Description This ESP8266 / ESP-WROOM-02 WiFi Bluetooth 18650 Battery Charger Board is based on ESP-WROOM-02 an FCC Certified module with 18650 Li-Ion Power Bank, and battery charger circuit. ESP–WROOM–02 integrates a 2-MB SPI flash. ESP–WROOM–02 supports these SPI modes: Standard SPI, DIO (Dual I/O), DOUT (Dual Output), QIO (Quad I/O) and QOUT (Quad Output). It has 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported. Features Version : V1.0 Brand: WeMos A convenient Micro USB connection Operation and charging are possible at the same time 18650 charging circuit including the 5V boosting circuit with TP5400 CP2102 USB Serial Converter and Programming Control Electronics Compatible with Arduino IDE Compatible with NodeMCU On Board 3.3V Regulator RESET and FLASH buttons Built-in LED (Blue Color): Connected on ESP-WROOM-02 Pin 17 / IO16 (WeMos D0) SOLDER terminal for SLEEP MODE Technical Specification WiFi CPU: ESP8266EX WiFi Module: ESP-WROOM-02 Flash Size: 2M Byte (16-Mbit) Max Supported Baud: 921600 11 digital input/output pins 1 analog input(3.3V max input) Built-in dividing resistor (AD = 220K – ADC – 100K = GND). 10 Digital IO pins Battery Charger Specification: 0.5A charging current 1A output Over charge protection Over discharge protection LED: Red = Charging, Green = Full charging. 3000 mA 18650 It is possible to operate for more than 17 hours on a battery. Board size: 91.5 mm (L) x 26.0 mm (W) x 25.0mm (H) including 18650 battery Pinouts Following table lists how pins on ESP-WROOM-02 18650 module are connected with ESP-WROOM-02 surface mount module. Pin No Pin Name ESP-WROOM-02 Pin ESP-WROOM-02 FUNCTION 1 A0 16 TOUT / A0 2 D1 14 IO5 / I2C-SCL 3 D2 10 IO4/I2C-SDA 4 D3 8 IO0 5 D4 7 IO2 / UART1_TXD 6 D5 3 IO14 / HSPI_CLK 7 D6 4 IO12 / HSPI_MISO 8 D7 5 IO13 / HSPI_MOSI / UART_CTS 9 D8 6 IO15 / HSPI_CS / UART_RTS 10 RX 11 UART0_RXD / IO3 11 TX 12 UART0_TXD / IO1 12 3V3 1 13 5V N/A 14 GND 9 [!] Notes If the positive and negative direction of the battery is placed incorrectly, the charging chip will be damaged. Documents and Downloads Get started in Arduino Get started in NodeMCU Revert to the Factory Firmware (AT) Schematic ESP-WROOM-02 Datasheet Installing ESP8266 Board definitions to Arduino IDE – Read here ESP8266 and ESP32 Differences in One Single Table CP2102 USB/UART Serial Chip Drivers – Download here ESPEasy is a free and open source MCU firmware for the Internet of things (IoT) and originally developed by the LetsControlIt.com community Package Includes 1x ESP-WROOM-02 WiFi 18650 Battery Charger Board (Tested / QC-OK by Art of Circuits) 1x 14-pin Standard Male-Male header
