- esp32-s3 module
- 4 layer design signal / gnd / gnd / signal
- esp32-s3 module
- 4 layer design signal / gnd / gnd / signal
- best ADC chip available
- figure out how to support the widest variety of inputs
- tank senders + voltage dividers
- Relay board - DC or AC?
- Motor driver / H bridge?
- manual OTA upload
- learn about building components for node-red, maybe make a yarrboard toolkit