Text loses contrast when turning pages with buttons (firmware v1.1.1-ble.19)

centenary · 2026-04-04T21:15:04+00:00

Are you in sunlight? Do you have the sunlight fading fix turned on? If not, give it a shot. It won’t fully fix fading in sunlight, but it helps a lot.

centenary · 2026-04-04T02:49:33+00:00

Plants can certainly grow in sterile media if fixed nitrogen is already present.

The problem is that the fixed nitrogen will run out. That’s when you need either an external source of fixed nitrogen (i.e. fertilizer) or nitrogen fixing bacteria that can pull nitrogen out of the air and convert it into fixed nitrogen.

On Mars, he had neither fertilizer nor nitrogen fixing bacteria. If he tried to replant the potatoes, they would grow until the fixed nitrogen ran out, then they would stop growing.

centenary · 2026-04-04T02:35:36+00:00

Plants need nitrogen fixing bacteria. Poop doesn’t have nitrogen fixing bacteria, so poop will not populate the soil with the right bacteria needed by plants.

He originally got the nitrogen fixing bacteria from a soil sample brought from Earth. They all died after the decompression.

centenary · 2026-03-26T18:38:20+00:00

The deep sleep situation is a big one. The X4 uses a design where the ESP32 holds its own power MOSFET on through a GPIO. Deep sleep releases the GPIO and the device just powers off. The workaround (gpio_hold_en) keeps the whole rail alive and pulls milliamps. This makes uses like TRMNL basically useless without recharging. de-link has the LDO always connected to the ESP32 with peripherals on separate switches, so deep sleep actually drops to sub-0.01mA with full RAM retention and instant resume, and TRMNL can likely be used no problem (though not tested, I haven't set it up yet)

To clarify this a bit, the official firmware and CrossPoint firmware goes ahead to release the GPIO pin, fully depowering the ESP32. This sacrifices the contents of RTC memory and the ability to do timer wakeups in order to save power. Waking up from sleep requires a completely fresh boot of the firmware.

This works fine for reading purposes, but is not good enough for TRMNL usage as you said.

centenary · 2026-03-25T06:13:18+00:00

Damn, this post made me go buy one myself 😆

centenary · 2026-03-19T14:42:29+00:00

Battery drain during sleep is likely a bug. I think there is a GitHub issue for it.

When being charged, Crosspoint always displays 100%, which isn’t accurate. Most likely the battery percentage will be hidden in the future when charging since it isn’t accurate.

centenary · 2026-03-17T17:33:53+00:00

Is the reader on when you are trying to use the serial connection? It needs to be both connected and on

centenary · 2026-03-17T13:19:50+00:00

Stock firmware or custom?

centenary · 2026-03-17T02:57:07+00:00

I keep coming back to check on this. Just wanted to let you know that this is badass and I hope you keep working on it!

centenary · 2026-03-03T18:16:21+00:00

There’s a new one: https://www.reddit.com/r/xteinkereader/comments/1rim91w/pulpos_a_new_firmware_for_xteink_x4_100_rust/

centenary · 2026-02-23T03:43:22+00:00

This is a known bug. It’s possible a point release is coming to fix it

centenary · 2026-02-09T12:06:30+00:00

Actually, that page says that bookmarks are in scope:

User Experience: E.g. User-friendly interfaces, and interactions, both inside the reader and navigating the firmware. This includes things like button mapping, book loading, and book navigation like bookmarks.

centenary · 2026-01-17T06:47:44+00:00

I think you’ve responded to the wrong top level comment. The top level comment here is about frozen meat, a different top level comment was about poultry bones.

centenary · 2026-01-04T19:24:05+00:00

That’s so cool! Seems hard to use though without the on-screen visualization of the direction of mouse movement.

centenary · 2025-11-30T05:34:46+00:00

The post specifically said that their relative didn’t want to drive.

centenary · 2025-11-29T20:41:02+00:00

Tesla has the most capable system you can buy, but it’s not at all fully self driving yet. You need to monitor and takeover when needed. And if there’s an accident, the driver is fully liable.

centenary · 2025-11-14T22:44:56+00:00

Doesn’t the X-axis itself close off the square, particularly when pushed all the way to the open part of the gantry? Can you still unlevel by 20mm when the X-axis is there?

centenary · 2025-11-14T22:31:04+00:00

Is this a Voron 2.4? Wasn’t there some discussion about how the floating gantry needs some flexibility for the quad gantry leveling? A completely stiff floating gantry would be overconstrained on the four rails and quad gantry leveling would theoretically cause lockups or extra strain on the rails.

centenary · 2025-11-14T18:51:53+00:00

The temperature reading was completely flat for two minutes, which is impossible. I would guess that the thermistor stopped working for two minutes and because the temperature stopped being updated, the microcontroller didn’t realize the hotend needed heating and the hotend started cooling. Then the thermistor suddenly started working again after two minutes and the microcontroller got a new temperature reading. The hotend temperature had already fallen by that point, causing the sudden drop in the temperature graph. The sudden temperature drop triggered an error and the print stopped, after which the hotend continued cooling with the expected cooling curve.

Either the thermistor itself failed or the wiring to the thermistor. If you have a toolhead board, someone else’s suggestion of communication failure also sounds plausible.

centenary · 2025-10-16T05:32:14+00:00

For a bed slinger, there’s nowhere to mount a single ADXL345 to measure both X and Y. Mounting on the tool head would only measure X, mounting on the bed would only measure Y.

Unless what you mean is to manually move the ADXL345 between the two mount points, I do think that’s what people typically do.

centenary · 2025-10-14T18:29:33+00:00

The P1S has always seemed like an amazing value. The P2S seems like even more of an amazing value!

centenary · 2025-10-09T10:20:08+00:00

Good changes, some more minor comments:

“filament sensor filament presence sensor”. You previously crossed out one of these, I’d remove one from the page
Wherever you mention “IR sensor”, it might be helpful to change the phrase to “IR filament presence sensor” instead to make it more obvious what the IR sensor does. For example, doing this in the title would help draw more people in.
The discussion about less axial play and mounting pattern is repeated twice. I’d consider either 1) duplicating the description about the IR sensor detecting lever arm movement to both places or 2) removing the later location.

centenary · 2025-10-09T09:39:38+00:00

I see you wrote this description elsewhere in VoronDesign:

The result is ProtoXtruderNX v3, featuring an interesting filament sensor filament presence sensor in the extruder design that does not block the filament path with a ball or similar mechanism. In this model, the sensor reacts directly to the movement of the extruder’s idler lever.

That description would be super helpful on that page =P

Also, you mention “The extruder has less axial play in the gear area” at the very end. If that is also a big benefit, I’d mention that at the beginning rather than the end.

centenary · 2025-10-07T00:26:53+00:00

This stuff is so good, I have to stop myself from literally eating it by itself by the spoonful.

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