Failed to unlock

[HellaK-png]

Hi David, I am trying to unlock my V10 pack with your firmware and a pi 2. After running I get this error.

"Unlock Failed"
"Unable to unlock pack"
Then it aborts.
Thanks.

[davidmpye]

Hi, It's most likely a connection issue - there is insulating varnish on the pin-holes that needs to be carefully removed to ensure good contact. David

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On Wed, 19 Jun 2024 at 18:35, HellaK-png ***@***.***> wrote: Hi David, I am trying to unlock my V10 pack with your firmware and a pi 2. After running I get this error. 20240619_132926.jpg (view on web) <https://github.com/davidmpye/V10_Dyson_BMS/assets/173296709/ec83f636-025f-465f-803b-b8dadd4ff168> "Unlock Failed" "Unable to unlock pack" Then it aborts. Thanks. — Reply to this email directly, view it on GitHub <#14>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AARIHYNATJ5JT7QE7JZR3Y3ZIG6PZAVCNFSM6AAAAABJSO3ZQ6VHI2DSMVQWIX3LMV43ASLTON2WKOZSGM3DEOBWG42TENY> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[HellaK-png]

Hmmm, I've resoldered all the connections and I'm still getting the error. The pack flashes 5 red lights when it is attempting/unable to unlock.
Thanks.

[HellaK-png]

For anyone else with this issue, I followed another users comment and wired the 3.3v lead. This made the programming successful.
Thanks for your work on this project David!

[davidmpye]

Hi, I'm really pleased it worked, but surprised that it needs the 3.3v supplied externally. I had advised against it as there's a small risk that the 3.3v regulator on the board might backfeed the vReg on the Pi. Or potentially vice versa. But if it works....! David

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On Fri, 21 Jun 2024 at 14:11, HellaK-png ***@***.***> wrote: For anyone else with this issue, I followed another users comment and wired the 3.3v lead. This made the programming successful. Thanks for your work on this project David! — Reply to this email directly, view it on GitHub <#14 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AARIHYMBUREZNS46KUCGB2DZIQQ75AVCNFSM6AAAAABJSO3ZQ6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCOBSG4ZDONZRGA> . You are receiving this because you commented.Message ID: ***@***.***>

[Compelica]

I had to plug in 3.3v as well, mine was the 2300 MaH version if it matters.

Also to anyone needing to remove the conformal layer - magic sponge works very well. If you're not sure what it is, it's a very lightly abrasive block of foam typically used in kitchens.

[davidmpye]

Interesting - I wonder if the packs are going straight back to sleep, so the regulator isn't providing 3v3 from the pack cells. Another thing you can use to remove the lacquer is either a soldering iron (by tinning the pads but be careful not to short them out!), or a fibreglass pencil like: https://www.amazon.co.uk/Modelcraft-PBU1019-1-Glass-Pencil/dp/B002Z8IX36 David

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On Tue, 7 Jan 2025 at 14:53, Compelica ***@***.***> wrote: I had to plug in 3.3v as well, mine was the 2300 MaH version if it matters. Also to anyone needing to remove the conformal layer - magic sponge works very well. If you're not sure what it is, it's a very lightly abrasive block of foam typically used in kitchens. — Reply to this email directly, view it on GitHub <#14 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AARIHYKDZ72NPCTCQZJHDAT2JPS6TAVCNFSM6AAAAABUX325WOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKNZVGQ4TKNRYHA> . You are receiving this because you commented.Message ID: ***@***.***>