Welcome to my Electronics Blog!
In this blog entry, I will introduce my IO uHat for the Raspberry Pi Zero 2W. This particular uHat provides: The IO uHat also hosts an I2C EEPROM as per the uHat specification. The configuration of this EEPROM will be covered in a future entry. The schematic is shown below: Both the GPIO expander and…
This blog entry demonstrates how to interface an HD44780 character LCD to a Raspberry Pi Zero 2W, using Linux kernel drivers. This approach should also work on other Raspberry Pi single-board computers. Configure and load the HD44780 kernel module at boot First, you’ll need to load the correct HD44780 Linux kernel module. This will only…
A couple of months ago, I decided to pursue few IOT project ideas that could benefit from basic UDP (User Datagram Protocol) communication. The MQTT and CoAP protocols are definitely more robust and secure. But there are some situations where the basic UDP protocol is sufficient. The POSIX C socket API built into Linux is…