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No more....I think,,,,

Hello everybody. I know that this TX is discontinued and support is probably hard to get, however: can anybody help me to add Potensic A20 protocol support? This is possible in standard 4-in-one modules, should be doable here too.
Thanks.

bonjour ,ou je peux trouver le build de la iRangeX iRX-IR8M avec un bonne version svp ?

For the curious being too lazy to compile themselves...


The build will run on stock hardware (no missing modules!), but requires fix above to make the antenna selection work.

Took me a while, but antenna switching can be done.

First of all it requires good soldering iron, thin wire and a calm hand to do so. It's difficult but doable to directly solder to the STM32's pins.
I use PB3 for PE1 pin, and PA8 for PE2 pin, because they seem to be free, and are not next to each other for easier soldering.
The result may look like this:


See the code at github.com/metalstrolch/deviation/tree/ir8m-missing-A7105-fix

Fixed IRX-IR8M gives TX range for WFLY and DSM2 receivers (don't have others currently) 200Meters or more.

Problem left: Deviation sometimes seems to disturb SPI communication. At least I noticed servos at WFLY receiver sometimes to stutter. This is gone after restarting the TX.
This behaviour is independent from the antenna fix, as it happened before as well.

I think where is some mysterious chip on the back side of the mainboard that connected to PE1 and PE2. Both PE1 and PE2 pads soldered to mainboard, but pad 13 not (not used in IRX-IR8M, but used in T8SG).

It's getting more and more mysterious. I wonder if the IRX-IR8M EVER worked correctly. Even with it's stock firmware. Unfortunately I don't have that.

The IR8M is basically using a common RF_4IN1_V1.0 module which can be found on the "4 in 1" modules like the IRX4Plus.
The pinout of that platine is given in this forum several times: There www.deviationtx.com/forum/3-feedback-que...rf24l01-module#76833 for example.
By using a multimeter (sorry I don't have more fancy tools...) I found out that all lines not being ground, 3.3v or the antenna being connected to the STM32 next to it. All but the PE1 and PE2 lines.

Now I learned from other posts, for example this one www.deviationtx.com/forum/6-general-disc...tion?start=760#76038 that usually some external logic chip is wired between the STM32 and the RF_4IN1 PE1/2 signals to drive them based on chip select lines.

There the real funny things starts: It seems PE1 and PE2 pins are not connected at all on the ir8m. There seems to be no logic driving them and they are not connected to the STM32 alloing that to drive them.
So If I haven't overseen something (remeber: only basic tools and no schematics) the IRX-IR8M could never have worked properly for anything than A7105 based protocols. As this seems to be the default if nothing is connected (PE1 and PE2 low).

Speaking software. the IR8M works with HAS_4IN1_FLASH, as it clearly behaves like one just put a "IRX4 Plus" to the STM32 as one would with the ready made one from banggood. But here, there seems to be no logic driving the antenna select. Deviation NEVER does this, as there seems no TX using the RF_4IN1_V1.0 without helper circuits like the mentioned logic.
Looking at the github.com/pascallanger/DIY-Multiprotocol-TX-Module project, one easily finds the code for driving PE1 and PE2.

So what to do:
- Give up... No.
- Solder two Switches to PE1 and PE2 allowing to manually switch antenna. Low end solution which would even work. But... No
- Find out what the logic does and install it. Maybe, but requires: Parts and soldering skills.
- Connect PE1 and PE2 to free gpio's of the STM32 and drive them like the DIY Multiprotocol firmware does. I think that's the way to go as this only requires some wires and soldering skill. Looks as if free GPIOs is no issue.

Which brings me back to the question: Where in Deviation software structure would be the best place to put the code driving the PE1 and PE2 GPIO's. And how to #ifdef that to not break the other radios.

Probably it can use HAS_4IN1_FLASH feature for switching PE1 and PE2, but some different way. At least IRX-IR8M doesn't work without HAS_4IN1_FLASH feature enabled.

HAS_4IN1_FLASH feature is for victzh's 4in1 adapter with 4MB flash along with the 4in1 board installed. I don't know how it work.

www.deviationtx.com/forum/7-development/...ion?start=1380#68361

As proposed: Here is the code I'm working on: github.com/metalstrolch/deviation/tree/ir8m-missing-A7105-fix

By surprise i got the owner of a IrangeX IRX-IR8M, and I wanted to drive WFLY receivers with it.
Unfortunately WFLY receivers weren't supproted by the Deviation version in it. So I started to update Deviation.
While there are nightlys built for ir8m, none of them seems to currently work. There is another thread about this, but I start my own as I started to fix it.


