Programmer for module ESP-01
If do you see in Arduino IDE console text "Connecting" then, switch GPIO0 pin to ground, ant push RESET button. After sucessfully upload source code to module ESP-01 please disconnect GPIO0 pin from ground, and push RESET button. After this step is surce code uploaded in MCU.
Do you need this USB to UART converter, but please logic level you must set to 5V 
