ESP32-C3-DevKit-Lipo is EUR 6.00 Open Source Hardware compact development board with:
- RISC-V running on 160Mhz
- 400KB RAM, 8K data RAM
- 4MB Flash
- Two headers (soldered) with power supply and GPIO signals
- ESP-PROG-C compatible rescue connector (if you mess with bootloader)
- USB-C for programming and JTAG debugging
- LiPo battery charger allowing handheld applications with single LiPo battery
- 4 mount holes
This is all you need to get started with RISC-V programming in C and Assembly.
Shteryana Shopova recently did RISC-V workshop with this board and explained how to setup your tools for programming and debugging. Here you can find her work.
olimex 
Oct 06, 2022 @ 23:49:00
Nice!
Bear in mind that the “Internet of Things” category on your web shop currently does NOT appear to list the “ESP32-C3” subcategory. One can find the new board only through searching the name, the pricelist, or a direct link:
https://www.olimex.com/Products/IoT/ESP32-C3/ESP32-C3-DevKit-Lipo/open-source-hardware
Oct 07, 2022 @ 11:13:20
you are right, as always 🙂
Oct 17, 2022 @ 12:35:42
The schematic pdf url points to Not Found
Oct 17, 2022 @ 12:52:45
thanks for noticing this, now is fixed!
Dec 19, 2022 @ 23:02:53
Are there any information about power consumption when powered on via battery ?
Dec 24, 2022 @ 00:35:41
The product page led me to the User Manual, where page 9 lists various power consumption figures depending on the mode (not specifically for battery operation, but I guess they should be the same):
https://github.com/OLIMEX/ESP32-C3-DevKit-Lipo/blob/main/DOCS/ESP32-C3-Devkit-Lipo-user-manual.pdf