Seba Posted January 7, 2023 Share Posted January 7, 2023 I have quite a bit of experience in updating firmware in wheels from many manufacturers. While this process is not always trouble-free, because the manufacturers' applications are far from perfect, almost always I was able to complete the update successfully. To date I was never left with a bricked wheel, as there is almost always a way to recover from a failed firmware update. There is even a feature in EUC World that automatically recovers a King Song wheel from a failed update state. However, I now have a Sherman Max, which has firmware version 1.1.2, and there is a 1.1.6 available, which, among other things, solves the problem with the total mileage displayed negative on LCD, but also supposedly improves the operation of the Hall sensor. Unfortunately, the firmware update application is quite primitive, and - to be honest - I'm worried whether a possible problem in its operation will leave me with a bricked wheel. Hence my question to you - has anyone experienced problems in updating the Sherman using the app from LeaperKim? If there is a problem during the upgrade, is it possible to upgrade again? I would appreciate your comments. 2 1 Quote Link to comment Share on other sites More sharing options...
Chriull Posted January 8, 2023 Share Posted January 8, 2023 Never heard of any bootloader activation procedure like putting a ks upside down, which i read just recently from you. Afair inmotion has something like this with laying the wheel aside? Would be great for the community to collect "unbrick procedures" for all wheels! Otherwise this seldomly needed knowledge is lost somewhere in some posting histories... Afair the programming interface is (not to difficult) accessible with gotway wheels, so maybe too with the sherman max? @Freestylernot only looked at gotway fws but also veterans? BTW a question to for example ks unbricking procedures. If by a bad fw update the fw is stuck in a endless loop and turning off does not work anymore one has to disconnect the batteries, turn the wheel upside down and then reconnect. So the wheel starts into the bootloader code? Quote Link to comment Share on other sites More sharing options...
Freestyler Posted January 8, 2023 Share Posted January 8, 2023 42 minutes ago, Chriull said: @Freestylernot only looked at gotway fws but also veterans? I have looked a bit, but not to the extend of Begode wheels. I'm also interested to know a recover process for veteran wheels. Maybe @Lefteris has some more info here? 1 Quote Link to comment Share on other sites More sharing options...
Lefteris Posted January 8, 2023 Share Posted January 8, 2023 3 minutes ago, Freestyler said: I have looked a bit, but not to the extend of Begode wheels. I'm also interested to know a recover process for veteran wheels. Maybe @Lefteris has some more info here? Haven't had the time to play with the firmware chip that I have here from the OG Sherman. From what I know Veteran has a procedure that the wheel gets into some kind of a dfu mode, flashes it, then reboots into normal state. Quote Link to comment Share on other sites More sharing options...
Popular Post Lefteris Posted January 8, 2023 Popular Post Share Posted January 8, 2023 On 1/7/2023 at 11:00 AM, Seba said: Hence my question to you - has anyone experienced problems in updating the Sherman using the app from LeaperKim? If there is a problem during the upgrade, is it possible to upgrade again? I would appreciate your comments About your question @Seba I've translated the LeaperKim app to English and from what i see if you follow some specific steps you may avoid having problems during the update. Some if these are : Having the wheel charged and not connected to the charger while updating Changed language of your Android v11 / v12 to English US don't try with Android v13 Allowed location usage to the app in the android settings, it doesn't ask for location, go into settings and give the perms Connected the LeaperKim App to your Sherman, checked the kilometers, played for short with headlight button on app, to check if its really working. Put your Sherman to the side, let it beep once and then positioned it carefully on the rear stock fender (in other, balanced position it won't update!, see my video bellow), Go to the three dots and clicked update. Read carefully the warning and tapped "update", "start" and wait patiently, First, the app is downloading the firmware, then checking it and then uploading it to the sherman (it shows all processes with percentages). During uploading the fw to the sherman, hold the phone next to the display for that the connections is stable. During updating by the app, the sherman shows "no conn" and other messages. Stay patiently, don't move the phone away and WAIT... After all processes, the app will restart the sherman with some beep, Sherman will restart and disconnect from the app. The app will not connect again until you restarted the sherman by yourself by pressing the power button on and off at the wheel (my experience) Done. Trip and distance memory has still same data like before. And I have all new settings in the menu, like others. For the latest Sherman MAX APK on github And if you experience any of the following problems or need information, there is as list on the Veteran Sherman Club Telegram Group More about my translation fork here 4 Quote Link to comment Share on other sites More sharing options...
fbhb Posted January 22, 2023 Share Posted January 22, 2023 OG Sherman Firmware 1.0.59 is available for updating in the Leaperkim app. Anyone able to translate item 1 to see what change it includes, if any? Also, has anyone tried it yet and noticed any differences? https://github.com/Leaperkim/Updated-APP-Firmware/blob/f156f48f606fcb20bda0d4cd9733199cfe510df7/LeaperKim-1.0.3 221206.apk 1 Quote Link to comment Share on other sites More sharing options...
Lefteris Posted January 22, 2023 Share Posted January 22, 2023 As mentioned by @Seba in another forum, only fixes the negative milage on the display, nothing different from 1.0.58.. 2 Quote Link to comment Share on other sites More sharing options...
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