for programming my ESP-01 chip I bought an "USB Uart", but it looks different to all the ones in all tutorials. I don't know how to connect the uart to the esp. The uart i bought has following pins: 3V3, DTR, RXI, TX0, GND, +5V. The ESP01 has the known layout (http://www.esp8266.com/wiki/doku.php?id=esp8266-module-family#esp-01).
Once connected: Do I need an external power source, or do i just connect the usb uart to my computer?