SparkPal is another fun personal project that I sniffed the Bluetooth data between the Positive Grid Spark amp and its mobile app, and created this physical pedal that mimics the control commands sent by the app. This can be connected to the PG Spark amp, and allows users to change preset 1-4 by tapping Up/Down, and turn individual Drive/Mod/Delay on/off by tapping its individual switch, to provide a much more user friendly and flexible approach to change tones. It also includes the battery and charger in design so can be used 100% wirelessly.

Technologies:

• ESP32 + Arduino
• RPI_Zero_W + NodeJS