@gohan I will use this barebone ESP32S module without LED, USW, Voltage Regulator etc. https://de.aliexpress.com/item/ESP32-ESP32S-WIFI-Bluetooth-Module-240MHz-Dual-Core-CPU-MCU-Wireless-Network-Board-ESP-WROOM-32/32817688406.html?spm=a2g0x.search0104.3.1.3bc34eb5tSg79z&ws_ab_test=searchweb0_0,searchweb201602_5_10152_10151_10065_10344_10068_5722815_10342_10547_10343_10340_5722915_10548_10341_5722615_10696_10084_10083_10618_10304_10307_10820_10821_10302_5722715_10059_100031_10103_10624_10623_10622_5722515_10621_10620,searchweb201603_2,ppcSwitch_3&algo_expid=499485e8-6df0-40d6-8033-c5497748adb9-0&algo_pvid=499485e8-6df0-40d6-8033-c5497748adb9&transAbTest=ae803_1&priceBeautifyAB=0