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
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Wishiot CH340G Programmer USB to ESP-01 Wireless Adapter Module + 4PCS ESP8266 ESP-01S WiFi Wireless Serial Transceiver Module 4MB Flash 3.3V Wi-Fi Module
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First Listed on Newegg
July 19, 2025
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Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.