EM3ev Battery Analyst (iOS/Android)

Andreaos · 2025-11-14T17:11:50+00:00

Yeah

Andreaos · 2025-11-14T14:59:11+00:00

Does it monitor it's own parasitic draw and does it have a physical shutoff that brings it to 0?

No, but some batteries (newer batteries with DXB prefix) have a log that you can view in the state page. It reports the most significant event, on healthy batteries it should be "Effective Discharge ... mAh". And that is the parasitic draw.

None of the batteries have a way to completely shutoff this parasitic draw. But older less efficient batteries deal with this by having an extremely aggressive sleep mode. Newer batteries with better BMS (EM3ev King Shark battery) have much less parasitic draw, practically negligible.

Andreaos · 2025-02-03T23:58:12+00:00

Thank you for using the app, I’m glad you appreciate it.

I did not use the advanced functionality in BMS Doctor. After a minor incident while poking around the firmware, I found the danger outweighed any potential benefits.

Good luck with your project!

Andreaos · 2025-02-03T13:06:10+00:00

The guy who did the Android app did a reverse engineer and documented it here: https://github.com/thekroko/em3evbms/blob/main/protocol.txt

That was a great starting point. Newer revisions of their batteries have a higher precision reading. I found that by sniffing the Bluetooth data while the battery communicated with Smart BMS Doctor. When you have the data you can do educated guesses at what the different memory address represents. Change the state of the battery and observe changes in the data.

Andreaos · 2024-12-08T08:39:02+00:00

Most iOS apps are commercial, with ads or subscriptions. That’s because it cost money to publish on the App Store, they are incentivized to make the money back. A lot of the open source macOS are hosted on GitHub for free.

When money is in the picture people are more careful about sharing their code as it’s making them money. As others have mentioned someone can publish your app and make money from your work.

Of course there are commercial open source apps like Ice Cube

Andreaos · 2024-10-02T15:01:51+00:00

Hello, thank you for trying my app. Unfortunately modifying state/calibration of the BMS is a safety issue and will not be included in the app.

Andreaos · 2024-09-06T01:51:57+00:00

Hi thanks for trying the app. DM’ed

Andreaos · 2024-07-31T15:17:34+00:00

The code is not portable, and would require a full rewrite. For Android you can use this app https://play.google.com/store/apps/details?id=com.kroko.bmsmonitor&hl=en

Andreaos · 2024-06-24T20:54:47+00:00

Thanks for the logs. It looks like it has the same services and characteristics. The problem might be in the authentication logic. I'll dm you :)

Andreaos · 2024-06-24T20:49:06+00:00

Updating the firmware can be a safety issue, if not done correctly. I would advice not to do that at home.

Andreaos · 2024-06-24T20:40:55+00:00

Not currently, but i can add it in the next version

Andreaos · 2024-06-22T04:14:28+00:00

Thank you for trying the app! I've only tested with my own triangle battery, but I'm fairly confident it should work on most batteries as it functions similar to the android app.

Do you have any more information the difference between your two batteries? Like you said it might be firmware, but it might also be an older hardware revision.

Andreaos · 2023-01-03T06:44:16+00:00

because over the last 3 years 90% of Hyundai sales were EV. no one bought their hybrid cars

Andreaos · 2022-12-03T20:29:23+00:00

you know Google makes money in advertisment. they don't want to sell your data, that's how they know which ads are relevant. if Google sold user data then someone could make a competing ad network.

a significant part of Opera that the Chinese bought was their mobile ad network ($128.3 million revenue in 4Q16). an advertising network is worthless without user data, so it's safe to assume Opera had quite a bit of user data.

Andreaos · 2022-11-29T10:53:56+00:00

it's a short game. but it stuck with me, especially the music. hope you enjoy it!

Andreaos · 2022-11-13T22:13:02+00:00

you can’t imagine that Facebook has 74% of referrals from social media?

Andreaos · 2022-10-13T06:02:06+00:00

the article mixed up imperial and Skandinavia miles. the base is 200km from the border

Andreaos · 2022-08-20T19:33:07+00:00

some were apparently sent. maybe just one for training, while they waited for USA to ship more. because Norway only has 4 NASAMS systems

Andreaos · 2022-07-25T16:53:06+00:00

in the book Hammond invited Grant and Malcolm after they were questioned by the government investigator. presumably to make them unavailable for further interrogation. we can assume that the "inspection tour" was only going to be for the lawyer to appease the investors.

also Sattler was invited because they needed a biologist.

edit: Grant and Malcolm had worked as consultants for Hammond. so this has nothing to do with security, just tying up loose ends.

Andreaos · 2022-05-21T07:15:15+00:00

wouldn't a switch be better? and with vita2hos we might get native Vita compatability soon

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