Edited by Tido at Feb 21, 2016 20:15 |
I don't know about the difference between ANDROID and Linux, I only use Linux (Lemuntu).
There is a user manual and in chapter 8 it says:
There are 40pins for GPIO on LeMaker Guitar Base Board Rev. B,
including TWI, PWM, SPI, I2C, UART, etc....
Via the basic way, you can control the digital ports input or output from the sys user space.
About the voltage I have no clue, did you search the forum?
Can you say what you want to read out from the UART, logging the boot process?