UNO R3 ESP8266 serial WiFi expansion board shiled ESP-12E development board for Arduino Xiaobai without any knowledge of ESP8266 configuration can also be used easily 10 support pwm / interrupt / serial port / i2c expandable gpio Compatible with UNO r3 configuration and calling syntax! The custom firmware of the expansion board can be updated through uno r3 No need for USB to TTL converter One key to enter flash mode without any wiring Use standard pin interface spacing for rduino Uno, Mega, etc. to achieve full compatibility. (Unless the standard size for rduino, such as Nano, Mini) Using advanced 3.3V power chip (the same as the official CC3000 expansion board power chip), the 3.3V provided in the for Arduino board is more accurate, so that the ESP8266 works like the official cc3000 chip without any gap. A WiFi module power supply / maintenance interface is introduced to facilitate developers to expand power supply and maintenance. Onboard ESP8266-12 industrial-grade stable serial WiFi module, using enhanced PCB antenna, the signal is better. You can quickly switch the operating mode (such as operating mode and upgrade mode) of the ESP8266-12 industrial-grade stable WiFi module through the dial switch, integrate the serial port chip, and quickly flash the firmware. Built-in 5V to 3.3V TTL level converter to prevent high voltage for rduino TTL level from causing damage to WiFi module. (General modules are not available) The onboard ESP8266-12 industrial-grade stable WiFi module has a metal shielding cover, which is strong in anti-interference. Lead out all the interfaces of the onboard ESP8266-12 industrial-grade stable WiFi module at a standard pitch, which is convenient for developers to develop in depth. Provide the for rduino library of ESP8266-12 industrial grade stable WiFi module written by this station, which can be controlled by very simple instructions and provide routines. 7 × 24 online, forum, email technical guidance, sample programs, and technical information sharing. With a stackable design, you can continue to accumulate other modules on it for easy use. Onboard 4 LEDs display the status of ESP8266, including PWR, DFU, AP, STA, and operation mode at a glance This product can be applied to: Remote control of electrical appliances / models / four-axis aircraft, etc. Provide networking services for non-smart devices Household temperature / humidity / PM2.5 display, etc. Smart switch