1.Introduction
The expansion board features a charging function for the 18650 battery; simply connect the expansion board’s micro-USB interface with a micro-USB cable to initiate charging when the power is connected. Furthermore, the expansion board is equipped with two charging indicator lights onboard; “CHRG” indicates that the battery is charging, while “STDBY” indicates that the battery is fully charged. Its comprehensive configuration greatly meets the needs of users in DIY creation.
2.Features
The expanded pins can be configured as:
3 PWM outputs
1 pair of UART serial transmission and reception
1 SPI bus (P13-P15)
1 I2C bus (P19-P20)
P3, P4, P6, P7, P9, P10 are used for controlling the LED screen on the controller board
P5, P11 are used for controlling the A and B buttons on the controller board
3.Specifications
Size：78.4mm*44mm
Weight：30.2g
