Did anyone find a working solution?
Thanks

Anyone know if is there an 8266 ESP.getVcc() equivalent implemented on the ESP32 platform yet?
Thanks

I couldn't work out how to read_flash but I managed to run erase_flash which cured the problem and it's now working again,
Many thanks for your help ESP_igrr

For the benefit of others this is how I got esptool.py running under Win10
(Already had Python 2.7 installed)
Add ";C:\Python\Scripts" to ...

One of my ESP32's failed recently giving the following error no matter what program is flashed to it (successfully)

******************************************
ets Jun 8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
ets Jun 8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot ...

Try Arduino core for the ESP32
https://github.com/espressif/arduino-esp32

Hope this helps