Install ESP32-C3 in your arduino IDE
1, click File-Preference, and copy below links to “Arduino Preferences Additional Boards Manager URLs”, then click “OK”.
https://raw.githubusercontent.com/espressif/arduino-ESP32/gh-pages/package_ESP32_dev_index.json
2, Click Tools-Board-Boards Manager, and search ESP32, you need download 2.0.0 version, (any version over 2.0.0 is ok)
Testing ESP32-C3:
1, Connect ESP32-C3 board with Mac or PC
2, Choose Tools-Board-ESP32 Arduino-ESP32C3 Dev Module
3, Choose Port
4, Upload code: File-Examples-WiFi-WiFiScan
5, Open Serial Monitor window, then you will find the wifi names.
Purchase link:
1, ESP32-C3-DevKitC-02 Development Board with ESP32-C3-WROOM-02 module:
https://www.diymalls.com/ESP32-C3-DevKitC-02-Development-Board-ESP32-C3-WROOM-02-Wifi-Module
2, ESP32-C3-DevKitM-1 Development Board with ESP32-C3-MINI-1 module
https://www.diymalls.com/ESP32-C3-DevKitM-1-Development-Board-Equipped-with-ESP32-C3-MINI-1-Module