How to reflash the bootloader with factory firmware

You can simply connect the board to a PC via USB Type-C and reflash the bootloader with factory firmware by using ESP RF Test Tool.

• Step 1. Hold on the BOOT BUTTON and connect XIAO ESP32C3 to the PC to enter bootloader mode

• Step 2. After it is connected, release the BOOT BUTTON

• Step 3. Visit this page and download ESP RF Test Tool and Test Guide

• Step 4. Extract the .zip, navigate to ESP_RF_Test_EN\ESP_RF_Test_EN\EspRFTestTool_v2.8_Manual and open EspRFTestTool_v2.8_Manual.exe

• Step 5. Select ESP32C3 as the ChipType, your COM port, 115200 as the BaudRate and click open

You will see the following output

• Step 6. Select Flash and click Select Bin

• Step 7. Download the factory firmware of XIAO ESP32C3 and select it.

• Step 8. Finally click Load Bin

You will see the following output when flashing is successful