Devo7e work

OnceAFly wrote: Do i add the diodes to both switches only or all 2 existing and mod switches including trims and buttons?

Pretty sure cmpang only added the diodes to the new switches.
rbe2012, if "just about any" diode can work, how about an LED? Don't think I've got any spare "normal" diodes handy, but I've got a shipload of LEDs...

Xermalk wrote: I'm guessing there's no way of adding a pot instead of a switch?

Not as part of the matrix, it's digital logic only. I queried a few pages back as to whether for example one of the current switch lines/pins could be remapped as an analogue rather than digital input; I think the main issue is that that kind of mod would be very user specific, most would want to keep the current switches as they are and maybe add a few more.

Maybe there's an unconnected pin spare that could be mapped as analogue, but you'd have to do some extremely precise soldering to connect to it, as usually unconnected pins terminate at the pad without any connecting traces to tap into.


PB, where's the best place to raise generic feature requests? In the devo7E thread on rcgroups the user Mike Meyer mentioned the 9X has "sticky" throttle hold and was asking of the 7E could do this, here's the gist of my reply:

If I'm reading right, that means that the throttle hold stays on after you engage the switch until you pull throttle to zero? ie., even if you flip the switch back, it still remains in throttle hold mode until you revert the stick?
If so, I don't think that's in deviation at the moment (could be wrong), but I reckon it would be a relatively straight-forward inclusion; have a search in the deviation forum, and if nothing comes up post a request outlining exactly how it's supposed to react.
My brief thought is that the TH switch could just set a flag, that isn't cleared until both the TH switch is back at 0 and the throttle stick is reading 0. Until that time, TH is active and overrides any throttle inputs.

I really need to get a dev environment set up here and start digging into the code to see if I can nut out what part does what.

Hi PB,

find it today that while in the Mixer setting, the curve display disappeared.. does it only happened in this specical version?

Xermalk wrote: .... but you'd have to do some extremely precise soldering to connect to it, ....

yes and it is the reason that I would really like to add the two digital switches as it is very easy to do.. there is no point for a mod that only a very few members here are capable of..

Im having a very confusing issue with my Devo 7E.

And im not sure if its hardware or software.

When i lower the left stick (Throttle), the tx battery reading is lowered.
From 4.7V -> 3.75V. When i move the stick back up again the voltage reading is increased. (voltmeter says 4.9V across the battery pack)

This only happens when the throttle/pitch stick is moved and is completely unaffected by the other switches /buttons / sticks.

I see no reason for this behavior, and when i inspect the cables to the pot they look just fine.

deviation-devo7e-7b864654abff

Xermalk wrote: Im having a very confusing issue with my Devo 7E.

And im not sure if its hardware or software.

When i lower the left stick (Throttle), the tx battery reading is lowered.
From 4.7V -> 3.75V. When i move the stick back up again the voltage reading is increased. (voltmeter says 4.9V across the battery pack)

This only happens when the throttle/pitch stick is moved and is completely unaffected by the other switches /buttons / sticks.

I see no reason for this behavior, and when i inspect the cables to the pot they look just fine.

deviation-devo7e-7b864654abff

I'd tried it with the same result.. from 4.93 to 5.92

cmpang wrote:

Xermalk wrote: Im having a very confusing issue with my Devo 7E.

And im not sure if its hardware or software.

When i lower the left stick (Throttle), the tx battery reading is lowered.
From 4.7V -> 3.75V. When i move the stick back up again the voltage reading is increased. (voltmeter says 4.9V across the battery pack)

This only happens when the throttle/pitch stick is moved and is completely unaffected by the other switches /buttons / sticks.

I see no reason for this behavior, and when i inspect the cables to the pot they look just fine.

deviation-devo7e-7b864654abff

I'd tried it with the same result.. from 4.93 to 5.92

/pheww though it was hardware issue, i noticed it just as i was about to bind the third battery for the day on my master cp, and it wouldn't bind. Not doing 3d, and using a fixed speed in my esc with soft start so wouldn't have noticed it ussualy.


Its also present when the charger is connected. from 7.01V -> 6.09V

Anyone without flysky/bridged diode mod that could check to?

FDR wrote:

RoGuE_StreaK wrote: In the devo7E thread on rcgroups the user Mike Meyer mentioned the 9X has "sticky" throttle hold and was asking of the 7E could do this, here's the gist of my reply:

If I'm reading right, that means that the throttle hold stays on after you engage the switch until you pull throttle to zero? ie., even if you flip the switch back, it still remains in throttle hold mode until you revert the stick?

The main problem with it, that (apart from the 'Standard' UI) we don't have a dedicated throttle hold function/switch...

The 9 doesn't have a dedicated throttle hold switch, either. Then again, running Open9x, it doesn't have any dedicated switches.

The sticky throttle hold is implemented using a pair of software switches (similar to the stick position switches in devention) and a software channel.

One software switch follows the throttle, going on when the throttle hits bottom. The software channel retains it's old value, unless that software switch is on, in which case goes to bottom, unless a hardware switch (typically throttle cutoff switch, but it could be anything) is on, in which case it goes to top. Finally, that channel controls the second software switch, setting it to on/off depending on whether it's above/below midpoint. That software switch is then used for the "throttle hold" switch.

It's a little bit convoluted, but it's all done in the Tx config, no software mods required, and on a transmitter with much less capable hardware than the 7E.

Hi cmpang
Could you please post pictures of the completed switch mod. I have a hunch of it butt I get so much more serten when I can see it done.
I am certain I can help the community I just need to get up to date.

By the way the shield for getting to the diode to be shortened is really a cracker to get rid of.
To get it of in a hurry dremel it in 4 or 8 places, don't leave any debri, use vacuum or compressed air. remove it and clean up.
Remove the diode with a not to hot iron, and replaced it with a piece of coated copper wire (wires) in the right length and thickness. Preferably with a pair of teflon tweezers or timing. From one nob to another.

Mullson wrote: Hi cmpang
Could you please post pictures of the completed switch mod. I have a hunch of it butt I get so much more serten when I can see it done.
I am certain I can help the community I just need to get up to date.

will do it later tonight..

FDR wrote:

cmpang wrote:

Mullson wrote: Hi cmpang
Could you please post pictures of the completed switch mod. I have a hunch of it butt I get so much more serten when I can see it done.
I am certain I can help the community I just need to get up to date.

will do it later tonight..

Perhaps you could post it in the 'How To' section...
Thanks!

Done...

I have the same since I`ve upgraded to build dcbb8c671. Jumping from 4.91 to 5.9 volts and various values in between. Changing protocol from flysky to dsm2 doesn't change it (I have installed the RF module from HK GT2 car radio -> hoping for higher range, devo module is stock 7e).
It was hopping only in the 10ish millivolt range before with the firmware from the devo12s thread (ending 1f1, I think it was).


HTH, Stefan

Another quick question about the replacement of devo7e's RF module with the one from 6s/8s.
Can anybody point me to a complete pinout of the 8s module (WK-21201RF). What I've digged from the devo8 connections and the flysky doc looks like:

1 NSS??
2 SCK
3 GND
4 SDIO
5
6
7 MOSI
8 GND
9 MISO
10RESET

(referring to the numbering as shown in the flysky doc).

I would like to match it to (taken from PB's post, earlier in this thread):

1) Chip Select
2) CLK
3) MISO
4) MOSI
5) Reset
6) Vdd
7) GND

Cheers, Stefan

Devo 10 has some issues too, voltage reading is ~1 volt lower than real. No jumping though.

Could the low pass filter be disabled for voltage reading?