Long story short: I have old Koowheel hubs and am currently trying to set them up with Flipsky dual FSESC 420. It looks like 2 VESC glued up. When connected to master ( first ) VESC via USB I got a popup wanting to upgrade the firmware. It went smoothly. Unfortunately second VESC wasn"t so cooperative. I can send new firmware to the board, but it newer gets updated. After some search it looks like this VESC ( Flipsky ) does not support bootloader. That is especially weird considering the first one did get updated. Right now I got slave ESC stuck at firmware 3.4 and master is at 3.65. As it is I can’t use dual motors because the tool prevents me from doing so ( limited mode ).
Is it possible to update the slave to 3.65 without STLINK ? Or maybe it is a better idea to downgrade master VESC to 3.4 ? I read somewhere that VESC-tools comes with firmwares preinstalled so legacy version could in theory solve my problem.
Thanks for help in advance !