FlySky GT3C Firmware upgrade

[@RuudK.]

I used this tutorial for upgrading my GT3C. Very clear and helpful. Thank you.

[@MakerFabio]

super clear, thanks. I modified my 2 GT3C

[@terminalpsychosis8022]

Absolutely beautiful walkthrough. A guy can do this on their own from reading, but it's nice to half confirmation of the steps.

[@vinnydags]

Great tutorial, been meaning to do this to my GT3C for years. Followed your video and had quick success. Simple, clear, and informative, thank you.

[@steven-vn9ui]

I wonder if this would help with my problem of the radio resetting the servo reverse settings on channel 1 and channel 2 from time to time.

[@rlccunhinha]

Thanks, you made my day! I followed your video and change easily de firmware!!

[@joheitfpv3990]

Perfect description. Many thanks!

[@petertothRC-FPV]

Lost my mojo for rc cars 15 years ago hope to find it with this transmitter good show.👍

[@AndyX]

i missed something ,,i have this transmitter ,, but why am i doing this ? could this firmware upgrading need have been mentioned up front ? thanks in advance

[@fruitycoconut]

Had to use 3 differents stlink dongle to have a working one. Tried 3 pc, 2 flysky gt3c to realise maybe the usb interface was in faulty. Thank you for your tutorial

[@imtrung5244]

Any st-link v2 will be ok. Just open st program then plug in usb stlink. Then everything is fine

[@fruitycoconut]

@@imtrung5244 Look at the comments here and on amazon. Some are faulty. I spent multiple night trying everything, I'm used to hack my devices like that, but nothing worked until I changed st-link

[@leonfernando6359]

But the 6 and 8 channel receivers are made for planes will the receivers still work inside a rc car with the modded radio?

[@michaeldeering798]

Great stuff, it would have been nice to see how the new channels corresponded with the buttons but Im sure its in the manuel

[@RCMojoTV]

Other than the steering and throttle all the channels can be configured to control any function

[@MrBobdilly]

Fantastic vid, really makes a potentially daunting task very straight forward. In the vid you mention briefly that it is possible to replace one of the switches on the grip with a variable resistor... Any details? I'm looking to use it for variable moa motor mixing 'on the fly'. What size/type of POT would be appropriate? Thanks :)

[@RCMojoTV]

If I remember rightly there's a document on the git with the firmware that describes how to set it up. Most likely it'll be a 10k pot with the ends of the track connected to 5v and ground, then the wiper to one of the wires going to the button

[@UmarRCz]

And what hack firmware update is this? Is it Firmware 0.6.1 update? I want to primarily update my GT3C because i can get more steering trim like upto 100 on both right and left sides, the stock one is too less, it only has 30. Does this update you did increase the steering trim amount to 100 for both right and left sides??

[@momothemilkman]

Really great video here. Thank you!

[@momothemilkman]

Five month later and I just got around to reprogramming my GT3C. It was a piece of cake with your instractions. Thanks again!

[@seavee2000]

very clear,and no waffle at all....

[@rccvs4355]

but i quick question. Have you tested if you can with this controller switch back and forth with 2 rigs without the need of powering down 1 of the rigs)? My friend as a DX5 and it can do it. Also those extra switches can be used for lights and so on? Great video !!

[@RCMojoTV]

Spectrum has what I think they call model match, so when you bind the specific model memory is bound to the receiver. FlySky and most other cheaper radios just bind the transmitter to the receiver so you'll need to make sure you've only got one model powered at a time. With the PSX firmware you can use all the buttons to control up to 8 channels, you can get all sort of light and sound modules you can connect up

[@RCSteve]

Might be an idea to reverse the direction of the encoder, so the cursor on the lcd screen moves the same way as the wheel.

[@RCMojoTV]

That’s a good point

[@06madmartin]

Thanks man I'm buying the programmer now I'm sick of my gt3c beeping at 3.6v last a few hrs then need charging to stop the noise ahh lol wanted to set it to 3v and this looks like the best way and I get 8 channels too Brucey bonus

[@o2telematicssolutions450]

excellent video,

[@SerxRox]

I'm considering the firmware upgrade, not just to fix bugs and get more from it, but to improve latency. Does this happen with the modified firmware? Will latency improve? Honestly it feels pretty laggy, high input latency when driving around. Changing to a faster servo and a better RX didnt help much.

