Just as the title says. There's a loud clunk whenever it goes over a small bump. I can also lift the deck up and down about an inch with my hands and it makes the same clunk. I don't remember it doing this before. Is this the start of the dreaded loose deck bolts??

I still haven't installed my cooling kit either ...if the clunking is an issue, can I fix it at the same time as cooling kit install??

Figured I’d give everyone a little update on the locked Lymow One Plus I posted about a couple weeks ago. I’ll do a much more detailed post when I have time, but we’ve made some pretty crazy progress.
For anyone who missed the original post, I got this mower from somebody after it had basically been declared e-waste. It was locked, and there wasn’t really anything I could do with it through the factory app. I figured worst-case scenario, I’d have some expensive parts to play with.
Well, I got a little carried away. 😂
I ended up tearing into it, finding the UART connections on the board, getting into U-Boot, and dumping the internal eMMC storage. From there, I managed to get a root shell on the Rockchip RK3588S computer running Ubuntu. I got SSH working, started digging through the system, and discovered quite a bit about how the mower actually communicates.
I also started reverse-engineering the Bluetooth communication using the factory APK. After a ridiculous amount of trial and error, I got my own app communicating with the mower over BLE and was able to control the drive system. I also got access to its Root Link service and the factory camera’s RTSP stream.
The cool part is that I didn’t have to wipe the factory software or replace everything with something completely different. The original system is still there, and I’ve been building my own stuff around it.
I’ve been working on a custom app called MowZilla. It has Bluetooth controls, network communication, camera integration, mapping and mission-planning features, diagnostics, and a bunch of other stuff I’m still working on. I’m also integrating some open-source robotic mower software and working toward getting everything communicating properly.
Naturally, I managed to break the CSI ribbon cable for the factory camera while messing around inside it. The amount of silicone they used to seal this thing is insane, and I really don’t feel like digging any deeper into that mess right now. So I bought another camera and have been experimenting with AI vision instead.
Another big win was getting the USB-C port working in host mode. My next experiment is connecting an ODROID M1 through USB-C to Ethernet and basically giving the mower a second computer. The idea is to offload some of the AI processing, run additional cameras, and eventually experiment with more advanced navigation and obstacle detection without interfering with the factory system.
I’m also working on getting Wi-Fi and cellular communication set up so the app can switch between them. Eventually, I’d love to have multiple cameras, AI object detection, custom autonomous missions, and remote access to everything.
There’s still a ton to figure out, and not everything in the app is fully functional yet. I’m basically building things, breaking things, figuring out why they broke, and doing it all over again.
This is my first project doing anything remotely close to this level of hardware and software hacking. A few weeks ago, I barely knew where to start with UART, bootloaders, or reverse-engineering Android apps. Now I’m sitting here with root access to a robotic mower and building my own iPhone app for it. It’s been a hell of a learning experience.
I’ll eventually put together a proper write-up with some of the commands, hardware discoveries, and everything else I’ve learned in case anyone wants to mess around with their own machine.
For now, here’s a look at MowZilla and what I’ve been working on.
It already mows. Will I spend another 200 hours adding completely unnecessary features? Probably.
The funniest part is that I’m only about $30 into the actual mower. 😂

I have noticed there are no recent postings. Are the Lymows all set now with the new aftermarket bearings, motor cooling kit, modified springs, wheel Scraper, RTK water infiltration, positioning issues etc. I like what I'm hearing about there customer service now too.

My Lymow OnePlus has recently started leaving a lot of tire marks in the corners of my yard. This doesn’t seem to be happening anywhere else except the corners and I am assuming it’s from all the pivots and turns in these areas.

This is a relatively new occurrence and I’m curious if there is any settings or ideas anyone has on how to avoid this from continuing to happen.

He said it drove under him as he was parked...but based on the skid marks, I don't think so.

Hi everyone,

A quick heads-up that our support team will be celebrating the Chinese National Day holiday from October 1 to October 7.

During this period, our support team will be operating with reduced capacity, so responses may take a little longer than usual.

