Tutorial  Updated

Internal modchip - SAMD21 (Trinket M0, Gemma M0, ItsyBitsy M0 Express) Guide, Files & Support

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Please please accept my apologies if I haven`t replied to tags etc... I have no idea what is happening. I`m subscribed to this thread but I am not receiving notifications. Please inbox me if possible. Or tag me in another thread.

Its amazing that people are still checking all of this out. I thank you for all of the help and support I have received in this thread over this year.

Cheers. Matty.


A video showing a modchip in action. Thank you once again to @metaljay for providing this. This is what you can achieve by fitting a chip!



Section 1. Gather your software.

Get your chip software from THIS THREAD.
Follow the flashing instructions there...




Section 2. Removing USB port and unneeded LEDs. (Adafruit chips only)
  • Next, we need to remove the USB port from the modchip. I recommend a heatgun or a rework station. Heat up until the USB port just lifts off the modchip.
  • Do the same for the LED just to the right of the USB port.
See picture:
20181031_110415.jpg


You are now ready to fit your device. Proceed to Fitting section.





Section 3. Fitting modchip to your Switch.
New Universal Method. All SAMD-based internal chips. If your chip is not supported and you cannot work it out, PM me.

Trinket M0.
Solder as laid out in the following picture

trinketfinal.jpg

==================================================
Rebug SwitchME M0. Use Trinket files.
Solder as laid out in the following picture

rebugfinal.jpg

==================================================
RCMX86 - Internal modchip version.
Solder as laid out in the following picture

RCMX86-Internal-Final.jpg


==================================================
Gemma M0. Use Gemma files.
Solder as laid out in the following picture


gemma final.jpg

==================================================
ItsyBitsy M0 Express. Use ItsyBitsy files.
Solder as laid out in the following picture

itsybitsyfinal.jpg




==================================================
Feather M0 Express. Use Feather files.
Solder as laid out in the following picture

feather_final.jpg




BUILD YOUR OWN FROM A QFP ATSAMD21E18. Trinket equivalent pins.
Flash Trinket bootloader using OpenOCD via serial pins SWDIO / SWDCLK. Fit a reset switch somewhere... Or going to power / wake (aka method 2). If building for external use, it is good practice to fit a third capacitor between 3V & GND. This is deliberately vague and ambigious, as this needs research and you need to know what you are doing.

Link for setting the Pi up with OpenOCD: HERE
Raspberry Pi OpenOCD image in downloads section or HERE
SAMD pi connection.png



Alternative Solder Points

Credit to @consolex for original pic. I`ve added alternative points to solder to:
Alternatepoints.jpg


Credit to @pyorin for this much tidier version showing the same info as the above one!
Alternatepoints2.jpg

s-l1600.jpg

alternative3v.jpg




Replacement Parts List

Ok... So you have damaged your switch soldering your chip in. Not to worry.

First things first, DO NOT BRIDGE THE CONTACTS HOPING TO REVIVE YOUR SWITCH. With resistors, you may possibly get away with this, but with the capacitors listed below, if you jump these points, you will make a nice short-circuit to the PMIC and / or the M92T36, killing them instantly. Don`t do it.

OK... I`ll list these parts with METHOD 2 & 3 TRINKET PIN NUMBERS and the values of the components they solder to.

TRINKET 3V (POWER SUPPLY) - 2.2uF 0402 size MLCC capacitor. Voltage unimportant as long as it is over 6.3v
TRINKET PIN 2 (POWER ON RESET - goes to pin 5 on M92T36)- 4.7uF 0402 size MLCC capacitor. Voltage unimportant as long as it is over 6.3v
TRINKET PIN 0 (VOL+) - 150R (150 ohms) 0201 Thick Film resistor. 50mW
TRINKET RESET (SWITCH POWER BUTTON) - 150R (150 ohms) 0201 Thick Film resistor. 50mW


I recommend RS components.

FAQ

Q - How do I boot the switch into APX (RCM) mode?

A - You need to short out pin 10 on the right joycon rail to GND with a jig or modded joycon or paperclip (not recommended... Buy a jig you cheap-ass gyppo). Once shorted out, hold down vol+ and power. The switch screen should be off... Plug into your PC and it should recognise a APX device. Well done. You are in RCM.

