Fish tanks
Dissolved oxygen, temperature, pH and turbidity are visible for each tank, with quick access to tank detail and recent trends.
CrowPanel ESP32-P4 Application Demo
Recirculating Aquaculture System Control HMI
Fish tanks, water treatment, oxygenation, water quality, trends and alarms on one 10.1-inch CrowPanel.
Demo
A complete RAS on one local HMI
This application demonstrates how monitoring and control for a recirculating aquaculture system can be organized on a compact local touchscreen — from overall plant status to individual tanks, treatment equipment, water quality and alarms.
The main screen keeps the whole water loop visible. The operator sees four fish tanks on the supply manifold, the treatment chain in flow order, main and backup oxygenation, active alarms and the current chemistry of the loop.
Everything is designed for direct touch operation. From the overview, the operator can open a tank or subsystem, inspect live values and trends, and move to the part of the process that needs attention.
The demo is fully self-contained on the panel, so it can be used to evaluate the HMI concept without a PLC, external sensors or a network connection.
The HMI brings together:
- ✓Fish tanks and tank-level water parameters
- ✓Drum filtration, biofilter, ozonation, degassing and UV
- ✓Main and backup oxygenation
- ✓Loop water quality and operating limits
- ✓Trends, warnings and alarm history
- ✓Operator test scenarios for abnormal conditions
System scope
One HMI for the complete RAS
The interface follows the physical process: fish tanks feed into the same treatment and oxygenation loop, so the operator can understand the plant as one connected system rather than a collection of isolated values.
Fish tanks, filtration, biofilter, UV, ozonation, degassing and oxygenation shown as one connected recirculating aquaculture process.
Water treatment
The treatment chain stays in process order, with the state, efficiency and relevant operating parameters of each unit.
Oxygen & water quality
Main and backup oxygenation, loop chemistry, thresholds and trends are available without leaving the plant context.
Operator workflow
From plant overview to the detail that matters
The operator can move through Overview, Tanks, Treatment, Oxygen, Quality, Trends and Alarms depending on the task, while the top bar keeps overall plant state and active alarms visible.
Tanks shows the live condition of all four tanks. A tank can be opened for larger values, 15-minute sparklines and alarms related to that tank.
Treatment follows the five treatment units in flow order and exposes the parameters relevant to each stage, such as drum-filter differential pressure, biofilter nitrification and UV intensity.
Trends adds recent history and threshold lines, helping the operator understand how a parameter reached its current state rather than seeing only a single number.
Fish Tanks — four tanks, live values and 15-minute dissolved-oxygen history on one screen.
Fault scenarios
See a problem develop — and see the plant respond
The demo includes four predefined fault scenarios built in specifically to show how a real RAS HMI can behave when something goes wrong. Start a scenario on the panel and watch the condition develop through warnings and alarms, follow the affected part of the process, and see how the system can respond automatically — for example by engaging Backup O₂ when dissolved oxygen falls too low.
Built-in fault demos — start a condition and follow the HMI through warning, alarm, automatic response and recovery.
Example: in the Low Dissolved Oxygen scenario, Tank 2 drops through warning and alarm thresholds. Backup O₂ activates automatically, dissolved oxygen begins to recover, the alarm clears and the plant returns to normal operation.
Alarms & process history
Normal stays quiet. Problems stand out.
The visual language follows the ISA-101 principle used in industrial HMIs: normal operation stays calm and gray, while amber, red and magenta are reserved for warnings, alarms and equipment faults.
Alarm history — every raise and clear is recorded with time, source, severity and state.
Active alarms remain visible at the top of the system and can be opened directly from the alarm counter.
The Alarms screen keeps the record of what happened and when. Trends show the recent process history together with warning and alarm guide lines, giving the operator the context behind the current state.
This keeps the normal plant visually quiet while making abnormal conditions easy to recognize and trace.
Connectivity
Wired and LoRaWAN
For a real installation, the HMI can combine traditional interfaces to local equipment with wireless measurement points and local controllers distributed around the site.
Wired
Local equipment interfaces
Modbus, analog and other traditional interfaces can connect pumps, treatment equipment and local controllers to the HMI.
LoRaWAN
Distributed sensors and controllers
Wireless nodes can carry measurements, equipment status and alarms, as well as confirmed commands such as Start/Stop, Auto/Manual and setpoints.
Run the RAS Control HMI on CrowPanel ESP32-P4
The package includes a one-click Windows flashing tool with the demo firmware built in. Connect the panel through the UART0 USB-C port, run the tool and the CrowPanel restarts directly into the RAS demo.
From demo to deployment
Use the concept as a starting point for a real RAS
For this standalone demonstration, the process itself is simulated on the panel so the complete HMI can be evaluated without external hardware. The operator interface, alarm engine, trends and backup-oxygenation logic shown here are implemented in the application.
For a real installation, the same HMI structure can be connected to actual plant data through Modbus, analog inputs or LoRaWAN field devices and adapted to the specific RAS layout, equipment and operating rules.
The goal of the demo is to show how a complete aquaculture process can be presented on a compact local HMI before committing to the final hardware and field integration.
A production version can be adapted to:
- ✓Your tank and treatment layout
- ✓Your sensors and measured parameters
- ✓Your operating limits and alarm logic
- ✓Your equipment controls and local controllers
- ✓Your wired and wireless interfaces
- ✓Your UI, branding and operator workflows
Need a Similar HMI for Your Aquaculture System?
We can adapt the CrowPanel-based HMI to your tanks, treatment process, sensors, alarms, controls and required interfaces.
Application demo for Elecrow CrowPanel Advance 10.1" ESP32-P4