AI Tinker ESP8266 SMT Module ESP-12E WIFI with Breakout

The ESP8266 ESP-12E is a very powerful WiFi module that includes a microcontroller. However, setting up the ESP-12E can be quite complex, as certain pins are responsible for different boot modes and therefore need to be correctly pulled up or down. Fortunately, the breakout board takes care of this task, and simply applying VCC and GND will start the module in normal AT mode. The modules are already programmed with the NodeMCU Lua firmware and are ready to use immediately. They can now even be programmed with the Arduino IDE, and many libraries can be used without modification. The ESP8266 operates at 80 MHz and has 4 MB of flash memory. A total of 9 digital GPIOs are available (some of which can only be used as outputs); they can also be used as I2C or SPI. There is also an analog input with a reference voltage of 1 V. This ESP-12E has additional SPI pads on the bottom side, which cannot be used as IO but are solely for firmware upgrades. Therefore, the pins are not exposed on the breakout board. Note: All ESP8266 boards are 3.3 V and not 5 V compatible! The ESP-12E and the breakout board still need to be soldered together.