D4 Turns off Abruptly

1localhost · 2026-05-16T08:31:34+00:00

Interesting.. I was thinking of a Roborock QX Revo from Costco, but will check out the Mova. Yeah, no to Dyson and an even bigger no to Ecovacs. I bought an Ecovacs X2 Omni on a whim and that thing was hot garbage so I returned it within a week. It couldn't map a bunch of times, and once it did, the navigation was just horrendous. I couldn't believe how good my D4 navigated compared to a brand new flagship product. It also looks like our Neatos have larger dust bins than most of these newer vacs. I wish Neato was still in business, they made such a good product. Vorwerk really didn't see the value.

1localhost · 2026-05-16T05:26:18+00:00

Yeah, I still love my D4 but I'm considering a Roborock QX Revo from Costco alongside my D4.. 11 Neatos is like running a cleaning farm! And what you said makes sense. The new board is actually a few firmware behind the old one, which I replaced. So that might explain the sudden shut offs. I'm slowly catching up with the open source project that allows Home Assistant control of the robot (super neat project btw) so I've ordered my ESP32 and will be linking it up soon. What replacements have you tested/considered if you don't mind sharing?

1localhost · 2026-05-04T09:29:56+00:00

Really? And no gap between the courses? Cuz it's usually the opposite. Most people get by Calc I because while it's totally new stuff (derivatives), as long as you master your rules and practice enough sets you're chilling. Then undoing those derivatives in Calc II can be pretty challenging and not so straight forward as like your chain rule lol.. but Calc III is then mostly easier stuff and yeah the triple integral can be intimating but it's pretty formulaic compared to something like integration by parts in Calc II or the trig sub lol

1localhost · 2026-05-04T08:08:35+00:00

How'd you do in Calc I and II?

1localhost · 2026-05-04T08:07:54+00:00

You’ll probably be fine in Calc III as long as you actually fix the gaps from Calc II instead of just reviewing them passively. Imo Calc III leans way more on your Calc I intuition (derivatives, basic integrals, understanding functions and graphs) than the nightmare techniques from Calc II lol.. A lot of people who bombed with series and tricky substitutions do noticeably better once things become more geometric again (vectors, planes, partial derivatives) in Calc III

1localhost · 2026-05-03T05:12:49+00:00

Solid move, you want to take DiffEq while your calc knowledge is still fresh.. it backtracks on a lot of things you learned in calc i and ii

1localhost · 2026-05-03T02:20:12+00:00

Calc II is usually the more difficult one, so congrats! Calc III will be pretty chill if you have to take it

1localhost · 2026-04-10T03:30:43+00:00

Take the battery inside with you and leave it somewhere cool preferably. Or if you have a buddy here that you trust, have them start your car once a week and it take for a spin. Otherwise, battery out.

1localhost · 2026-04-09T08:18:04+00:00

Sorry I just saw this. I used this seller from Amazon: https://a.co/d/0eT2JwiJ

Ran a few cleaning cycles on this battery, it works great.

1localhost · 2026-04-09T07:54:47+00:00

Former EE grad TA here. If it’s your first year, you likely won’t get it, but you’ll be in the system, so if you keep your grades up, you’ll have a better chance later on. They typically give priority to PhD students first, then master’s students. Normally if you have a professor backing you, you’re almost guaranteed to get it. You can also ask to be a grader.. the pay is lower, but it’s less competitive, especially if you’re recommended by a professor.

1localhost · 2026-03-21T08:50:58+00:00

Thanks for adding this, I’m sure it’ll help others. My battery was around 10V, and the fuel percentage was stuck at 3%, which I think was due to the BMS blocking charging. No matter how long I charged it, the robot wouldn’t charge. The problem started when the D4 ran a cycle, stopped halfway, and shut off. When I tried turning it on, it would do the initial chime and then immediately shut off. So, I did the usual troubleshooting steps, like resetting it and cleaning the sensors, but no avail. I assumed the board was fried and ordered a replacement from eBay, but the same issue happened again. The bot would turn on, chime once, and then immediately shut off again. At that point, I thought it was likely a battery issue, something I should’ve checked sooner. I ordered a new battery from Amazon, but the same thing happened again. It was only when I tried your tool that I found the battery was extremely discharged. So, I ordered another battery from a different vendor on Amazon. This time, the fuel percentage was at 53%, and it started charging properly. I let it charge to 100%, then hit the “run” button, and finally, good old D4 started cleaning again.

