Key features

• •Note: This item comes unassembled, soldering of headers is required. Lithium battery is not included, battery may be purchased here: https://www.amazon.com/dp/B07CXNQ3ZR. Please feel free to email us if you have any questions or you would have a bulk order, how to email us? Click "MakerFocus" and "Ask a question". Looking forward to your consultation!
• •YouTube: ★https://www.youtube.com/watch?v=Clmsw8AH32U. ★How to Install Heltec ESP8266 Based Dev-baords Develop Environment: https://docs.heltec.cn/#/en/user_manual/how_to_install_esp8266_Arduino. ★Arduino library for Heltec ESP8266 based boards: https://github.com/HelTecAutomation/Heltec_ESP8266
• •Link to download English documentation and pinout diagram: ★https://www.adrive.com/public/drzr3P/datasheet%20F000905.rar. ★https://drive.google.com/open?id=0B8DSGdAr8_31d19WQmN6SE1fLVE, ★https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series
• •This ESP8266 OLED development board with 0.91 Inch 128*32 OLED Display, display color is white, with WIFI, You will have an advanced and fun development environment! It has 12 digital pins can be configured to read, write, IIC, SPI, the middle, PWM and other functions; 1 AD input, Working voltage: 3.3V 7V
• •Main chips: esp8266 chip, cp2102 chip, leads all pins of ESP8266. Support Arduino and NodeMCU programing. To know more details of specifications, pls carefully view the images