Category Archives: HOW-TO

Socket to ’em

Posted on 2025-07-07 by M. Eric Carr

TCP and UDP sockets can enable Internet-aware programs to communicate directly with each other… Continue reading →

Posted in C, Coding, Digital, Digital Citizenship, HOW-TO, Internet, Linux, Networking, System Administration | Leave a comment

TTGO T-Display Deep Sleep

Posted on 2022-12-26 by M. Eric Carr

10mA isn’t an acceptable sleep current. Here’s how to put the TTGO to sleep. Continue reading →

Posted in Arduino, C, Coding, Digital, HOW-TO, Power | Leave a comment

Quadrature Encoders

Posted on 2022-06-30 by M. Eric Carr

Quadrature rotary encoders are inexpensive and very easy to wire up. Here’s how to use them with interrupts in Arduino C for ESP32. Continue reading →

Posted in Arduino, Building blocks, Digital, Electronics, HOW-TO, User Interface Design | Tagged , , , , , , , , , , , , | Leave a comment

Wireless Sketch Updates for ESP8266

Posted on 2021-07-18 by M. Eric Carr

Here’s how to use the Arduino IDE to program ESP8266 boards over WiFi. Continue reading →

Posted in Arduino, C, Digital, HOW-TO, Internet, Networking | Tagged , , , , , , , , | Leave a comment