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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  • Trinket equivalent.png
    Trinket equivalent.png
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MeisterPilaf

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Not method 2. At least not for now.

Method 1 if you don`t mind autoRCM, or have modded joycons to enter RCM
Method 3 if you don`t want autoRCM.

@linuxares

Something like this?
View attachment 147540

Thanks for your response.

can you tell me what's wrong with method 2?

can you tell me what the downside of autorcm is?
 
Last edited by MeisterPilaf,

johnd0e

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Using the method 1 and routing the cables, when I pulled from the cable connected to Lines Pad (yellow) the pad get removed. What would be the best way of soldering that point?. Trying to repair the pad I see it quite complex, Is there any other soldering point to connect to?.
Regards,
 

mattytrog

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Using the method 1 and routing the cables, when I pulled from the cable connected to Lines Pad (yellow) the pad get removed. What would be the best way of soldering that point?. Trying to repair the pad I see it quite complex, Is there any other soldering point to connect to?.
Regards,
Unfortunately, the point goes to one of the sub layers on the board. So you need to solder to the usb-c connector. Then you need to go to the filter just above it.

Another one to the list? Send it my way if you like for a fix
 

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mattytrog, thanks for your feedback.
Which point of the usb-c connector? what you mean to go to the filter above it? Could you point them in a photo?...
Would it be easier trying to repair the pad then?
 

mattytrog

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mattytrog, thanks for your feedback.
Which point of the usb-c connector? what you mean to go to the filter above it? Could you point them in a photo?...
Would it be easier trying to repair the pad then?
Will post a picture in next half hour
 

mattytrog

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usb-alternate.jpg
Solder to here... If you are struggling, then there are two further USB2 points on the bottom of board. Means board out if you can`t do this...
 

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Thank you very much for your valuable support.
Why do I choose a pair of points? As I lost the pad associated to Lines point for Method 1, Could solder only to the point signaled by yellow arrow in your photo?. I know, probably dummy question, but initially I thought I have to solder the point arrowed in blue "imagining" a straight line to my missing pad.

upload_2018-10-25_22-14-56.png
 

mattytrog

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Yes. If you have only lost the one, then do the one! Your red line going to your (now missing) testpoint, put to where I have placed the BLACK ARROW with the blue trace of the back of the USB-C connector.

--------------------- MERGED ---------------------------

Follow this...
usb_edited.jpg
 

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So I can choose point 1 or 2 indistinctly to substitute my missing pad soldering point?. With my "firm hand", point 1 is already a big challenge... point 2 is impossible
upload_2018-10-25_22-37-13.png
 

mattytrog

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So I can choose point 1 or 2 indistinctly to substitute my missing pad soldering point?. With my "firm hand", point 1 is already a big challenge... point 2 is impossible
View attachment 147597

You have marked the USB-C connector as 2... This needs to go to ONE of the points I shown. Doesn`t matter which...

No getting around it, you MUST solder to the USB-C

--------------------- MERGED ---------------------------

usb_edited.jpg
 

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Thank for you patience with this poor guy :)... but my confusion increases... Is it enough with susbtitue soldering to my missing right pad to the point 2 in the back of the USB-C... or do I need to do anything else with your blue links in the diagrams? you suggest that "You have marked the USB-C connector as 2... This needs to go to ONE of the points I shown", but does that mean that i need to link both points, point 2 (usb) and one of the two options connected in blue, with a cable?
 

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Thank for you patience with this poor guy :)... but my confusion increases... Is it enough with susbtitue soldering to my missing right pad to the point 2 in the back of the USB-C... or do I need to do anything else with your blue links in the diagrams? you suggest that "You have marked the USB-C connector as 2... This needs to go to ONE of the points I shown", but does that mean that i need to link both points, point 2 (usb) and one of the two options connected in blue, with a cable?

Yes. You need some wire to link the back of the USB-C to one of the points I mentioned.
 

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And the solder point for the rebug chip link, has to be one of the back USB-C also?. Because if solder 1 cable to these tiny points is difficult, soldering two cable to the same point I suppose would be too much for my poor skills...
 

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And the solder point for the rebug chip link, has to be one of the back USB-C also?. Because if solder 1 cable to these tiny points is difficult, soldering two cable to the same point I suppose would be too much for my poor skills...
I'm afraid that's what needs to be done. If you think you will struggle, send it to somebody. Somebody on here will mend your trace and fit your chip.

Like I say you can send to me if you wish
 

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Thank you for your offer... but I'm obstinate, I break it and I fix it... or break it again :D
In the worst case If I couldn't get it, I suppose that the missing pad doesn't doesn't affect in anything to the correct behaviour of the usb port for normal operation, isn't it?
 

mattytrog

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Thank you for your offer... but I'm obstinate, I break it and I fix it... or break it again :D
In the worst case If I couldn't get it, I suppose that the missing pad doesn't doesn't affect in anything to the correct behaviour of the usb port for normal operation, isn't it?
With that pad broken and unrepaired, your usb port will not work correctly, unfortunately. You will notice this when you dock it
 

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Time to get my hands dirty now... and the smallest welder tip possible.
Thank you again for your time and support. I'll keep you posted.
 

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So matty offered to fix my switch after I botched the install..

It came back in today and I just want to say, he's the real deal, he is as good as everyone says he is and you can absolutlely trust him 100% for anything about switch mods
 

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