I struggle to find a solution in all posts about Math.h functions not working with ULP coprocessor with variables, but working with constants. I run platformIO with IDF (last update from July 2025) on ...

DATAFRAME_ORIGIN_FILE = r"filtered_df_with_mathematica_strings_421641-435736.pkl" SAVE_FILE = r"filtered_df_with_mathematica_strings_+_correct_variables_421641-435736 ...

A variable's name is known as an identifier. The identifier given to a variable usually follows certain rules known as a naming convention: It can contain letters and numbers but must start with a ...