Hi,
Thanks for posting this. I've just uploaded the file to the esp32devkitC with an i2c lcd and tested it with a sig gen and it works fine for me.
Any more interesting projects in the pipeline?
Don m5aky

I have this line in my main coilwinder.cpp file:-

extern "C" void app_main()
{

I changed it to: extern "C" void app_main(void)
{

Was that correct?

But I still get the same result.
Thanks for your help and advice.

Don

Hi ESP_krzychb Thanks for the reply. I had a look and I see the additional line in the CMakeList and Makefile files:- set(EXTRA_COMPONENT_DIRS "$ENV{IDF_PATH}/examples/cxx/experimental/experimental_cpp_component") I added this to my files together with the sdkconfig file but it makes no difference. ...

Hi I've made some progress. I can build the examples, blink and hello_world, and successfully flash the esp32devC board. However, when I come to build the program I want, which is a stepper motor controller, I get the following error message after it has gone through idf.py build:- undefined referen...

Hi.
My reply took a little while to appear.
In the meantime someone suggested using sudo ./install.sh from the esp-idf directory and it seems to have worked.
On to the next step.
Don

thanks for the reply Is this what you mean? vosper@vosper-HP-G61-Notebook-PC ~ $ cd ~/esp/esp-idf vosper@vosper-HP-G61-Notebook-PC ~/esp/esp-idf $ ./install.sh Installing ESP-IDF tools Installing tools: xtensa-esp32-elf, xtensa-esp32s2-elf, esp32ulp-elf, esp32s2ulp-elf, openocd-esp32 Skipping xtensa...

Started from scratch. Installed prerequisites, got esp-idf and Set up tools. Situation is the same. The message says to "follow the instructions found in the "Set up the tools" section" but there are only two instructions there for Linux :- cd ~/esp/esp-idf ./install.sh Is there possibly something t...

I'm trying to install esp-idf on a Linux Mint pc. I have followed the Get Started instruction at espressif.com. All went well until I entered " . $HOME/esp/esp-idf/export.sh" Then I get:- "Setting IDF_PATH to '/home/vosper/esp/esp-idf' Adding ESP-IDF tools to PATH... Using Python interpreter in /usr...