A cost-effective Internet development program of things, the main chip using ESP8266, with CP2014 USB to series chip, lithium battery interface and charging and discharging circuit, 32 MByte Flash, WIFI antenna, 0.91 inches OLED display.
it can be programmed for Arduino and NodeMCU environments. the operation is consistent with NodeMCU.
leads all the pins of ESP8266

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▼ Features
The main chip using ESP8266, with CP2014USB to serial chip, lithium battery interface and charge and discharge circuit,
32MByte Flash, WIFI antenna, 0.91-inch OLED display.
Working voltage: 3.3V ~ 7V
12 digital pins can be configured to read, write, IIC, SPI, medium, PWM and other functions
1 AD input

▼ Hardware Specifications
• Master chip ESPRESSIF-ESP8266
• FLASH 32 M Bits
• KEY reset,prg
• Dispaly 0.91-inch 128*32 OLED
• Power indicator lamp red
• USB to TTL CP2102
• Module interface read , write , IIC , SPI , the middle , PWM , ect...
• On-board clock 26MHz crystal oscillator
• Working voltage 3.3V - 7V DC
• Working current about 70mA
• Working temperature range -40℃ ~ 90℃
• Size 50.86mm*18.2mm*6.96mm

▼ Power Supply Specifications
• Power Supply USB 5V/1A
• charging current 500mA
• battery 3.7V lithium battery

▼ Packing list:
1 X TTGO ESP8266
1 X Line
2 X PIN