PCB Design Bluetooth ADC

Job ID: 37538345

Budget: $10 – $30 USD

I need a PCB design and parts suggestions for my project, with the following requirements:
- Reliable measurement of Velostat resistance, without significant noise.
- Bluetooth communication capability.
- Powered by a USB cable.
- Smaller size compared to the prototype.

I currently have a working prototype (ESP32 + external ADC because there is too much noise on the ESP32 ADCs), but I need a smaller solution with a custom PCB.