1800mah lipo as a spare.

I want to install CC2500 module as well as per page 5 of this thread.
Regarding the voltage regulator of the 7e, do I need to worry about it or will the 7e be reliable and glitch free as is?
Is it safe to use the 2s lipo with the 7e as is?

dc59 wrote: New 4in1 for DEVO TX with adapter board.

Looks good!!
Works well? Ranges?

dc59 wrote: New 4in1 for DEVO TX with adapter board.
...

Does it have LNA issue?

ursus69 wrote: Looks good!!
Works well? Ranges?

All 4 RF chips work well , for indoor 3mw test , almost as same as individual RF module,
but I don't have time to do an outdoor range test for a while.

valley_nomad wrote: Does it have LNA issue?

My 4in1 module is first batch(prototype?) , the seller told me there is only one problem , LNA is not working on A7105 chip,
CYRF/CC2500/NRF24L01 no problem with LNA issue , but I don't have any telemetry receiver for A7105 and NRF24L01,
can't confirm that.

New batch 4in1 module have no any LNA issue with all RF chips.

Gerry wrote: I hope this is the right place to ask this question.
I have a Devo 7e with range mod, XL7105-D03B and NRF PA/LNA modules installed as well as 2 x 3 way switches.
I use 4 x AA LSD 2500mah rechargeable batteries. I also have a 2s 1800mah lipo as a spare.

I want to install CC2500 module as well as per page 5 of this thread.
Regarding the voltage regulator of the 7e, do I need to worry about it or will the 7e be reliable and glitch free as is?
Is it safe to use the 2s lipo with the 7e as is?

I am using 2S 900mAHish LiPo in my devo 7e. The original regulator of the 7E cut off on running certain protocol (e.g. KN). It is definitely too small. I added an extra regulator to feed my A7105 and NRF24L01 RF modules. I have no room to add an CC2500 module since I also have a 8S walkera RF module to replace the 6S.

dc59 wrote: New 4in1 for DEVO TX with adapter board.

this is the same one cmPang shows here >> www.deviationtx.com/forum/7-development/...dule?start=420#48287

and the only thing i don't like the look of is the path the antenna takes to the ufl connector, that trace is most likely a full 1/4 wave groundplane antenna itself :/

Yes this happened to me to. My 3 in 1 order shows shipped even though the items shows pre-order with ship date of June 9th. I was actually thinking of canceling and just using individual modules, guess my hand is forced. Currently don't use telemetry so I guess no big loss. I will use it as is and if the 4 in 1 gets perfected may replace it later.

and the only thing i don't like the look of is the path the antenna takes to the ufl connector, that trace is most likely a full 1/4 wave groundplane antenna itself :/

couldn't the antenna trace be cut as it comes out of the shield and an antenna pigtail be soldered to the board directly. There are 3 pads there.

It would also be easy to move the ufl connector to that location.

midelic wrote: CD4052 on 4in1 module and is not used for switching 2.4Ghz.It is connected with PA/LNA chip TXEN pin and PE1 PE1 Peregrine antenna swicth pins.
If you check data sheet of CD4052 you'll understand how it is working

Good, that is what we need. Did you get the diagram by tracing the 4 in 1 PCB?
Anyway PE1/PE2 should be used to select which RF chip the devo is controlling then, not just leaving them unconnected.

We need a couple of spare pins on the MCU and probably a line added to each xxx_SetTxExMode() to make sure the TXRX control is from the correct chip. Theoretically we can switch it manually as well, just wire a couple of switches onto the 2 pins and switch to the RF chip we are using.

Gerry wrote: I hope this is the right place to ask this question.
I have a Devo 7e with range mod, XL7105-D03B and NRF PA/LNA modules installed as well as 2 x 3 way switches.
I use 4 x AA LSD 2500mah rechargeable batteries. I also have a 2s 1800mah lipo as a spare.

I want to install CC2500 module as well as per page 5 of this thread.
Regarding the voltage regulator of the 7e, do I need to worry about it or will the 7e be reliable and glitch free as is?
Is it safe to use the 2s lipo with the 7e as is?

There are multiple voltage regulators in d7e. If you are talking about the small one, if it's not getting hot now (before mods), then you probably don't have to "worry about it" if not, then you'll have to replace it with a larger one (plus a 1ohm resistor at the output) to get even the un-modded d7e to work reliably.

Regardless of the on-board voltage regulator situation, it's a good idea to have a separate regulator for the additional module/modules.

I don't see a problem using 2s lipo on this transmitter (again, make sure the small 3.3v on-board ldo does not get hot). But then what is the benefit if using the 3s lipo as a direct replacement for 4 aa nimb batteries? With all the linear voltage regulators, the transmitter will be drawing the same amount of current (i.e, run time will not be longer) an you lose the capability of charging the battery in the transmitter. If you'd like to take advantage of the higher voltage of 2s lipo to get longer run time, I suggest inserting a 5v switching regulator before the diode that is at ~5 o'clock of the rf module. You'll see significant improvement in run-time compared to using the 2s lipo directly.

compman2 wrote:

and the only thing i don't like the look of is the path the antenna takes to the ufl connector, that trace is most likely a full 1/4 wave groundplane antenna itself :/

couldn't the antenna trace be cut as it comes out of the shield and an antenna pigtail be soldered to the board directly. There are 3 pads there.

It would also be easy to move the ufl connector to that location.

yeah that's most likely what i'll do, even the flysky/frsky version has the ufl connector right at the edge of the 4in1 board so i don't know why he moved it so far away on the devo version.

for mounting the ufl there i think the ground pads are too wide apart and the rf pad looks wide enough to bridge to the ground pads on the ufl, also having tried soldering these surface mount ufl's before i wouldn't say it would be easy to solder one there lol

@wasp09, @HappyHarry, what are you trying to achieve? To connect 4-in-1 RF module to Devo 7E?

yes, i have one of the new devo versions of the 4in1 en route (that handles antenna switching like the 3in1) and will be mounting it in an 7e-256 that has the stock cyrf module removed, this is mainly for aesthetic reasons of only having one antenna, but i'd still like 4 fully working modules and good performance

If you have Devo 10 version you just need to route signals from Devo 7E mounting place to Devo 10 header. It has all necessary signals and power because despite CYRF modules in Devo 10 and 7E physically different the are basically the same inside, including 5v power supply.

If you don't like RF path on this module (I don't like it either, it does not look like 50 Ohm transmission line) I made a module with 4-in-1 mounted 90 degrees so that the path to U.Fl is really short. I plan to make several experiments to figure out viability of my solution. Do you know SKUs for new 4-in-1 modules?

yes that's correct, and it's good that it uses the 5V line as it wont cause issues with the 7e 3.3V ldo being overworked, cmPang already has one of these new devo versions in his own 7e, and he posted the hookup locations image below


when you get your solution worked out i would be interested in purchasing a pcb, as in the 7e i don't need the header pins so orientation makes no difference, but until then i will break the rf trace as close to the 4in1 as possible and solder a coax to rp-sma header wire right to the 4in1 board terminals. i'm sorry i don't have the new versions sku, i don't think it has one yet as he hasn't listed them on taobao for sale yet, another member arranged the purchase for me directly from the seller.

Apparently, I lost track. I believed this new module just inserts into Devo 10 receptacle, but it's not so. It needs to be connected by extra wires. My module is just inserted into Devo 10/Radiolink AT9.

I hope someday there is a new all in 1 module can really plug and play, no need any soldering job, is it possible ? just like PB's universal module project.