yancanPlug TinyESP to the board and upgrade firmware. The chip is CP2102.
I made a USB to UART converter for TinyESP
A project log for TinyESP ESP8266 Breadboard Adapter
TinyESP is a tiny size breadboard adapter for ESP-12/ESP-07 ESP8266 WiFi module. It contains a 3.3V voltage LDO, a Reset button and a flash
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