Hi there,
And Welcome here,
So there are more examples, in the IDE you can look at SCCMA and glean some info, connections for SPI, I2C, and others. Serial also.
What type of errors do you get ?
What is your dev environment ?
After a few reply’s you’ll gain enough forum credz to post links, pics, etc.
Not sure which end you start with, the Wio-terminal or the GVAIM2 
They both have UART and I2C so my guess would be one of those two.
HTH
GL 
PJ 