Hacking RELEASE AutoRCM Payload (briccmii) by rajkosto

[Trunks2304]

This is the last thing I can think of. Say you left your Switch at X battery percentage then you let it charge in RCM up to a Y percentage that you see once you immediately send Hekate. Now you use the Switch for some time and it goes down. Do you charge the Switch at all while it is on or do you do all of your charging in RCM?

Back when I was doing this i wouldn't really charge it during gameplay, just when I'd put it into sleep(when sleep didnt work) / turned off the wrong way into RCM when I was finished playing. Never did any battery cycling or had to disconnect my battery (considering i can't because my screws are stripped) and still no desync issues. Ive never heard of anyone complain about this issue for AutoRCM except for these couple cases

 

[Draxzelex]

Back when I was doing this i wouldn't really charge it during gameplay, just when I'd put it into sleep(when sleep didnt work) / turned off the wrong way into RCM when I was finished playing. Never did any battery cycling or had to disconnect my battery (considering i can't because my screws are stripped) and still no desync issues. Ive never heard of anyone complain about this issue for AutoRCM except for these couple cases

The thing is sleep mode battery charging still worked as intended because sleep mode in of itself wasn't broken but rather the console could not be woken out of sleep. So theoretically, if you did sufficient charging during this time, any battery de-sync issues could be masked with any charging done during RCM. That's just my guess. If you really want to see for yourself what the de-sync issue looks like, you can try the following (which is what another user did):

1. nstall AutoRCM and boot into Horizon, disconnecting the Switch from the computer.
2. Let the Switch battery get to 50% in Horizon.
3. Completely power off the system.
4. Plug in the Switch to a power source, which causes it to enter RCM.
5. Let it sit plugged in and in RCM all day.
6. Unplug the Switch from the power source and quickly load Horizon.
7. The battery is at 100%

 

[Beware]

So I'm getting some conflicting information.

Does the Switch charge in RCM mode?

What happens, for instance, when my Switch dies while in Lakka if I'm using AutoRCM?

 

[Draxzelex]

So I'm getting some conflicting information.

Does the Switch charge in RCM mode?

What happens, for instance, when my Switch dies while in Lakka if I'm using AutoRCM?

So, Switch charges and does not charges in RCM. xD

The results (battery was 89%):


The switch can charge normally the battery, if the BCT is intact!
In RCM AND in hekate menu.
*BCT is the boot configuration table that autoRCM corrupts.

Tests showed that it was charging with the same current, as in Horison OS.
The current it was drawing with 89% battery, was 800mA - 1000mA, using Switch wall adapter. On PC, it was the max the hub could give.


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The switch cannot charge normally with a corrupt BCT (AutoRCM).
In hekate, it shows similar behavior (read below).
Extra emphasis on the "normally".

With autoRCM, basically a corrupt BCT, the switch behaves differently.
There are 2 behaviors that I saw when connecting to the switch wall charger:

• Common - It was draining 140-250mA.
• Common (in hekate) - 200mA - 400mA
  
• Rare (normally if you connect charger after powering off from HOS) - Drain of alternating 250mA and 1000mA, with surges of 2.5A.

------------------------------------

Summary - facts:

1. Switch can charge completely normally in RCM or Hekate with a BCT intact
   • The percent % in Horizon OS, after a RCM charge, is not fake.
2. Switch does not charge normally with AutoRCM, a.k.a corrupt BCT.
   1. Either it charges very slowly or sometimes with a broken slow/fast/slow/fast charge pattern:
   2. Or this behavior is current taken from the USB controller or the BPMP (Nvidia's Boot and Power management processor)
   • In AutoRCM, the Charge IC probably can't update the battery calibration file and could make the percent fake.

I don't know for behavior .3 what really happens and what Switch does. This can be easily examined, by connecting a current multimeter between battery and switch and check the readings.

tl;dr Switch will charge in RCM without AutoRCM normally. Switch will charge in AutoRCM much slower. Lakka is now updated to prevent battery mismatches that led to the Switch turning off at around 30%.

 

[Beware]

tl;dr Switch will charge in RCM without AutoRCM normally. Switch will charge in AutoRCM much slower. Lakka is now updated to prevent battery mismatches that led to the Switch turning off at around 30%.

I know battery desync isn't an issue but there is still no battery indicator in Lakka, so sometimes the switch dies. What is the solution for someone whose battery dies and is using autoRCM?

