ESP-01 serial wifi module can be directly plugged into the yellow pin header without any connection wires ^^ ESP8266 ESP-01S serial WiFi wireless transceiver module used 4MB Flash, not 1MB flash ^^
Baud Rate: 115200, Selectable
working mode: On-board toggle switch. UART side for serial TTL debugging by AT commands, PROG for firmware programming ^^ Programmer USB to serial
TTL chip: CH340G, please check if your computer has installed the driver before use it ^^ Need a lot of customization? / How to email us? Please click Wishiot(you can find "Sold by Wishiot" under Buy Now button), in the new page, click Ask a question to email us