

After the installation finished, you can check whether the tool works correctly. This will take care of all necessary dependencies like installing pySerial libraries and so on. Download the zip archive, unpack it, change into that directory and install it systemwide by typing in:

But after spending some hours trying different USB-to-serial boards without success, I finally searched for a way to flash the firmware with Mac OS X directly as well.

As I could communicate with the boards from Mc OS X directly, there is nothing wrong with the boards. I had serious problems today flashing NodeMCU firmware on my new ESP-01 boards with my Windows XP virtual machine today.