Q - What glue should I use?
A - Only glue if necessary! Ideally if your soldering is of sufficient quality and your wire is thin enough, you don`t need glue. I use a bit because I am OCD. Anyway, use Epoxy. It`s what I use. Gives you some working time, is solid. Superglue makes a mess DO NOT USE SUPERGLUE. The only thing super about it is how it melts things. Epoxy won`t stick to the shield long-term, so bear that in mind. Pure Acetone will remove epoxy. Acetone tends to remove / melt anything to be warned. CHECK YOUR GLUE WON`T GO CONDUCTIVE OVER TIME - LOOKING AT YOU SCAMSUNG! The combination of heat cycles and absorbing of moisture can turn adhesive into a high-impedance connection!

Q - What size wire should I use?
A - I use AWG40 magnet wire or AWG30 Kynar. AWG40 goes onto components easier... And if you snap it, chances are the wire will snap and not the trace / component.
A2 - You can also use AWG30. I recommend Kynar wrapping wire but any will do. Looks nice, good resistance to elements, tidy. Nothing thicker than AWG30. You are just causing yourself more headaches. Trust me.

Q - Is AWG40 thick enough?
A - Yes. AWG40 is good for around 90mA.

Q - which methods do you recommend?
A - Connect all the straps...

Q - how do you recommend to set it up?
A - Fusee Suite. Search for Fusee Suite or go to link at top of this OP.

Q - My switch is flat and won't turn on.
A - Have you got the charger connected? Disconnect it or your switch won't boot! Boot to a payload (SX loader/Hekate), reconnect charger and leave on the payload menu and charge. Leave for 15 minutes and switch will start normally. It will continue charging one booted.

Disclaimer:
You have only yourself to blame. This voids warranty. This may or may not get you banned from online services. If it does, you got yourself banned. I`m not responsible if you kill your switch / your first-born with any of this in this post. I`m not infalliable. I`m partly senile. Do your own research. Kids, get bill payers permission before you attempt even using a screwdriver.
NUTSHELL: Don`t come having a go at me because you fooked your £300 console up. I`ll do my best to help you though if you do, Just don`t blame me.

Credits to Quantum-Cross, Atlas44, @Ninoh-FOX , @jcrorxp , @tecfreak, @mooglazer, @subcon959, @64Dp128k, @mikeleuskaldunak, @M-O-B, CTCaer, @evilsperm, @consolex and everyone else for valuable input.


IF YOU REQUIRE SUPPORT, IF YOUR CONSOLE ISN`T WORKING CORRECTLY... PLEASE POST A HIGH RESOLUTION PICTURE OF YOUR INSTALL. You might think it isn`t your soldering, but in all cases with the new methods, it is bad soldering. So, please post a picture.


A BRIEF WARNING - PLEASE READ
THIS MOD IS NOT FOR THE FEINT OF HEART. WE ARE SOLDERING TO TRACES AND COMPONENTS ON THE FRONT SIDE OF THE BOARD TO SAVE HAVING TO REMOVE THE BOARD AND SOLDER TO TESTPOINTS. IF YOU ARE STRUGGLING, OR THINK YOU ARE GOING TO STRUGGLE, PLEASE PLEASE SOLDER TO THE TEST POINTS NOTED IN THIS AND OTHER THREADS (YOU WILL NEED TO REMOVE THE MOTHERBOARD). DOUBLE - TRIPLE CHECK EVERYTHING. YOU HAVE BEEN WARNED!!!
Good soldering skills are needed!
A magnifying glass is needed!
Good soldering iron needed - ideally with a 0.3 conical tip. No more than 30w!
SECURE YOUR WIRES PRIOR TO SOLDERING. Stick them down with double-sided tape.
Only use glue if you need to and glue wires after soldering. Don`t glue the solder to the component!
Put the tiniest amount of glue on the PCB mask only. Never on components. Use a cocktail stick for more glue control!!!
Take a look at alternative solder points to get you out of the sh*t if you do rip something off the board
If you aren`t the best at soldering, then think very carefully about connecting to pin 6 capacitor (the one in these new methods). If you rip this pad, you WILL NEED TO REMOVE YOUR BOARD and run from a testpoint.
 

