NodeMCU PyFlasher is a self-contained NodeMCU flasher with GUI based on esptool.py and wxPython. This utility requires absolutely minimal user input. NodeMCU PyFlasher doesn't have to be installed, just double-click on it and it'll start. The esptool.py "console" output is redirected to text control on the GUI.
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A free program for Mac, by Pocket Bits LLC.
