AabNex SMS — Smart Solar Tubewell VFD Control with SMS, Button and Webpage
AabNex SMS is a commercial solar tubewell VFD controller developed by Arduino Expert for farmers, solar installers, dealers, and agricultural water users who need reliable tubewell control without depending on internet, mobile apps, or cloud subscriptions.
The device is designed with an SMS-first architecture for field reliability. Users can send simple SMS commands to start and stop the tubewell, check status, view VFD parameters, read fault information, reset allowed faults, enable dry-run protection, manage solar restart behavior, set service reminders, and view runtime/session information.
AabNex SMS is not limited to SMS only. It also supports local button control and local AP Mode Hotspot webpage control. This means the tubewell can be controlled remotely through SMS or locally at the site using the device button or built-in hotspot webpage.
The controller communicates with supported VFDs through RS485/Modbus, allowing it to read actual VFD status and important operating parameters such as frequency, current, voltage, DC bus voltage, power/load data, runtime, fault status, and fault codes, depending on VFD compatibility.
Why AabNex SMS?
Many solar tubewell users still depend on manual operation or basic controllers. Farmers often have to visit the tubewell site to start the pump, stop the pump, check whether the motor is running, or understand why the VFD has stopped.
AabNex SMS solves this problem by giving the user practical control and monitoring through normal mobile SMS, while still offering local button and hotspot webpage control at the site.
AabNex SMS is ideal for:
- Farmers who want remote tubewell control
- Farmers who want a low-cost one-time device solution
- Farmers who do not want monthly cloud charges
- Areas where mobile internet is weak, unavailable, expensive, or not preferred
- Users who do not want to depend on a mobile app
- Solar tubewell systems using VFDs
- Dealers and installers who need a practical field-ready controller
- Farmers who sell water by the hour and need runtime/session information for manual calculation
Developed by Arduino Expert
AabNex SMS is designed and developed by Arduino Expert as a commercial field device for solar tubewell VFD control.
The product is built for practical agricultural use, with focus on:
- SMS reliability
- Local button control
- AP Mode local web control
- RS485/Modbus VFD communication
- Confirmed ON/OFF feedback
- Fault monitoring
- Protection logic
- Predictive maintenance alerts
- Installer-friendly operation
AabNex Device Features
1. Multiple Control Methods: SMS, Button and AP Mode Webpage
AabNex SMS supports multiple control methods for real field conditions.
| Control Method | Purpose |
|---|---|
| SMS Control | Remote ON/OFF, status, fault info, VFD parameters and protection commands |
| Local Button Control | Physical ON/OFF operation at the device or control panel |
| AP Mode Webpage Control | Local webpage control and setup through device hotspot without internet |
| RS485/Modbus VFD Control | Actual VFD command, feedback, parameter reading and fault monitoring |
2. SMS Remote Control
AabNex SMS allows the user to control the tubewell from an authorized mobile number through simple SMS commands.
Common commands include:
-
ONOFFSTATUSVFD STATUSFAULT INFOGSMDRYRUN ON/OFFSOLAR ON/OFFSERVICE?
SMS control is useful when the farmer is away from the Tubewell site and wants to start, stop, check, or diagnose the system remotely.
3. Local Button Control
AabNex SMS supports local button ON/OFF control.
This is useful when:
- The farmer is already present near the tubewell
- The technician is testing the installation
- SMS delivery is delayed
- Quick local operation is required
- The user wants physical panel control
Button operation follows the device logic and VFD control process.
4. AP Mode Hotspot Webpage Control
AabNex SMS includes a local web control page through AP Mode Hotspot.
The user or technician can connect to the device hotspot from a mobile phone and open the local webpage. This does not require internet.
The AP Mode webpage can show and control:
- Tubewell ON/OFF
- System status
- Runtime information
- VFD status
- VFD parameters
- GSM signal check
- Timer
- Schedule
- Protection settings
- Authorized numbers
- Recent event log
- Service/protection status
Important note:
AP Mode is local hotspot control near the device. It is not cloud/app control. For internet-based app monitoring and full Khata, customers should use AabNex IoT.
5. RS485/Modbus VFD Communication
AabNex SMS communicates with supported VFDs through RS485/Modbus.
This allows AabNex SMS to do more than simple relay switching. It can send control commands, read VFD status, monitor operating data, and identify fault conditions directly from the VFD.
Depending on VFD compatibility, AabNex SMS can support:
- VFD run command
- VFD stop command
- Actual running status
- Fault status
- Fault code reading
- Frequency setting
- Output frequency
- Reference frequency
- Output voltage
- Output current
- DC bus voltage
- Motor speed
- Power/load data
- Torque/load data
- Estimated energy
- Communication status
Compatibility depends on the VFD model, Modbus register map, parameter settings, and installation configuration.
6. VFD-Confirmed ON/OFF Feedback
AabNex SMS does not only send an ON or OFF command. It checks the actual VFD feedback through RS485/Modbus and confirms whether the tubewell is actually running or stopped.
This is a major advantage over simple relay-based controllers.
