Smart Water Pump Controller

Title: Remote Web-Based Pump Automation Controller — Multi-Protocol, IoT-Enabled
I need a remote, web-based automation controller for pump systems, supporting centralized monitoring and control of multiple electrically operated devices (pumps, motorized valves, and other electromechanical instruments).
Core functionality:
Automatic and manual modes — automatic mode operates on configurable logic (sequences, schedules, grouping, conditional control based on sensor thresholds); manual mode gives direct on/off override via switch or web/app interface, regardless of sensor state
Remote configuration, monitoring, and operation of all connected devices through a secure cloud/server platform
Sensor and communication interfaces:
Modbus RTU/RS485 input ports for field sensors — pressure sensors, level transmitters, flow meters, temperature sensors
Modbus output interface for integration with BMS/SCADA systems
At least one 4–20 mA analog input channel for industrial-grade sensors/transmitters
LoRa wireless receiver module (865–868 MHz band) for long-range, low-power communication with wireless sensors
Built-in IoT SIM-based GSM/4G module for cloud connectivity, real-time data transmission, remote diagnostics, firmware updates, and alarm notifications
Relay/output requirements:
Multiple relay outputs, industrial-grade, rated for reliable long-term switching of pumps, motorized valves, and actuators
On-site interface:
Integrated LED/LCD display showing device status, communication status, sensor readings, alarms, relay status, and diagnostics
Enclosure:
Powder-coated MS sheet, IP65-rated, suitable for outdoor/field deployment
Scope of work:
Recommend the right microcontroller architecture to support the above (Modbus, LoRa, GSM/4G, analog input) — open to your recommendation on chip/module selection
Full schematic and PCB design (KiCad or Altium — editable format required)
Well-commented firmware covering automatic control logic, manual override, Modbus communication, LoRa receiver handling, and GSM/4G cloud connectivity
Wiring and calibration documentation for on-site commissioning by a competent electrician/technician
Acceptance criteria:
With simulated sensor signals, the pump starts/stops correctly per configured logic and locks out on abnormal readings
Manual override instantly energizes/de-energizes connected devices regardless of automatic logic state
Modbus, LoRa, and GSM/4G communication all function and report correctly to a test server/dashboard
Display shows accurate real-time status and diagnostics
Documentation is complete enough for field commissioning without back-and-forth
IP terms: All schematics, firmware, and design files produced are work-for-hire and become our exclusive property upon final payment.
We value experience with: Embedded C/Arduino or similar, Modbus RTU/RS485, LoRa (865–868 MHz), GSM/4G IoT modules, industrial relay/enclosure design, and PCB design for field-deployed hardware.
Process: We'd like to start with a small paid test task before committing to the full design and PCB.