1) Breakout/Programmer for the ESP-07, ESP-12, and ESP-01 modules. FTDI interface connector, 3.3V regulator, reset/program buttons, level-shifting on the RX serial line, on/off switch, and an 8-pin socket for the ESP-01...
2) Breadboard "T" adapter for the ESP-07 and ESP-12 modules. FTDI interface connector, 3.3V regulator, reset/program buttons, and level-shifting on the RX serial line...
Both use pluggable/removable ESP modules...