Example:
AabNex: TubeWell ON confirmed.
AabNex: TubeWell OFF confirmed.
This helps the user know whether the command was actually executed by the VFD.
7. VFD Parameter Monitoring
AabNex SMS can read important VFD parameters through RS485/Modbus and show them through SMS and AP Mode webpage, depending on VFD compatibility.
Important VFD parameters may include:
- VFD communication status
- Actual tubewell ON/OFF status
- Output frequency
- Reference frequency
- DC bus voltage
- Output voltage
- Output current
- Motor speed
- Power/load percentage
- Torque/load percentage
- Real power estimate
- Energy estimate
- Fault code
- Fault title
- Fault description
- Fault action suggestion
This helps the user and technician understand the actual operating condition of the tubewell system.
Use this line on the product page:
AabNex SMS can read and display key VFD parameters such as current, voltage, frequency, status, fault data, DC bus voltage, power/load and energy estimate through RS485/Modbus, depending on VFD compatibility.
8. Fault Information by SMS
The user can request VFD fault information by SMS.
Example command:
FAULT INFO
This helps the farmer or technician understand why the tubewell stopped.
Fault information can include:
- Current fault code
- Fault title
- Simple or critical fault category
- Fault counters
- VFD status
- Suggested action
- Daily/monthly fault count
This reduces unnecessary site visits and improves field troubleshooting.
9. Simple and Critical Fault Reset Modes
AabNex SMS supports separate behavior for simple faults and critical faults.
Supported commands include:
RESET FAULT ONRESET FAULT OFFRESET CRITICAL FAULT ONRESET CRITICAL FAULT OFF
This allows safer fault handling.
Simple Fault Mode
Used for non-critical faults where automatic reset/restart may be acceptable depending on configuration.
Critical Fault Mode
Used for serious faults where the system should be more careful before repeated restart attempts.
This separation helps protect the VFD, motor, pump and wiring from unsafe repeated restarts.
10. Dry-Run / No-Water Protection
AabNex SMS supports dry-run / no-water protection using VFD current feedback and configured threshold values.
Commands include:
DRYRUN ONDRYRUN OFFDRYRUN SET
Dry-run protection can help protect the pump when water is not available or motor load becomes abnormally low.
Dry-run threshold must be configured properly during installation according to the actual motor, pump and VFD behavior.
11. Solar Low-Voltage Restart Control
Solar tubewell systems may stop when solar voltage becomes low due to clouds, weak sunlight, unstable PV input, or morning/evening voltage conditions.
AabNex SMS supports solar low-voltage restart behavior.
Commands include:
SOLAR ONSOLAR OFF
This helps the tubewell restart safely when solar power becomes stable again, depending on configuration and VFD condition.
12. Power-Loss Auto Restart
AabNex SMS supports power-loss auto restart control.
Commands include:
AONAOFF
When enabled, the system can restart after power recovery if the tubewell was previously running, depending on configuration and safety conditions.
This is useful for solar tubewell systems where power availability changes during the day.
13. Timer Operation
AabNex SMS supports timer-based operation.
The user can set a timer through SMS, for example:
T1512
This means the tubewell can be configured to run for a specific duration.
Timer use cases:
- Run tubewell for fixed irrigation time
- Avoid forgetting the motor ON
- Support hourly water-selling calculation
- Prevent unnecessary runtime
Timer function can also be available through the AP Mode webpage, depending on configuration.
14. Schedule Operation
AabNex SMS supports schedule-based operation through SMS and AP Mode webpage.
Supported schedule types may include:
- Daily schedule
- Date-specific schedule
- Schedule status
- Schedule clear
Example commands:
SCH,DAILY,09:00,11:00
SCH,DD-MM-YYYY,09:00,11:00
SCHSTATUS
SCHCLEAR
Schedule feature helps automate regular tubewell operation according to irrigation timing.
15. Runtime and Session Information
AabNex SMS provides runtime and session information.
Runtime data may include:
- Current session runtime
- Lifetime runtime
- Daily runtime
- Monthly runtime
- Timer runtime
- Schedule runtime
- Run reason: SMS, Web, Button, Timer, Schedule or Auto-Restart
This is useful for:
- Farmer record keeping
- Manual water-selling calculation
- Service interval tracking
- Fault analysis
- Dealer/technician diagnostics
Important Khata note:
AabNex SMS provides runtime/session information that helps farmers manually calculate water-selling hours. Full customer-wise Khata, hourly billing, payment tracking, balance records and cloud reports are available in AabNex IoT.
16. Event Log
AabNex SMS includes an event log focused on important operational events.
The event log can record:
- Confirmed ON events
- Confirmed OFF events
- VFD fault events
- Event source: SMS, Web, Button, Timer, Schedule, Auto-Restart or VFD
- VFD status
- Output frequency
- Current
- Fault code
- Daily runtime
- Monthly runtime
- Daily/monthly fault counters
This helps with troubleshooting and commercial service support.
17. Service Reminder System
AabNex SMS supports runtime-based service reminders.
