Adafruit’s HUZZAH32 Feather board is built with the official WROOM32 module: Two CPU cores that can be individually controlled, and the CPU clock frequency is adjustable from 80 MHz to 240 MHz 448 kB of ROM for booting and core functions. 520 kB of on-chip SRAM for data and instructions. 8 kB of SRAM in RTC, […]
Installing an SSL Certificate on Tomcat
If you have Tomcat installed on your Mac or Linux computer, like I have shown here and here, you may sooner or later want to serve content not only through HTTP, but also securely through HTTPS. Instead of going the self-signed certificate route, where the certificate is signed with its own private key, I’m describing […]
Emotion Lamp
The idea behind the Vocal-Emotion Lamp is rather simple: to use a small affordable computer that can continually recognize emotion from the human voice and then visualize the result of the analysis, effortlessly and enjoyably. The implementation of this idea uses the small and inexpensive Raspberry Pi computer, extended with a far-field microphone expansion board. The software that performs […]
Custom wakeup-words for an Android app
With most modern Android phones, just saying the phrase “OK Google” will launch the Google assistant app, which is capable of answering simple questions, or functioning as a app launcher. Following up with “open g mail” will launch the Gmail app on your phone, or saying “navigate home”, will open the Google Maps app, with […]
Serverless compute with Java, on AWS Lambda
Serverless computing is a cloud computing execution model, in which the cloud provider dynamically manages the allocation of machine resources. Serverless computing allows running applications and services, without thinking much about servers, runtime resources, or scaling issues. A very simple serverless computing application is intended to be used as a template project, a model, or starting […]