I've had a v3 OVMS module on my Nissan LEAF for almost 6 years. Wi-Fi only version. It has been a bit flaky recently; not appearing on my Wi-Fi and not creating an AP either. A day later after a power cycle due to car activity it would show up again. It now has no signs of life. I have removed the SD card (works OK on another machine) and have been trying to flash the thing with esptool as per the instructions on the OVMS wiki. I have a windows 10 PC and Raspberry Pis available. Both do show the OVMS device as a port when plugged in via USB. When doing any work with esptool there is never any response from the serial port.
Anybody got advice on what to try next?