A home wi-fi thermostat with a Raspberry PI-3 with LCD screen and an ESP8266 measuring the room temperature wireless.

Play mp3 files from SD via I2S

My own axi-gpio driver on xilinx zynq device

Red Pitaya Ecosystem and Applications

LoRa ESP32 KISS Bluetooth modem (for APRSDroid or aprs.fi iOS) + APRS-IS RX/TX iGate over WiFi + Digipeater + DV (with Codec2 Walkie-Talkie)

Python client to interact with Janus Gateway.

Arduino library to play MOD, WAV, FLAC, MIDI, RTTTL, MP3, and AAC files on I2S DACs or with a software emulated delta-sigma DAC on the ESP8266 and ESP32