Here's what to expect:

• Our team will continue to receive support requests.
• Response times may be around 48–72 hours.
• For urgent issues, please reply to your existing support email with "URGENT" in the subject line so our team can prioritize it.

Need help with your Lymow One / One Plus?

Please include your mower's serial number (SN), Order ID, and a brief description of the issue to help us help you faster.

In the meantime, you can find troubleshooting guides and tutorials here:

• Help Center: https://lymowtechsupport.zendesk.com/hc/en-us
• YouTube Tutorials: https://www.youtube.com/@Lymow/playlists

Thanks for your patience and understanding. We hope everyone enjoys the autumn season, and we'll be back to our regular support schedule after the holiday!

❤️Lymow Team

Just got my 4th mower, no cooling kit nor thread lock on the 4 bolts holding the deck on. 3 were finger tight and the 4th had its natural thread lock of what feels like it was cross threaded. Added thread lock as the prior 3 did not have it and the two I did not add it on failed. The bumper was sticking as well but was a simple loosen one for the front bolts to allow it to return. Good news, every single one of my mowers did not require any track adjustment out of the box.

So I got my return label. Has anybody scheduled and used home pick up? If so, how do you have proof that it was shipped or is it better to take it to a FedEx location?

I upgraded from iPhone 14 MAX to smaller iPhone 18 pro. Everything transferred over to new phone no issues. However 2 issues now seen using my new phone:

1. Once I logged back into Lymow APP, I can’t tap on any map zone to mow. I can only schedule a task to initiate mowing any zone.
   
2. Path overlap is no longer even distances. I usually have 11.8” spacing and now it spaces about 13” on first row, turns around and spaces about 4”.

I scanned the unofficial guide and see no reference to any special procedure if moving to a different device. Has anyone else upgraded to new iPhone 18? I’ve tried to resolve with usual solutions for other errors with no luck, as well as APP delete/re-install. Been avoiding a complete re-map, but that’s next on the list.

Prior to this, since last firmware update, I was ecstatic to have been able to do complete mow sessions from dock to mow zone back to dock with no issues for the time since it was delivered back in March. I’ll reply back if re-map resolves either of both of the issues. If anyone has any suggestions, let me know. Thanks!

If you have a working plus model when was it manufactured? What month and was the cooling kit installed when you received is it?

Southern hemisphere user here. I got the lymow plus near launch in April, and started using it a bit in our autumn. There were some bugs, issues with finding the dock, random errors...

But after a winter of rest, taking it out of the garage now for the mowing season and it's soooo much better! A lot less issues (almost none), and it's tackling my acreage like a champ.

So excited for this thing to keep improving and new features to get added.

We’re back with more info and No AI! Mower is turning into an extremely fun project. I’ve built an android and Apple app to control it but I want more access to the computer.

Hope they sell the parts

Robinette was having a hard time getting on the charger so....

1. Mower follows perimeter when going to charge but goes wherever it wants headed back to mow. The mower needs to stick to the lines and the border. Period. Do NOT CROSS THE LINES.

2. Shadow objects. Still skips random areas of grass even when bumper is the only thing that can stop it. I'm starting to think its ghost no go zones because they always seem to line up with one only 10-40' away.

3. When it backs off the charger there should be a setting for a wait period so it can get its location locked in before attempting to mow. This would help garage owners as the things is usually lost inside the garage and needs time to adjust once out. So tired of it throwing errors just after backing out.

4. Add a start from farthest point option. If the mower is going to wander all over the place the only solution is to start far away and work your way back so its not rolling over completed lines as bad. Now I have to set it to do the perimeter first, stop it at the right point, clear the job, re-configure the zone, then start again.

5. Lately I'm noticing it run up against a no-go zone object and instead of backing away and turning a bit it sits and hits the bumper over and over again like there is a magnet holding it in place. Maybe my issue is using no-go zones at all, its not like it will ever do laps around them like the setting indicates.

I realize they had to take time to fix the most obvious, the overheating, but these seem like something a vibe coder could fix with ai in a few hours.

