USB to ESP-01 adapter module features CH340G USB to TTL driver IC onboard, so you can easily use your computer to perform ESP-01 functional debugging. The ESP-01 serial wireless module can be plugged directly into the yellow pin header without connecting cables.
Special features:
Operating voltage: 4.5V - 5.5V (built-in 3.3V LDO controller)
Working current: 300mA (LDO controller can delivery)
Selectable working mode: built-in toggle switch UART side for serial TTL debugging by AT commands, PROG for firmware programming.
USB to serial TTL chip: CH340G.
Logic Level: 3.3V
Applications: home automation, sensor networks, industrial wireless control.
Package includes:
2 x USB to ESP8266 ESP-01 WiFi Adapter Module