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In Part 1 of this article series, I tested and reviewed Seeed Studio’s SenseCAP K1100 Kit for prototyping IoT apps. This month in Part 2, I discuss the prototype I built using a Wio Terminal and a Vision AI Module from the kit, and an ESP32-based audio player/web server. The system detects when my dog tries to “mark territory” in my yard, then plays an audio warning file of my recorded voice to try to distract the dog and stop the behavior.

Many unexpected issues come into play when you move from the real world of analog signals and enter the world of digital signal processing (DSP). Part 2 of this article series charges forward introducing “Murphy’s Laws of DSP” #7, #8 and #9 and looks at the spectral analysis of DSP signals.

Implement high-bandwidth and low-latency SPI communication between a PIC32 and an OV7670 camera module to better utilize the performance and processing speed of the microcontroller by reducing unnecessary computational loads.