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NeoLTK

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Hi, Thank very much you for this work

I have a problem when the console is started, every 2 seconds the joycon disconnects and reconnects
I was able to observe on the chip (Trinket M0) when this happens LED 13 lights up and then goes off

if i disconnect strap joycon, this corrects the problem

Otherwise everything works

* I'm use switchboot joycon strap with simple UF2
 

mattytrog

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Hi, Thank very much you for this work

I have a problem when the console is started, every 2 seconds the joycon disconnects and reconnects
I was able to observe on the chip (Trinket M0) when this happens LED 13 lights up and then goes off

if i disconnect strap joycon, this corrects the problem

Otherwise everything works

* I'm use switchboot joycon strap with simple UF2
Poorly soldered GND connection is chief suspect.

Reflash both files... Leave plugged in for a couple of seconds after flashing. Try again.
 
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B3nnyb0y1990

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Hi all. Love the work but I actually made a profile just to find out what's wrong. I have a trinket m0 and have done the volume up and joycon mod. It's gone really well and it works but only problem is now that my battery is draining so fast. It's gone from 73 to 66 in the times it's taken to write this. Hopefully someone can help. I've checked my soldering and can't see anything wrong. Been using my trinket since it first started but decided to update how it's all done and kind of regretting it now.
 

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Hi all. Love the work but I actually made a profile just to find out what's wrong. I have a trinket m0 and have done the volume up and joycon mod. It's gone really well and it works but only problem is now that my battery is draining so fast. It's gone from 73 to 66 in the times it's taken to write this. Hopefully someone can help. I've checked my soldering and can't see anything wrong. Been using my trinket since it first started but decided to update how it's all done and kind of regretting it now.
Your battery is draining? It shouldn't be. Want to pay spice of your install? Have you connected the usb strap or have you not bothered?
 

B3nnyb0y1990

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The one closest to the battery
Just noticed that now that It seems to be that when I unplug the battery and plug it back in my switch instantly says it's 100% then just keeps going down? I am now using the other point closest to the joycon rail and it's the same. Also using the usb strap hasn't changed anything. Might just let it run down and see if it stops?
 

mattytrog

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Just noticed that now that It seems to be that when I unplug the battery and plug it back in my switch instantly says it's 100% then just keeps going down? I am now using the other point closest to the joycon rail and it's the same. Also using the usb strap hasn't changed anything. Might just let it run down and see if it stops?
Your BQ24193 or battery is damaged sir.

The trinket wouldn`t cause that problem unless you had maybe accidentally linked the capacitors on M92T36
 

B3nnyb0y1990

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Your BQ24193 or battery is damaged sir.

The trinket wouldn`t cause that problem unless you had maybe accidentally linked the capacitors on M92T36
My battery is new. Are the capacitors the one you have in the diagram? The 2 that are really close by the battery that's used for power? If so then I'll check tomorrow and what would be the best way to remove the solder from such a small area?
 

mattytrog

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My battery is new. Are the capacitors the one you have in the diagram? The 2 that are really close by the battery that's used for power? If so then I'll check tomorrow and what would be the best way to remove the solder from such a small area?
Could be that.

But there is certainly nothing in the method to drain the battery like that.

Best thing to do is take some good high-res pictures of your board with the install and let me take a look :)
 

B3nnyb0y1990

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Could be that.

But there is certainly nothing in the method to drain the battery like that.

Best thing to do is take some good high-res pictures of your board with the install and let me take a look :)
Well I woke up this morning and it had gone from 45 to 32. I've been at work for ages and it's now on 30 and I've used my switch and it's still on 30. Seems to have settled down now. That was really strange but it isn't draining anymore. Never had that happen before. Seems like when I remove the battery and put it back in my switch instantly says 100% then slowly trickles down to the correct amount. Thanks for the advice. Been following the switch hacking scene since day one and modded my switch with a trinket as soon as this guide started.
 

metaljay

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@mattytrog any ideas what the tiny capacitor directly below the new USB line is? I am not entirely sure but i think ive removed one side of the solder

it charges when i plug USB C cable in but its become a right pain to get the switchme into boot loader

IMG-0949.jpg
 
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mattytrog

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@mattytrog any ideas what the tiny capacitor directly below the new USB line is? I am not entirely sure but i think ive removed one side of the solder

it charges when i plug USB C cable in but its become a right pain to get the switchme into boot loader

IMG-0949.jpg
Shouldn't affect it Jord.

What sort of delay are you leaving between presses? You are leaving usb disconnected until you are in bootloader mode?
 
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