Duo S RISC-V/Arm SBC features Sophgo SG2000 SoC, Ethernet, WiFi 6, and Bluetooth 5 connectivity
Linux and RTOS are said to be supported on the Duo S, and you’ll find buildroot-built OS images on GitHub to boot from either the microSD card or the eMMC flash. As of the current v1.0.9 image, Duo S does not yet support wiringX (C) and pinpong (Python) GPIO libraries, and Arduino support is not implemented either. The latter means the board will eventually be programmable like a microcontroller using the Arduino IDE as is already possible on the Duo 256M with SG2002. Some instructions to get started can be found in the wiki.