I have really enjoyed the ESP32-C3 (https://www.espressif.com/en/products/socs/esp32-c3)

I have written a few posts that may help you get started with it: - https://danielmangum.com/posts/risc-v-bytes-exploring-custom... - https://danielmangum.com/posts/risc-v-bytes-zephyr-on-esp32/ - https://danielmangum.com/posts/risc-v-bytes-zephyr-before-ma... - https://danielmangum.com/posts/risc-v-bytes-semihosting-zeph...