 

[Lacius]

I know battery desync isn't an issue but there is still no battery indicator in Lakka, so sometimes the switch dies. What is the solution for someone whose battery dies and is using autoRCM?

If your Switch dies while AutoRCM is installed, you can plug it into your computer, and it will trickle-charge enough to enter RCM and load Hekate - CTCaer mod. From there, you can charge it. It's just not the healthiest thing for your battery to let it completely die. Just don't leave your Switch in RCM by mistake, and you're unlikely to have any problems.

 

[Beware]

If your Switch dies while AutoRCM is installed, you can plug it into your computer, and it will trickle-charge enough to enter RCM and load Hekate - CTCaer mod. From there, you can charge it.

So basically just charge it enough for it to boot into RCM then inject a payload? Could be worse I suppose...

 

[Hephaestus]

Is this (or the TX version of this) reversible?

 

[Draxzelex]

Is this (or the TX version of this) reversible?

Both are. They are uninstalled the same way they are installed (you would just press a different button)

 

[agas1957]

Both are. They are uninstalled the same way they are installed (you would just press a different button)

Is there any advantage of using briccmii over TX AutoRCM with SX OS?

 

[Draxzelex]

Is there any advantage of using briccmii over TX AutoRCM with SX OS?

Briccmii can display the number of fuses burnt as well as repair itself after a system update. In terms of functionality, they both boot the console into AutoRCM and can suffer from the same battery drainage issues. However, the solution to dealing with those issues are the same. Either power off from Hekate or the SX OS menu or perform a manual shutdown. Powering off from Horizon (within the Switch) may not actually turn off the console but instead boot it back into RCM.

 

[agas1957]

Briccmii can display the number of fuses burnt as well as repair itself after a system update. In terms of functionality, they both boot the console into AutoRCM and can suffer from the same battery drainage issues. However, the solution to dealing with those issues are the same. Either power off from Hekate or the SX OS menu or perform a manual shutdown. Powering off from Horizon (within the Switch) may not actually turn off the console but instead boot it back into RCM.

Thank you.
I am planning to update 3.0.1 -> 5.1 without burning fuses. And use SX OS. As far as I understand if I ever accidentally boot into Original firmware it will burn the fuses.
Did I understand it correctly that with AutoRCM there is 100% no way to boot without injecting SX OS payload. And injecting SX OS payload will save fuses even if I updated to 5.1?

 

[Draxzelex]

Thank you.
I am planning to update 3.0.1 -> 5.1 without burning fuses. And use SX OS. As far as I understand if I ever accidentally boot into Original firmware it will burn the fuses.
Did I understand it correctly that with AutoRCM there is 100% no way to boot without injecting SX OS payload. And injecting SX OS payload will save fuses even if I updated to 5.1?

Correct. As long as you are running SX OS V1.2 or higher, your fuses will not burn when combined with AutoRCM.

 

[jirobaye]

if after installed AutoRcm with sx os the switch not power on in any way i've bricked the console right?

 

[Draxzelex]

if after installed AutoRcm with sx os the switch not power on in any way i've bricked the console right?

That is what AutoRCM in fact does to your console! However, this brick can be used to our advantage because the console enters RCM if its bricked this way meaning it will not turn on unless a payload is sent to it.

 

[jirobaye]

That is what AutoRCM in fact does to your console! However, this brick can be used to our advantage because the console enters RCM if its bricked this way meaning it will not turn on unless a payload is sent to it.

so exactly what i need to do

 

[Draxzelex]

so exactly what i need to do

Have a USB cable or SX Pro Dongle handy when you want to use the console. When the console is on, you have 2 options:

1. Leave it in sleep mode and charge it there
2. Power off from Hekate/SX OS or perform a manual shutdown (hold power button for 12 seconds)

 

[jirobaye]

Have a USB cable or SX Pro Dongle handy when you want to use the console. When the console is on, you have 2 options:

1. Leave it in sleep mode and charge it there
2. Power off from Hekate/SX OS or perform a manual shutdown (hold power button for 12 seconds)

the problem is that i've plugged usb cable to pc and nothing happen, completely black screen

 

[Draxzelex]

the problem is that i've plugged usb cable to pc and nothing happen, completely black screen

Did you send a payload using a loader? Simply plugging it into a computer won't activate the console.

 

[jirobaye]

Did you send a payload using a loader? Simply plugging it into a computer won't activate the console.

sorry the problem was my bad usb port, didnt work it, now everything is ok, thanks for all.