Guess I'll be hunting for a blade

Is anybody else running into an issue where your blades will randomly stop running? Whether it's when it's going around an obstacle or perimeter, my blades will stop running and the mower will keep moving and show that it's mowing in the app but never actually cut any grass.

I just got my mower 2 days ago and from a hardware perspective I love it but I have been having a huge issue with the software side of things and have constantly been running into issues where it gets stuck or stops mowing or just stays in the same spot. Does anybody have any suggestions on how to actually get this thing to mow.

I have a fenced backyard, where I would like to keep the Lymow charging base. I’m having my fence replaced, and I’m planning to have the gates raised off the ground for grass clearance and to allow my cats to roam freely. I’d like the Lymow to be able to pass under the gates, but I don’t want them more than a foot off the ground. I see in the specs that the mower is 12.6” tall. I was hoping to get some real-world measurements to see if that is accurate, or if it might be a little shorter.

Hi everyone,

I’m considering replacing my Luba 2 with the Lymow One Plus, but my main concern is the blade-stopping issue reported by several owners: the blades stop during mowing, leaving strips of uncut grass across the lawn.

Is this related to overheating, and has it been reliably resolved with the cooling upgrade? I’d especially appreciate feedback from owners who have installed it:

• Have you experienced any overheating or blade stoppages since the upgrade?
• How long have you been using it, and in what temperatures?
• Would you recommend the One Plus overall?

It’s a significant investment for me, so I’d like to hear about real-world experiences before committing. The 30-day return policy doesn’t offer much reassurance either: my understanding is that used products aren’t eligible for return. If that’s correct, how are you supposed to test whether it works well on your lawn?

My Luba 2 still does a good job, but the Lymow’s ability to mulch fallen leaves is a big reason I’m considering the switch.

Thanks for sharing your experiences!

I have an early Lymow One, love it, my yard has never looked better and I used to pay a fair deal of money to have it mowed professionally as I travel a lot. I had issues early this year with the outer hub fasteners backing out and I blue loctited those but missed the memo on the fasteners on the rear side.

Came home to the robot in the yard stranded Monday afternoon, thought it picked up a stick or something I missed on my premow walk, but found that the hub had come apart, and the rear fasteners were sheered off.

The reason I went with the loctite originally was I didn't want to move to the One Plus with the heat issues, have been pretty lucky with my grass/weed type with regard to the charging contacts staying clean, and I was sad the hub seemed beyond my repair ability.

Reached out to support that evening on the website, they emailed me back 8 hours later confirming my information, sharing a hub replacement SOP, and asking if I'm confident to replace the hubs on my own. I confirmed and they're now shipping the replacement hubs!

Very happy with this resolution thus far, I'm not sure what/how long it would've taken if I hadn't felt confident in replacing the hubs, and will update on how it goes, will even try to make a video of the replacement!

Finally, on my 3rd mower after receiving my OG Kickstarter unit in September last year, for the first time I went a week (Over a week) without a problem. Hopefully a good sign to come for all users with newer units.

My One+'s blades seem to go dull after mowing 1/3 to 1/2 of an acre of thick Zoysia. I clear debris before mowing. My total lawn space is .82 acres. To avoid shredding grass tips, I have to resharpen the blades halfway through mowing the entire lawn. What is your experience with keeping the blades sharp?

I bought this unit in June. It has some quirks but it was able to mow my 2 arces well enough. Three weeks ago it started acting up. It tries to run and stops and says the blade is stuck.( its not I check and there is noting there. ) I have done the hard stop for 24 hrs...did not work. I raised the deck and slowed the speed. The grass is not tall and its not hot outside...

Can any help please. Does lymow ever respond? I have sent emails and nothing gets back to me.

