Hardware RCM Loader - not being detected on PC

PKM190 · 2026-06-23T02:57:45+0100

Because my NS Atmosphere injector battery is swelling I decided to get an RCM Loader off ebay as that is the only injector that seems to be available. Not too sure how to get it updated though. I used the provided USB cable and it does not show up as a USB device. Tried a few different USB cables including the one that came with the NS Atmosphere, and it does not show up.

Is there something I need to do to access it on PC so I can upload the latest build of Atmosphere fusee.bin on it? I press the + button but it does not make it detectable. When plugged it the light does turn red, and hitting the + button makes it blue as long as it is held down. But otherwise, I cannot figure out how to write new data to it.

cvskid · 2026-06-23T03:00:15+0100

From what i know of these newer rcm loaders do not connect to a pc. Instead they read a payload.bin from the root of your sd card instead.

worm28 · 2026-06-23T03:05:50+0100

There are two little holes on the bottom of your rcm loader one of them is a reset switch use a needle or a paperclip to reset it.

PKM190 · 2026-06-23T03:27:21+0100

cvskid said:
From what i know of these newer rcm loaders do not connect to a pc. Instead they read a payload.bin from the root of your sd card instead.

So I would download the fusee.bin from Github and place that on the root of the SD card, and then put the switch in RCM and inject it?

worm28 · 2026-06-23T03:29:27+0100

PKM190 said:
So I would download the fusee.bin from Github and place that on the root of the SD card, and then put the switch in RCM and inject it?

Rename fusee.bin or hekate.bin to payload.bin and place it on your sd card root.

Hayato213 · 2026-06-23T03:56:02+0100

You probably got the non updateable one, the original one is no longer available for purchase.

PKM190 · 2026-06-23T04:06:15+0100

Hayato213 said:
You probably got the non updateable one, the original one is no longer available for purchase.

Thanks, did this and though it does not seem to respond when placed into the Switch. Even after clicking the + button.

Edit: Tried it a bit more. Putting payload.bin (renamed from fuse.bin from Github) does not work on either decvice. Removing the file from the SD cart root works with the NS Atmosphere injector like usual.

Regardless of the payload.bin file's presence, the RCM Loader does not do anything. It just shows a blue light when plugged into the Switch.

thesjaakspoiler · 2026-06-23T06:33:51+0100

An RCM loader will not read anything from the SD card from the Switch.
That's bullocks. The RCM loader cannot access the SD card from the Switch.

For the newer RCM loaders, just connect it with the microUSB cable to your PC and it should show up as an USB drive.
The newer ones has this LED color which indicates which payload from which folder is selected.
So a blue led will inject the payload for Atmosphere.

Make sure the payload in that folder is the same version as your Hekate/Atmosphere version on your SD card.
Putting fusee.bin in the root will not work. The RCM loader looks for it inside the folders with the names below.

When connecting the RCM loader with the microUSB port, you will only need to press the button to update the firmware of the RCM loader itself.

PKM190 · 2026-06-23T08:16:16+0100

thesjaakspoiler said:
An RCM loader will not read anything from the SD card from the Switch.
That's bullocks. The RCM loader cannot access the SD card from the Switch.

For the newer RCM loaders, just connect it with the microUSB cable to your PC and it should show up as an USB drive.
The newer ones has this LED color which indicates which payload from which folder is selected.
So a blue led will inject the payload for Atmosphere.

Make sure the payload in that folder is the same version as your Hekate/Atmosphere version on your SD card.
Putting fusee.bin in the root will not work. The RCM loader looks for it inside the folders with the names below.

View attachment 579156

When connecting the RCM loader with the microUSB port, you will only need to press the button to update the firmware of the RCM loader itself.

Both the included USB cable and the one for the NS Atmosphere do not work, it is not detected in Windows. It does not show up in Disk Manager either. A light does come on when plugged in but that is it. Is there some button pressing sequence or software that must be used for it to show up in Windows?

Hardware RCM Loader - not being detected on PC

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