PicoSens is a compact, Wi-Fi-enabled monitoring system designed for industrial environments. It interfaces with industry-standard 4–20 mA current loop sensors to measure critical parameters like temperature, pressure, flow, and current. Using a Raspberry Pi Pico W, PicoSens provides real-time data visualization via a responsive web dashboard, logs historical readings, and supports configurable alerts to detect anomalies and prevent equipment failure.
Ideal for remote monitoring, diagnostics, and preventive maintenance in:
- HVAC systems: Monitor air temperature, pressure, or flow
- Data centers & server rooms: Track thermal and humidity conditions
- Electrical infrastructure: Supervise transformer temperature or breaker currents
- Industrial automation: Check line pressure or tank levels on the factory floor
- 4–20 mA Sensor Interface: Read analog signals using precision current-to-voltage conversion and onboard ADC
- Wi-Fi-Enabled Dashboard: Hosted on the Pico W, accessible from any device on the network
- Live Data Visualization: Dynamic charts via Chart.js to monitor trends in real time
- Sensor Calibration & Conversion: Easily map sensor current values to engineering units (e.g., °C, PSI, L/min)
- Threshold Alerts: Set min/max thresholds to receive immediate notifications via web interface or webhook
- Data Logging: Save timestamped readings to CSV files on internal flash or SD card for analysis and reporting
- Mobile-Friendly Interface: Works seamlessly on smartphones, tablets, and desktops
| Component | Purpose |
|---|---|
| Raspberry Pi Pico W | Wi-Fi-enabled microcontroller for processing & hosting |
| 4–20 mA Sensor | Industrial sensor (e.g., temperature, flow, pressure) |
| 165 Ω Precision Resistor | Converts current signal to readable voltage for ADC |
| Power Supply (e.g., 24 V) | Powers sensor current loop |
| (Optional) TVS Diode / Op-amp | Protects ADC from voltage spikes/noise |
| (Optional) SD Card Module | Enables high-capacity long-term data logging |
- Cloud integration (e.g., MQTT or HTTP push to cloud dashboards)
- Remote firmware updates
- Multi-sensor support with dynamic channel selection
- Enclosure and power supply integration for rugged deployments