[@RCMojoTV]

I wouldn't have thought so, if anything it could be marginally slower dealing with 8 channels. I tend to use the radios with larger wheel trucks and old Tamiya's with their typical sloppy steering so it's never really cropped up

[@gabrielvalanciofernandes3960]

Hi is it possible to get the backup firmware file from you? I flashed mine without taking a backup and I want to restore the original firmware.

[@bergcrawler1]

Thanks for informing.. best video on mod

[@UmarRCz]

Hi, id really appreciate if you can reply and help; ive just followed your video and updated it to PreRelease 0.6.2.S19 as shown in the video, i updated it primarily to get more trim on steering, but my diatone Q33 rc car still doesnt go straight as the steering trim still is not enough to make wheels go straight in centre, The trim level have increased to 99 on both right/left with this firmware but it still makes no difference when calibrating to even fully to 99 on either side; the wheels just moves very little and just acts like the normal stock which had 30 trim level. Is there something can be done to make steering trim work properly or is it possible to make the car wheels into centre position?? (When i bind the car it binds with the wheels turned to one side and with the trim i try to move wheels into the centre and its not enough trim to make wheels to centre).Thanks in advance

[@RCMojoTV]

That sounds more like an issue with the car. It could be a mechanical problem where the steering is offset from whatever is giving position feedback to the electronics. I'm not familiar with those little cars so I'm not sure how to fix the problem

[@UmarRCz]

@@RCMojoTV yes its because how the car steering is setted. Luckily was able to solve the issue by taking out the steering mechanism and recentering it in the middle, that way not much steering trim is required from the controller to straighten the wheels.

[@nrs91]

Ive been looking for a pistol grip radio for my RC trucks. How do you operate the additional channels after this firmware update?

[@RCMojoTV]

All the buttons become assignable, so for example you can change the steering trim buttons so they control a channel or other function. The user interface isn't great and to get started you really have to study the manual for the firmware, but one you get the hang of it it's a good flexible setup

[@nrs91]

@@RCMojoTV ah ok thanks! Is there a way to add dedicated switches to the circuit board?

[@RCMojoTV]

Not dedicated, you would have to wire in parallel with the existing buttons. The other options would be a modified GT3C that has a hardware addon to add the extra channels. You get some knobs and switches to play with but it uses the standard firmware so isn't as flexible. They were available for around £50-£75, it seems they're not so common now, here's an example of what to look for: www.aliexpress.com/i/32830169709.html

[@nrs91]

@@RCMojoTV cheers!

[@jochenweisel8612]

Thx

[@m111kca4]

Hey great video, if I do this can I still use 3 channel receivers aswell as 6 and 8?

[@RCMojoTV]

Yep, it works a treat with FS-GR3E, FS-R6B and FS-R9B

[@Ilikedahrice]

When you are checking the voltage, are you trying to calibrate the current-voltage or calibrate the lowest voltage the battery will do?

[@RCMojoTV]

Current voltage, the low voltage alarm is set in the global setup menu

[@trinitymirror]

Can I just ask? if the hack is done does it effect the way the menu worked from new, I have just about got the hang of the basic stuff. would hate to do the hack and find all the settings and menus had to be learned again for the steering and throttle. thanks

[@RCMojoTV]

The basic functions are a little different, the use of the back and end buttons are the main change, but once you start using it it'll make far more sense than FlySky's effort. The additional and advanced features can be a bit cryptic though, mainly due to limitation on what the LCD and display, as long as you have the firmware manual in front of you it's not too bad. A friend setup an 8 channel receiver with 8 servos to visualise what was happening and just went through all the functions to see what they did

[@Robnort001]

Hi not sure if you still monitor this upgrade but just in case, and in hope of some help, do you know if the Absima CR3P can be hacked with this firmware ?? I have been trying but stlink read comes up with checksum error ?? have you any ideas ??

[@RCMojoTV]

I believe it should work, as I understand it the Cr3P has the same basic internals as the GT3C just with a different physical layout. I can't find much info about a general checksum error, searching for things like "STM8 STLink checksum error"

[@jessefalb6767]

So can I use a channel to run a rc4wd winch with a wired controller? The controller says the radio must have a three position switch.

[@RCMojoTV]

I don't see why not, you can configure the rocker's to act like a 3 position switch in momentary mode. You would have to hold the switch to the left or right to run the winch in or out

[@powerROBY]

hello there is a way to put it in Italian ???

