S401M16 LCD display with TD1621 LCD driver

Other Hardware Displays
6

OK so now I also tried finished 4 digit LCD modules I bought using HT1621 chip. neither give any correct output using the HT1621 library. See link below.

no clue how to address a single segment directly, nor how to make the library output a number correctly, I suppose it needs some new mapping for 4 digits? is there any way to find out the right addressing?

see module here: https://fr.aliexpress.com/item/32924015493.html?spm=a2g0o.productlist.main.4.33c9TQU2TQU2FJ&algo_pvid=ff9fd78a-a755-4302-ad16-589bdda07bd7&algo_exp_id=ff9fd78a-a755-4302-ad16-589bdda07bd7-3&pdp_ext_f={"order"%3A"8"%2C"eval"%3A"1"}&pdp_npi=6%40dis!EUR!3.11!3.11!!!3.58!3.58!%402140c1e917574418667792175e74b0!66069954006!sea!LU!2472185907!X!1!0!n_tag%3A-29919%3Bd%3A4031f880%3Bm03_new_user%3A-29895&curPageLogUid=TOdTPtxoCKj4&utparam-url=scene%3Asearch|query_from%3A|x_object_id%3A32924015493|_p_origin_prod%3A#nav-specification