Profiling Float Project

An ESP32-based automated profiling float system for water measurements using MS5837 pressure/temperature sensor.

Hardware Requirements

• ESP32 Development Board
• MS5837 Pressure/Temperature Sensor
• Stepper Motor
• 2x Limit Switches
• HC-SR04 Ultrasonic Sensor
• Power Supply
• Waterproof Housing

Pin Connections

Sensor Connections

• MS5837 SDA → GPIO21 (D21) [WHITE cable]
• MS5837 SCL → GPIO22 (D22) [GREEN cable]

Stepper Motor

• Direction Pin → GPIO5 (D5) (BLUE)
• Step Pin → GPIO4 (D4) (GREEN)

Buttons/Switches

• Bottom Limit Switch → GPIO13 (D13) (Button TOP)
• Top Limit Switch → GPIO14 (D14) (Button Bottom)

WiFi Setup

The device creates an Access Point with:

• SSID: SSCFloat
• Password: DT1234dt
• IP Address: 192.168.4.1

Web Interface

• /data - View pressure and temperature readings
• /control - Control stepper motor sequence

Operation

1. The float performs continuous pressure/temperature measurements
2. Motor sequence can be triggered via web interface
3. Sequence includes:
   • Descent until bottom limit switch
   • Wait for float detection via ultrasonic sensor
   • 45-second measurement pause
   • Ascent until top limit switch

Development

Built using Arduino IDE or PlatformIO. Required libraries:

• MS5837
• WiFi
• WebServer
• Wire
• ArduinoOTA
• Update

OTA Updates

Supports both ArduinoOTA and web-based OTA updates for easy firmware deployment. Can use WIFI to flash onto the ESP32 through connecting to it's WIFI