STM32 boards and PlatformIO. ESP32 is quite popular (as seen by other suggestions) but I find the quality of Espressif, hardware/software/support, is widely va

STM32 boards and PlatformIO. ESP32 is quite popular (as seen by other suggestions) but I find the quality of Espressif, hardware/software/support, is widely varied. FWIW PlatformIO works with Arduino and ESP32 (and will give you a better experience in so many ways)