Heltec WIFI Kit8 Board ESP8266 32MBit

This WIFI Kit 8 is an original Heltec board with ESP8266 microcontroller and on-board OLED display, suitable for debugging and for displaying measured values. The board also has a LiPo connector with charge controller. Because the deep-sleep current of approx. 10 mA is somewhat high, it is only partly suitable for mobile use. It can be programmed with the Arduino IDE and connects projects to the internet via WiFi, for example a data logger that writes values to a cloud.

Important: The ESP8266 is a pure 3.3 V controller, all inputs and outputs may only be operated with 3.3 V. A Logic Level Converter is needed for 5 V signals. The board fits on a half-size breadboard, leaving enough room for Dupont cables on both sides.

Recommended Accessories:

• Logic Level Converter 2-Channel 5V / 3.3V
• 4-Channel 5V / 3.3V Logic Level Converter
• 0.3m Micro USB 2.0 Cable blue

Features:

• Micro USB for programming and power supply, USB-serial converter CP2104
• The OLED uses GPIO4 (SDA), GPIO5 (SCL) and GPIO16 (RST), do not use these pins for anything else
• Address pins via the label or the GPIO number: digitalWrite(D6, HIGH) corresponds to digitalWrite(12, HIGH), D6 is GPIO12
• Analog input A0 up to a maximum of 3.3 V
• PRG and RST buttons on the board

Application Examples:

• IoT applications with on-board display
• Data logger with cloud connection
• Display of measured values

Documentation:

• WIFI Kit 8 OLED connection and Arduino IDE (HomeDing)
• Installation in the Arduino IDE (ESP8266 Arduino Core)
• Heltec WIFI Kit8 schematic
• Heltec WIFI Kit8 pinout
• CP210x driver (Silicon Labs)

Technical Data:

• Type: HTIT-W8266
• Version: B
• Manufacturer: Heltec
• Controller: ESP8266
• OLED controller: SSD1306
• OLED resolution: 128 × 32 pixels
• USB-UART converter: CP2104
• Connector: Micro USB
• CPU: 80 MHz, 32 bit RISC
• RAM: 96 kB
• Flash: 32 Mbit
• WiFi: client and access point mode
• 10 digital I/O pins, 1 ADC (10 bit)
• Integrated WiFi antenna
• Integrated charger for 3.7 V LiPo batteries
• LiPo connector: JST 1.25 mm
• Dimensions: 51 × 18.2 × 8 mm
• Weight: 8 g

Scope of Delivery:

• 1× Heltec WIFI Kit8 board ESP8266 32MBit
• 2× Pin headers 12×1P