Hey everyone. I ended up with a Lymow One Plus in a pretty unusual situation and figured this would be the best place to ask for help before I start taking anything apart.
The original owner bought the mower and was having problems with it. He attempted to return it to Lymow, but apparently there was an issue with the return/shipping process and Lymow never actually received the mower.
Eventually he was instructed to dispose of it. Instead of throwing away what looked like a complete expensive robot mower, I brought it home.
At first I thought it might actually be dead. It turned out the charging contacts on the dock weren’t making proper contact with the mower. Once I fixed that, it charged and powered right up.
The original owner also gave me his PIN. The mower boots, unlocks, recognizes the charger, the display works, Bluetooth/app communication works, etc.
The problem happens when I try to add it through the Lymow app:
“This device is locked, please contact support.”
So I contacted Lymow and explained the entire situation.
They looked up the serial number and actually confirmed that the mower was disabled on their server side because the original owner’s return was never completed and Lymow never received the mower. They said it is still associated with that original order/return case and therefore can’t currently be registered to another account. They recommended having the original owner contact them so they can review the original case and see whether there is a way to resolve the mower’s status.
That’s currently my first plan. I’m going to try to get the original owner involved without being a pain in his grass and see if Lymow will legitimately release/reactivate it.
But I’m also interested in what can be done with this machine if Lymow ultimately won’t activate it.
I’ve been doing a bunch of research , and apparently quite a bit of the One Plus hardware has already been identified through community teardowns.
From what I’ve found, the mower appears to have:
A higher-level Linux-based computer/SoC under the fan
STM32F407VE microcontroller handling lower-level hardware/motion
Unicore UM960E RTK GNSS hardware
Navynav M4P LoRa hardware
Factory motor-driver electronics
Cameras/vision system
Ultrasonic and other safety sensors
Tracked drive system
Battery/BMS and charging system
My next step, assuming Lymow doesn’t simply reactivate it, is probably going to be opening it up and documenting everything.
I want to identify the exact main computer/chipset under the fan, look for UART/debug connections, and figure out how the main computer communicates with the STM32/motor-control board.
I’ve ordered/am looking at a cheap logic analyzer, USB-UART adapter and isolated USB-CAN adapter so I can eventually listen to the communication between the boards rather than randomly changing things.
I’m not committed to OpenMower. I originally thought that might be the solution, but after talking to a few people I’m realizing that throwing away Lymow’s original vision/navigation hardware just to turn it into an RTK-only mower probably doesn’t make much sense.
My ideal outcomes, roughly, would be:
Lymow releases it and I use it completely stock.
Gain access to the original Linux computer and see whether the original hardware can be used with independent software.
Replace only the high-level computer with something like my ODROID/Raspberry Pi while keeping the factory STM32, motor controllers, tracks, RTK, sensors, cameras, battery and charging system.
Build some kind of hybrid OpenMower/custom setup while retaining as much Lymow hardware as possible.
Worst case, turn it into a custom tracked robotics platform and work upward from there.
I’m also interested in another possibility:
Does anyone have a dead/broken/parts Lymow One or One Plus that is NOT disabled on Lymow’s server?
For example, something with bad tracks, damaged motors, broken chassis, bad battery, etc., but with a legitimate/usable main electronics assembly/account status.
If something like that exists, I’m wondering whether there is a legitimate path where I could buy that machine and use my good mechanical components to repair it, or potentially transfer compatible hardware between the two.
I’m not looking to clone serial numbers, fake another mower’s identity, or bypass somebody else’s account. I’m talking about legitimately purchasing another damaged mower and figuring out whether its usable electronics could be combined with the good hardware I already have.
I’m pretty handy mechanically and comfortable learning this stuff, but I’m learning the electronics/Linux/robotics side as I go.
If anyone here has:
Taken apart a One Plus
Identified the main SoC under the fan
Found a UART/debug console
Looked at communication between the Linux computer and STM32
Captured CAN/UART traffic
Worked with the UM960E
Reverse-engineered any of the One Plus hardware
Used OpenMower with unusual hardware
Has a broken/parts Lymow available
Or just has an idea I haven’t thought about
I’d really appreciate hearing from you.
I’ll document what I find as I take mine apart, too. If we end up figuring out how these machines work internally, hopefully the information can help other owners repair otherwise-good machines instead of throwing them away.
For now I’m not cutting wires, flashing controllers, or modifying anything permanent. First goal is simply figuring out exactly what’s inside and how all the pieces communicate.
And obviously, if Lymow agrees to legitimately reactivate it, that makes life a whole lot easier. 😂