Espressif ESP8266 Manual page 20

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3. Click the "START" button on the ESP8266 Flash Download Tool to enter the "SYNC"
state. Wait for the ESP-Launcher to power up.
4. Power up the ESP-Launcher, and start downloading firmware.
Toggle the switch "2" to the lower side to set ESP-Launcher to download mode. And
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toggle the switch "1" to the upper side to power up the ESP-Launcher. More details
about the ESP-Launcher are in Section 3.4.
• The Flash Download Tool will start to download firmware into the ESP-Launcher. The
DETECTED INFO area on the ESP8266 Flash Download Tool will display information
about the flash chip on the ESP-Launcher.
Espressif
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Figure Ⅱ-2. "SYNC" State of Flash Download Tool
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Figure Ⅱ-4. Starting Downloading Firmware
Figure Ⅱ-3. ESP-Launcher
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Appendix Ⅱ
2016.09