What I did so far:
- I Identified the commit that broke A7105 module detection (and maybe others). The problems seem to be caused by pinmux, so I don't 100% understand why the revert of that change fixes it.
- I reverted the speedup of the SPI channel. Seems the ir8m hardware layout cannot cope with the higher frequency properly.

Current state:
- Deviation (HEAD) is running on the IR8M again, and at least WFLY and DSM protocols are working. BUT: Signal range is really limited due to PE1 PE2 signals being not driven.

Analysing the limited range:
- The ir8m features virtually the same 4in1 board than the universal module to be installed in other TX. On the web (actually a banggod store...), I found a pinout description telling one needs to drive two pins (PE1 and PE2) in order to multiplex the antenna to one of the four tx chips on the 4in1.
- Measuring it, it seems the current Deviation for ir8m doesn't drive them as they stay all low regardless the protocol choosen.
- Forcing the pins to proper level by soldering resistors to 3.3 Volts pin actually selects the proper antenna and gives full range.
- Unfortunately I cannot measure out any MCU pins those PE1 and PE2 are connected to. So maybe the IR8m is even really broken in hardware.

My Questions:
- Does one know the source code location in Deviation that should usually drive such pins? I know PE1 and PE2 must be present on other models as well.
- Does one have access to schematics of the IR8m?

P.S. I'll post my changes in source code soon.

Hi, as this transmitter seems to be discontinued in the new builds, i'm bringing in back here my issue. Mine is V2 and it was stuck in USB boot loop. so i flash with deviation-ir8m-v5.0.0-b08efa8 and now i encounter this.

irange issue
can any body point me to which firmware that could fix this? or am i out of luck and the rc is good as parts. thanks in advance

So I've been trying for a full day now but can't seem to make it work. I'm using the FrskyX mode, this one works with my 2,5" but not with my Frsky X4R-SB

I'm using the following settings

FrsykX
Failsafe: Hold
AD2Gain: 100
Freq-Fine: -41
Format: EU
RSSICHan: None
S.Port Out: Enabled
Txpower: 150w
Fixedid: 123456
Channels: 16
MixerGUI: Advanced

vlad_vy wrote: I suspect iRangeX has some specific code change for 4IN1_FLASH, with "4in1" RF module output power lines (PE1 and PE2) management. We have not any contacts with iRangeX, so I don't know how to fix it.

Hi Vlad do you think is possible to fix the power issue on 4IN1 module?
I saw the latest builds of Deviation and now it supports telemetry on PXX protocol. something useful in my case.

I cannot upgrade the firmware now because it has some bugs
1) missing modules A7105 message
2) low power on internal module

Do you think there is a chance to fix it?
Regards

does anyone have the original V2 firmware that came with the controller. The one that was labelled IRX rather than the one that was labelled T8SG??

why was the firmware file deleted ? is it because the original firmware is the best one so far . if not where can i download the firmware that works the best for ir8m irangex

Hey there vlad, sorry to b other ya, but i was looking to update my irx ir8m, mi8m, btw mine are one of the first patch jus fyi, anyways, shortly after i got mine, i found that it was stuck in dfu mode, ive even disconnected the internal batt, but it still didnt go back to factory setting. so i figured id attempt to update the firmare and then go from there. so i have been looking for the firmare u posted , so that i can download it, i cannot seem to loacate the firmware, so please let me know where to find the firmware, thankx fyi i did attempt to return but it actually was lost for approx 4 months and then just showd up outta the blue one day6... anyways take care, and i hope you7 help

Thanks a lot, I'll try it tonight

upd: no succ

This is my original firmware that comes with my radio.

Hi guys again

Can anybody upload original fw for 1.1 version? I still get error about missing module, I hope original fw can fix this issue (but I don't believe..)

In the end I bought also a taranis Q x7 .

i8X-IR8M with the original firmware no problem, with firmware deviation-ir8m-v5.0.0-b08efa8 I had to reverse roll and yo.
I'm not an expert there are many videos on Youtube.
I'm beginner.