Description Based on ESP8266 MCU WIFI solution, on board battery charge and use function, support all of our this series child board via on board connector, plug to use. Board Features: Reset and IO0/PROG button, power and IO2 led. Default I2C pull-up resistors on pin IO4 and IO5 On board CP2104 auto-download USB-TTL bridge Lead out all pins Board Power Features: On board TP4067 battery charger: Up to 600mA charge current Charge and standby led indicator (front) Support anti-reverse direction by chip Default for 4.2V lithium battery, also customizable for 4.35 or 3.6V LFP battery Power supply auto-switch between USB supply charge or battery supply. On board 1.25mm battery connector, or reserved to support CR123A battery connector One power on/off switch Board Connector Features: Board-to-board connector, plug in to use, without any wirings. Can be futher lock by 2mm screw hex spacer. Connector pin definitions please see on this page. UART interface is selectable by jumper. And can be connect to ESP8266 hardware UART TXD/RXD or software UART IO12/IO14. Tested with ESY-LINK, child board can be remotely control by WIFI to hardware UART. Shipment includes: main board, 1.25mm battery one-end male 10CM cable. More documentation please see on this page.
