Flash Download Tool

• download from - https://www.espressif.com.cn/en/support/download/other-tools

NWI1139

SPI = 40Mhz SPI Mode = DOUT for CH340, speed up to 1 500 000 = 1.5M

NWI1126

ESP32-C3 Factory Mode

• Chip = ESP32-C3
• Mode = Factory
• LoadMode = UART

setup

• Flash Frequency: 40M or 80M
• SPI Mode: QIO or DIO

wiring with USB-TTL cable

• Red = 5V+ Power Supply = pin1 = +5V or VCC
• Green - TXD
• White - RXD
• GND - Ground

ESP32-C3 Enter into Flash Mode

• Connect wiring first
• Hold down IO9
• Press EN or RST button to restart the module, and enter into flash mode