Combine sensors into multi sensor devices to reuse esp32 MCUs

[mgrouch]

Proposal

AtomS3-lite engine:

• RPM via alternator W terminal pulse counter with optocoupler
• Oil pressure (with ina219) resistance based sensor
• Engine temperature (Dallas temperature sensor)
• Exhaust temperature (Dallas temperature sensor)
• Fuel level (resistance based?)
• Fuel flow?
• Rudder position (Hall effect based or resistance/potentiometer)
• Flame detector
• Gas sensors

AtomS3-lite environment:

• i2c sensors (air pressure/temp/humidity, illuminance, UV level, TVOC, lightning strikes detection)
• GPS
• Human presence, motion detection
• Rain sensor
• Dust sensor
• Fridge temperature
• Carbon Monoxide
• Smoke detector

AtomS3-lite or Atom-Lite alarms and electrical:

• Battery Voltage
• Battery Temperature
• H2 gas
• Bilge level with JSN-SR04T Distance Measuring Ultrasonic Waterproof Sensor Module, Range Sensor
• Alarm via WhatsApp with Ethernet module

Atom-lite or atomS3-lite fluids levels:

• Black water (current loop based sensors)
• Grey water
• Fresh water
• Lubricant
• Water quality sensor
• Fridge temperature (1-wire Dallas)

AtomS3 with built-in IMU:

• Heave
• Rate of turn

or
AtomS3R with built in IMU and magnetometer:

• Compass
• Heave
• Attitude
• GPS
• Rudder angle
• Rate of turn
• Magnetic variation for location and date
• Sunset/Sunrise

use m5stack PortABC base for connections