Summary

In this chapter, we have learned how to write messages to the serial port and how to configure PuTTy to monitor messages on the serial port. We have then used this knowledge to output keypresses on a keypad that we controlled using a driver that we wrote. During that procedure, we learned how to write drivers for devices that currently have no official drivers and also learned about the contribution process of the driver's repository from TinyGo.

Then we learned how to control a servomotor and wrote a library to do so. As the last step, we combined everything we learned in this chapter to build a safety lock that accepts a passcode to open up the lock. This knowledge can be very useful if you ever want to build a door lock or a flight control system, where you need to control servomotors. The keypad can also be used as a gamepad, where you use the keys as input. As a bonus, we also wrote two drivers that we can reuse in all upcoming projects after finishing the book...