Olimex ESP32-P4-PC is an open source IoT board with a 400 MHz dual-core RISC-V chip and plenty of I/O for $29
Open hardware maker Olimex has introduced a new development board powered by an ESP32-P4 processor featuring a dual-core 400 MHz RISC-V processor, and a low-power 40 MHz RISC-V microcontroller core. With just 768 KB of internal memory, 32MB of PSRAM, and 16MB of SPI flash storage, the Olimex ESP32-P4-PC is clearly not meant for use as a general purpose computer. But it's a fairly versatile system for low-power IoT development thanks to a robust set of input and output capabilities.