[@WHMustang13]

after the upgrade can i connect multiple rc models to it, like 1 crawler with a 6ch and 1 buggy/basher with a 3 channel reciever to it?

[@danmagri]

Yes.

[@RCMojoTV]

Yes, you end up with 79 model memories, which is quite a lot!

[@ferdykurniawan4420]

So if i use long pin header its ok not to solder it?

[@Renuars]

Probably a daft question, but how will one operate 8 channels as there are no extra buttons on the unit?

[@RCMojoTV]

Most of the buttons on the transmitter can be set to control any of the functions. For example the steering trim button can be used to control channel 4, you can set it to switch between one of 2 or 3 positions for a 2 or 3 speed gearbox. Or you can make it increment in small amounts to act a bit like a control knob. There are many other options too of course, and if you want access to the steering trim it’s a couple of clicks away with the scroll wheel

[@Renuars]

@@RCMojoTV thanks. Makes sense. I just happen to have a 3c unit.... Makes me wonder.

[@ramman347]

Is latency changed?

[@xKevmachinex]

running it with 2s 55c 7000mah inna truggy. I cant pull away slowly slightest tap of throttle and truck takes off spins tires. have to feather pulse throtlle very gently to take off from stop. i tried all the adjustments on controller cant figure it out. i am running a 5900 kv 32p 17t pinnion and 64t spur. maybe its to high gearing?

[@RCMojoTV]

To me that sounds like the ESC needs setting up. On a lot of ESCs you can calibrate them so they know the throttle ranges of the radio

[@xKevmachinex]

@@RCMojoTV oh ill have to look into it thx

[@foxxyytofficial]

@@xKevmachinex there is a channel on youtube that showed how to calibrate the channels on the hacked flysky firmware

[@leonardpascual8211]

where can I buy the usb and the cable for upgrading the firmware?

[@RCMojoTV]

eBay, Aliexpress, Banggood, they're available from all the usual suspects. Search for ST Link V2 and you'll see lots of them, they usually come with some socket to socket cable, you just need some 2.54mm pin header, again available from the above

[@leonardpascual8211]

@@RCMojoTV thanks a lot, more power on your videos, it's a great help for us.

[@mylittlercs8927]

Some one want tell me how to get past the system protected error abort reading and the same on programming

[@RCMojoTV]

I've not come across this myself, but here's a post on stack exchange that looks like it'll help: electronics.stackexchange.com/questions/128931/how-to-flash-protected-stm8-mcu

[@mylittlercs8927]

I tried this and my gt3b said it is protected how do I bypass that .

[@RCMojoTV]

have a look here and see if it helps: electronics.stackexchange.com/questions/128931/how-to-flash-protected-stm8-mcu

[@lipinghe40]

Awesome video and contents bro. Thank you and GOD bless.

[@fromfin90]

i bought my GT3C from china already modded :-) less hassle!

[@RCMojoTV]

You have to watch out with the pre modded ones. The ones with extra toggle switches and knobs use some additional electronics to give you the extra channels. You lose out on the channel mixing and advanced functions from the upgraded firmware

[@groomery1]

Error : Programming failed Error : Problem while trying to Reset swim and device. Apply a Power On Reset Error : < PROGRAM MEMORY programming failed.

[@RCMojoTV]

If the radio powers up and starts beeping when the programmer is connected you most likely have the SWIM and RST backwards. Double check the connections

[@groomery1]

@@RCMojoTV i have all the cables right ! If i turn on the radio i got nothing ! The old firmware is gone but the new one isnt there either?

[@VickyAndhika]

@@groomery1 have you found the solution? my GT3C start beeping when the usb connected, after successfully create program, data and option backup, the beeping sound stop. flasing firmware failed too. unplugged the usb, try to power on, the unit is dead. any solution for the error?

[@groomery1]

@@VickyAndhika Yes the dongle was deffective!

[@colossalbigfoot256]

So 3c or 3b? I e heard it both ways

[@PhiddyPford]

Colossal BigShot b comes with AA batteries, C is LIPO, biggest difference is the on off switch location. B can get bumped easily, C can’t. C for the win. I love my hacked B

[@RCMojoTV]

They both have their pros and cons, for the least fuss the GT3C is the best one to go for. However after hardware mods the GT3B can be modified to run on 4AA's which is really handy if you forget to charge them or there's an impromptu meet, you can just nip to the corner shop and buy some alkalines

[@kapzelo]

10/10