The X-NUCLEO-ESE01A1 expansion board is based on the STSAFE-A120 secure element. It can be used with any STM32 Nucleo development board. The on-board STSAFE-A120 is customized with a standard profile for evaluation and is compatible with the Arduino® UNO R3 connector. The X-NUCLEO-ESE01A1 expansion board is used with free X-CUBE-STSE01 software packages containing sample code to demonstrate how to implement security applications. https://elecena.pl/product/29106228/x-nucleo-ese01a1-secure-element-expansion-board-based-on-stsafe-a120 2025-07-17 https://elecena.pl/product/29106228/x-nucleo-ese01a1-secure-element-expansion-board-based-on-stsafe-a120 2026-05-28 https://elecena.pl/product/29106228/x-nucleo-ese01a1-secure-element-expansion-board-based-on-stsafe-a120 2026-06-16 https://elecena.pl/product/29106228/x-nucleo-ese01a1-secure-element-expansion-board-based-on-stsafe-a120 2026-08-03