Mini apm 3.1 unbrick 2560 bootloader fix

showing the pad locations and the steps on how to unbrick a Mini apm 3.1

AVR ISP Programmer

unbrick
File=unbrick apm.7z // get this file

use 7-zip to extract files

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banggood isp
I include files for both of those units as well.
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[adrianlee]

Have a pixhawk clone I think or 2.4 or something of that sort, but I try updating the firmware last night and now I think its brick. When I plug it to the computer it show up in the comports 22 and then disconnect. So I can't get to update. Any help please.

[fndfpv]

HiHello I am following the process of unlocking from this video for a Mini Apm Pro, and thanks to the detailed step by step that you have made with it, i can complete the entire process and reach the end, respecting exactly all the steps.
The last step is when the program says that you have to disconnect the usbasp and connect the mission planner.
There comes back to me the problem of "connection error" at the end of the installation of the firmware or the countdown of time out if I try to connect the mission planner through the port to 115200.
Do you know what's going on ??
What am I doing wrong ??

[fndfpv]

Hi but thione is not like Mini APM Pro, do you think
Can I follow the same steps that you have done in this mini apm 3.1?

[geofrancis]

do you know where the bootloader pins are for the 32u ppm encoder chip?

[rccarsandmusic]

3.1 mini a real pain looks like
glad I stayed with 2.8