Hi ESP_Angus, Thanks for taking the time to reply. I'd put this aside for a while and just flashed from the msys32 command prompt, as it was getting too frustrating. Under the command prompt, "make flash" works, as does calling the python script which was specified to run under Eclipse. I've also tr...

The problem is that eclipse is looking for a fully qualified path. Something like IDF_PATH=c:/msys32/home/ashish/workspace/esp-idf, depending on where you've installed it. Note that it wants forward slashes, not backslashes that a windows 7 shell would want.

For some weeks now, I’ve been beating my head against an environmental problem with the ESP32 environment on Windows 7, and I was hoping that someone here might be able to give me a pointer in the right direction. I’ve set up the pre-packaged msys2 environment and toolchain release from March 30th, ...

One other common I2C Problem: Do you have pull-up resistors on the clock and data lines to 3V3? 2K to 5K are common values.

I've not used the Arduino interface, but did get the MCP23017 to work using Eclipse on the ESP8266. A couple of things you may want to look at: I was using chip address 0x40 instead of 0x20 shown in your example, but the start transmission function may be doing that translation for you. I wrote to t...

The latest all-in-one windows environment (esp32_win32_mysys2_environment_and_toolchain-20170111.zip), when executing the make command incorrectly reports that the wrong tool chain has been installed. The cause is in code added to esp-idf/make/project.mk which checks the version number of the compil...