Where can I find information about using the GrovePi+ onboard serial port? Everything I’ve seen about connecting two serial sensors involves a usb converter. What is the point of the second uart if I can’t use it? Is it possible to use that port as D1 instead?
Raspberry only have one hardware Uart and GrovePi+ do not support Software Uart. So you can visit websit that can help you to learn how to use Software Uart.https://github.com/themrleon/RpiSoft-UART
