A low cost DIY sound pressure level sensor for use by laymen; the result of my master’s thesis. It allows integration into the existing senseBox framework but can also function on its own. It’s merely a prototype and there obviously is room for improvement.

• Uses a STM32G071 (ARM Cortex-M0+)
• Uses a Knowles I²S MEMS microphone
• Uses a RFM95 LoRa module (not in WAN mode)

This repository includes

• STL files for the case
• Schematic and PCB layout files
• STM32 code for the G071 microcontroller
• An Arduino library to be used with the senseBox MCU
• An ESP32 library to be used as an alternative to the senseBox MCU

Link to the more detailed article