Commands include:
SERVICE?SERVICE SETSERVICE RESET
This feature helps remind the user or technician about preventive maintenance.
Service reminders may be used for:
- Pump inspection
- Motor inspection
- Solar panel cleaning
- VFD panel cleaning
- Cooling fan/filter inspection
- Wiring and terminal tightening
- General preventive maintenance
18. Predictive Maintenance Alerts
AabNex SMS can use VFD fault data, runtime data, current readings, voltage behavior and repeated fault events to generate early warnings.
Predictive maintenance can help identify:
- Repeated VFD faults
- Abnormal motor current
- Low-load / dry-run pattern
- Repeated low-voltage events
- RS485 communication loss
- Excessive fault reset attempts
- Service due condition
- Unusual runtime behavior
This helps farmers and technicians take action before small problems become expensive motor, pump or VFD failures.
Marketing line:
AabNex SMS does not only control your tubewell — it watches important VFD data and helps warn you before small issues become major failures.
19. GSM Signal Check
AabNex SMS includes GSM signal checking.
Command:
GSM
This helps the technician or user verify mobile network signal at the installation site.
The external antenna should be installed where GSM signal is stable.
20. Authorized Number System
AabNex SMS supports controlled access through authorized mobile numbers.
User roles include:
| Role | Purpose |
|---|---|
| Super Master | Highest-level control, can block/unblock device |
| Master | Main user/owner control |
| Authorized Numbers | Additional allowed users/operators |
This helps prevent unauthorized control.
21. Super Master BLOCK/UNBLOCK
AabNex SMS supports Super Master BLOCK/UNBLOCK control.
Commands include:
BLOCKUNBLOCK
This can be useful for:
- Security control
- Dealer/owner protection
- Preventing unauthorized use
- Stopping the system in special situations
- Restricting access when required
When blocked, operation is restricted according to device logic.
22. AP and Web Security
AabNex SMS supports AP/web password configuration.
Admin commands can allow:
- AP password change
- Web password change
- Wi-Fi AP enable/disable
- Device restart
- Master number update
- Authorized number update
These are advanced features and should normally be handled by the owner, dealer or technician.
23. SMS-First Reliable Firmware Architecture
AabNex SMS firmware is designed with SMS priority.
The system is built to give priority to:
- Incoming SMS reading
- Command processing
- Short SMS replies
- Outgoing SMS retry handling
- Final ON/OFF confirmation messages
- Critical alerts
This improves reliability in real GSM field conditions where SMS delays and weak network behavior can occur.
Benefits for Farmers
- Start and stop tubewell remotely
- Save travel time and fuel cost
- Operate through simple SMS
- Use local button when present at the site
- Use AP Mode webpage locally without internet
- No mobile app required
- No internet required for SMS or AP Mode control
- No cloud subscription
- Receive confirmed ON/OFF feedback from VFD
- Check current, voltage, frequency and VFD status
- Receive fault information remotely
- Use runtime information for manual water-selling calculation
- Get service reminders
- Improve protection against dry-run, faults and solar voltage issues
Benefits for Solar Installers
- Add commercial value to solar tubewell installations
- Offer smarter control than basic relay systems
- Diagnose VFD status and faults remotely
- Check key VFD parameters
- Reduce repeated site visits
- Improve after-sales support
- Offer a practical upgrade for existing VFD tubewell systems
- Use AP Mode webpage during installation and testing
Benefits for Dealers
- Strong agricultural market demand
- Easy to explain to farmers
- Suitable for cost-sensitive customers
- No cloud subscription objection
- Clear upgrade path to AabNex IoT
- Good opportunity for installation/service income
- Professional Arduino Expert commercial product
- Dealer training and support can be offered
AabNex SMS vs AabNex IoT Comparison
| Feature | AabNex SMS | AabNex IoT |
|---|---|---|
| Remote Control | SMS | Mobile app/cloud |
| Local Button Control | Yes | Yes |
| AP Mode Local Webpage | Yes | WiFi |
| Internet Required | No | Yes |
| Mobile App Required | No | Yes |
| Cloud Subscription | No | Yes |
| VFD ON/OFF Feedback | Yes | Yes |
| VFD Parameter Monitoring | Yes | Yes |
| Fault Alerts | SMS alerts | App/cloud alerts |
| Dry-Run Protection | Yes | Yes |
| Solar Restart Control | Yes | Yes |
| Predictive Maintenance | SMS-based alerts | Advanced app/cloud alerts |
| Runtime Information | Yes | Yes |
| Full Khata Record Keeping | Manual calculation support only | Full customer-wise Khata |
| Customer Ledger | No | Yes |
| Payment Tracking | No | Yes |
| Cloud Reports | No | Yes |
| Best For | Affordable remote control without internet/cloud charges | Premium app control, cloud monitoring and full Khata |
Contact Us for more Information
WhatsApp +92 331 7564344
Email: info@arduinoexpert.com
Address: Abbasia Banglows, Rahim Yar Khan, Pakistan
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