Breakthrough design, there are new breakthroughs, based on ESP-12E.
The new four-layer board design, the new revision antenna RF performance optimization, communication distance is increased by 30% -50% compared to ESP-12E!
Semi-hole chip technology, the whole IO leads, with metal shielding shell.
Built-board PCB antenna, 4M bytes Flash.
Pins and footprint are fully Compatible with ESP-12E and our relevant breakout board.