I recently needed to add SLAM visualization to QGroundControl. The plan: render a map using a simple graphics library, then encode the output via H.265. That’s how I stumbled into writing TinyGPU—and it quickly became my new favorite tool for lightweight embedded graphics. TinyGPU is a lightweight, header-only C++ library Read more
Working with the ESP32-S3 has always been about pushing boundaries—especially when it comes to multimedia. While audio on microcontrollers has become fairly common, video is still considered “out of reach” for most embedded setups. That’s what makes the lightweight H.264 support from Espressif Systems so interesting. Native H.264 Support on Read more
I am getting old and usually forget the commands that I rarely use. My solution for this: Just ask AI ! Lately I was running into the issue that my ESP32 Arduino test sketches were crashing because there was not enough stack, but this time ChatGPT completely failed me. I Read more
IEEE 802.15.4 is a technical standard defining the Physical and Media Access Control layers for Low-Rate Wireless Personal Area Networks. It enables low-power, low-data-rate wireless connectivity for IoT, smart home, and industrial sensors, allowing devices to operate on batteries for years. Here in Europe it uses the Primary Sub-GHz Band: 868.0–868.6 Read more
Recently I found the ESP32‐S3 AI Smart Speaker Development Board on Aliexpress for around 15 USD. It has quite some interesting functionality: ES8311 Codec DAC Chip ES7210 Codec ADC Chip with stereo microphones SD Card 6 Neopixel Multicolor LEDs A PCF85063A Real Time Clock 3 User Definable Keys GPIO interface Read more
In my last blogs, I was showing how to create DLNA devices. In my final blog about this topic I will demonstrate how to create a DLNA Control Point (=Client) which uses the functionality of these devices. I will demo a simple Control Point for a Media Renderer which will Read more
After having demonstrated how to implement a DLNA Media Renderer in the last blog, I show that it is equally simple to define a DLNA media server. Here is the outline of a basic sketch: The logic for setting up and starting a server is basically the same like the Read more
I was searching for the most efficient generic way to process the whole SD directory tree in Arduino: this can be helpful if you want to search for files or if you want to store the whole file system in a tree in RAM. The Standard SD API Way When Read more
Im my last blog I was describing the DLNA Architecture. So we are ready now to dig into my first Arduino DLNA Sketch. By combining my arduino-dlna with the arduino-audio-tools library it is quite easy to build a Network Audio Renderer that can e.g. be controlled via an Android Application: Read more
The major advantage of the DLNA architecture is it’s clear separation of concerns. This split into specialized roles allows developers to create focused, efficient devices that, when combined, form a sophisticated whole-house audio system. The architecture is built around three core components: Media Servers, which store and distribute (e.g. audio) Read more