Now you have a barebones ESP-01 programming adapter ready to work with Arduino IDE. The next step is to start your own experiments with ESP-01. For examples, the Arduino core for ESP8266 comes with ...

It turns out that there are different types of flash used with the ESP8266, and the correct programming mode must be selected for a given hardware setup.

Beyond the 3D printed holder for the pogo pins, this programmer uses a FTDI USB-to-serial adapter, a couple passive components to smooth out the power going into the chip, and a couple buttons.