Flash Download Tool

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

ESP8266

SPI Speed

• 40 Mhz
• 80 Mhz

SPI Mode

• QIO
• DIO
• DOUT

Model	SPI Speed	SPI Mode	Speed
ESP-12F	40MHz	QIO	1 500 000

NWI1139

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

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

Common Error

5-chip efuse check fail

Upload

ESP32-C3

• flash speed 80M
• flash mode DIO