Esp8266 Esp-01 Datasheet Fixed

The ESP8266 ESP-01 is arguably the most iconic Wi-Fi module in the history of IoT (Internet of Things) development. Produced by Espressif Systems, it served as the introduction for millions of makers to low-cost, embedded Wi-Fi connectivity.

The newer fixes several ESP-01 issues:

The ESP-01 uses an external SPI flash (typically 512KB or 1MB). The flash shares pins with some GPIOs internally, which means: esp8266 esp-01 datasheet

| Feature | ESP-01 | ESP-01S | |---------|--------|---------| | LEDs | Red (power) only | Red (power) + Blue (GPIO1) | | Pull-ups | External needed | Built-in for CH_PD, GPIO0 | | Pinout | Same | Same (better labeled) | | Deep-sleep | No | No (still missing GPIO16) | The ESP8266 ESP-01 is arguably the most iconic