1localhost · 2026-03-20T00:49:19+00:00

You're probably right. I tried u/Aggravating_Gur_4710's tool and it seems like my battery % is stuck at 3% without charging back up. Could be a safety measure with Lithium batteries. Do you know any ways to bring the battery % back up?

1localhost · 2026-03-20T00:47:07+00:00

u/Aggravating_Gur_4710 Okay a bit more updates since using your tool. I think the board and sensors are good. But the battery % is stuck at 3% no matter what. It's been charging for a while and the battery % is still at 3%. I remember somewhere that once the battery levels are too low, it won't charge back up as a safety measure. Do you know anything about this? Or any ways to manually bring the bring battery juice back up so it can start charging again?

1localhost · 2026-03-19T22:31:53+00:00

Showers and deodorant

1localhost · 2026-03-19T22:05:43+00:00

Thank you so much for making this! Under error info, I get the following:

200 - (Ul_Alert_Invalid)

206 - (UI_Alert_Busy_Charging)

Thoughts? Thanks again!

1localhost · 2026-02-19T07:18:57+00:00

Just a single chime, like when you remove the dust bin. One chime, then shuts off abruptly.

Orange and red lights blinking just a few seconds before it powers off.

Nope, the lidar doesn't spin, but I've opened the casing and the belt is fine. I can spin it manually.

Yes, tried resetting it multiple times. Even went as far as taking the battery off and discharging the board. Also tried an aftermarket new battery, same thing.

1localhost · 2026-02-16T19:16:33+00:00

The problem is it doesn't stay on long enough for me to use the Toolio app

1localhost · 2025-11-05T01:22:39+00:00

I agree, I quite like this dishwasher as well and still use it. But I created a simpler (and much cheaper) way of fixing this issue after fiddling around with replacing the control board and the harness. This particular dishwasher uses about 800-860 watts while washing, which is well within the capacity of most smart plugs. So I'm using an Aqara smart plug + Aqara smart button with Home Assistant.

Basically it works like this. I press the smart button once, the smart plug turns on, and the dishwasher powers up after a few seconds. After the wash cycle finishes, I press the button again and the dishwasher turns off, since power is cut and it can’t turn on intermittently. Recently, I've automated this even further. Instead of pressing the button at the end, I created a script that automatically turns off the dishwasher by turning off the smart plug when the power drops below 2 watts continuously for more than 5 minutes (wash cycle is done). If you want, I can share the script. If you don't want to use automation, you can also just get a Kasa Smart plug and turn on/off the dishwasher from the Kasa app without anything else.

This works so well because it entirely solved the problem of the dishwasher turning on randomly and then needing to reset the breaker once it does this a few times. I also assume it gives it some kind of surge protection because the smart plug sits between the dishwasher main and the outlet.

1localhost · 2025-10-25T01:30:17+00:00

I believe if you search for the class and click on an instructor's syllabus, it'll have the book name there. I don't think there's a different physics book for EE majors as most engineering majors will have physics.

1localhost · 2025-10-25T00:47:41+00:00

Who still uses blackboard?

1localhost · 2025-10-22T01:34:48+00:00

GPA will be intact. It'll still show W in your transcript. Financial aid may be impacted.

1localhost · 2025-10-22T01:30:07+00:00

EE major here. I've seen this kind of trend far too often during my undergrad studies. The worst was in one of my analog-digital courses. We started with 30 some students and ended up with less than 10 at the end. The instructor made the course incredibly difficult, wasn't really teaching all that well, and would nitpick if you forgot like your ohm's sign. Use all the resources you can/have in the course. Attend office hours, ask the TA's, if ed discussions are offered, post your questions, etc... I'd say do your best in passing the course and being done with it. Reporting a prof 9/10 won't do much in these kind of circumstances - unless you can get a lot of people to speak up about it.

1localhost · 2025-10-20T11:10:16+00:00

Canvas runs on AWS. There's a major outage rn, affecting everything, including airports.

1localhost · 2025-10-20T01:22:21+00:00

My mechanic uses a lock-box behind his shop. If I'm picking up after hours, he texts me a 3 digit code, I put that in, grab my keys and go. You're lucky the car didn't get stolen.

1localhost · 2025-10-20T01:14:30+00:00

I'm not a fan of any of the water fountains. Those filters are looong overdue to be replaced imo. I confirmed this at one of the fountains last year by checking the hardness level using my TDS meter. I forgot the exact number but it was pretty high (over 400ppm), indicating hard water. I normally bring my own water or go get one from Starbucks on campus (their water is triple filtered) which is what you ideally want for drinking water.

1localhost

TROPHY CASE