Portfolio

WiFi Enabled Automatic Water Level Controller (WLC)

### Project Overview **WiFi Enabled Automatic Water Level Controller (WLC)** is an end-to-end IoT product designed and developed by **OTS WORLD**, covering the complete journey from product concept and R&D to hardware, firmware, mobile application, IoT server, testing and final product development. The complete solution was developed within OTS, including **electronics design, schematic development, component selection, custom PCB design, PCB assembly, embedded firmware, ESP8266 WiFi programming, Android application development, IoT server/platform development, device communication, system integration, testing, troubleshooting and product finishing.** This project demonstrates OTS WORLD's capability to develop a **complete connected IoT product ecosystem**, rather than only an electronic device. --- ### Complete Work Performed by OTS WORLD #### 1. Product Research & R&D - Product concept and requirement analysis - Real-world application and user requirement study - Complete system architecture planning - Hardware, firmware, mobile app and server architecture planning - Technology and component evaluation - Product safety and reliability planning - Continuous R&D and product optimization #### 2. Circuit & Schematic Design - Complete electronic circuit design - Detailed schematic development - Sensor interface design - Water-level sensing circuitry - Motor control circuitry - Motor protection and safety circuitry - Power supply and protection sections - Microcontroller interface design - ESP8266 communication interface - Hardware debugging and circuit optimization #### 3. Component Selection - Electronic component selection based on application requirements - Component rating and compatibility analysis - Reliability and availability analysis - Cost-effective component selection for production - Selection of microcontrollers, sensors, communication modules and protection components - Component optimization during R&D #### 4. Custom PCB Design - Complete custom PCB development - PCB schematic-to-layout implementation - Component placement and routing - Power and signal routing - Sensor and communication interfaces - PCB design for reliable real-world operation - Manufacturing-ready PCB files - Hardware revision and optimization #### 5. PCB Assembly & Soldering - PCB component assembly - SMD and through-hole soldering - PCB inspection - Hardware debugging - Component-level troubleshooting - Rework and hardware modifications during development #### 6. Embedded Firmware Development The embedded control system was developed by OTS using the **ATmega32 microcontroller**. Work includes: - Water-level sensing and detection logic - Full / Medium / Low level processing - Automatic motor-control logic - Manual motor-control operation - Motor safety and protection logic - Dry-run detection/protection - Sensor filtering and stability logic - Timing and control algorithms - Indicator control - Communication handling - Firmware debugging and optimization #### 7. WiFi & IoT Device Firmware The **ESP8266** is used as the WiFi/IoT communication layer. OTS handled: - ESP8266 firmware development - WiFi configuration and connectivity - Device communication - Local communication handling - Cloud/IoT communication - Device configuration - Communication between hardware and mobile application - Connection recovery and reliability handling - IoT device integration --- ### 8. Android Mobile Application Development The **Android application is also part of OTS WORLD's development scope**. The application provides the user interface for interacting with the WLC device and IoT ecosystem. OTS handled: - Android application architecture - Device pairing and onboarding - WiFi setup and device configuration - Device status monitoring - Automatic / Manual / Timer / Smart control interfaces - Water-level status display - Device connectivity status - Local device communication - Cloud/IoT communication - Device command handling - Device verification and recovery flows - Communication error handling - User-friendly IoT control interface This demonstrates that OTS can develop the **mobile application layer together with the hardware and firmware**, instead of depending on a separate third-party application team. --- ### 9. OTS IoT Server / Cloud Platform OTS WORLD also designed and developed the **IoT server/platform used for connected device communication and management**. The IoT backend is designed to act as a platform between connected devices and applications. OTS handles: - IoT server architecture - Device communication infrastructure - Device registration - Device identification - Device authentication/connection handling - Device data and telemetry handling - Remote command communication - Device status management - Mobile App ↔ IoT Server ↔ Device communication - Cloud-based device management - IoT API development - Server-side device integration ### IoT Platform Capability for Clients The OTS IoT platform can also be used beyond the WLC product. **A client can develop their own IoT hardware/device and integrate that device with the OTS IoT platform**, subject to the platform's integration/API requirements. This means OTS can provide an integrated ecosystem consisting of: **Custom Hardware → Firmware → WiFi/IoT Connectivity → OTS IoT Server → Android App** Clients who already have their own hardware can also potentially use the **OTS IoT infrastructure as their IoT backend**, rather than building an entire IoT server platform from scratch. --- ### 10. System Integration OTS handled integration across all major layers: **Hardware** → Custom PCB + Sensors + Motor Control **Firmware** → ATmega32 + ESP8266 **Mobile Application** → Android App **IoT Backend** → OTS IoT Server **Communication** → Device ↔ Local Network ↔ IoT Server ↔ Android App This complete integration allows OTS to develop and troubleshoot the complete system from the physical device all the way to the cloud and mobile application. --- ### 11. Testing & Validation - Individual electronic module testing - PCB testing and debugging - Sensor testing and calibration - Firmware testing - Motor-control testing - WiFi connectivity testing - Android application testing - Device pairing testing - Local communication testing - IoT server communication testing - Device-to-cloud testing - App-to-device testing - Complete system integration testing - Real-world water tank testing - Long-duration reliability testing - Fault identification and troubleshooting - Hardware/firmware/software integration validation --- ### 12. Product Finishing & Final Assembly - Final hardware integration - Enclosure integration - Front-panel and indicator integration - Sticker/label design and implementation - Product assembly - Hardware finishing - Visual inspection - Functional inspection - Final product testing and validation --- ### 13. R&D, Optimization & Product Evolution Development did not stop at the first working prototype. OTS worked on continuous: - Hardware optimization - Firmware optimization - Sensor accuracy improvement - Safety improvement - Communication reliability - WiFi connectivity improvement - Mobile application improvement - IoT communication optimization - User experience improvement - Product stability and reliability - Production-readiness improvements --- ## Product Features - Automatic & Manual Motor Control - Upper Tank & Under Tank Monitoring - 3-Level Water Indication — Full / Medium / Low - WiFi Connectivity - Android Application - IoT / Cloud Connectivity - Remote Device Monitoring - Remote Control - Device Pairing & Configuration - Dry-Run Protection - Motor Safety Protection - Real-Time Water-Level Monitoring - Custom Electronics & PCB - Embedded Microcontroller Control - OTS IoT Server Integration - Local & Cloud Communication --- ## Technologies & Expertise **Electronics Design** **Circuit & Schematic Design** **PCB Design & Development** **PCB Assembly & Soldering** **Embedded Systems** **ATmega32** **ESP8266** **Embedded C / Firmware Development** **Sensor Interface** **Motor Control** **WiFi / IoT** **Android Application Development** **IoT Server / Cloud Backend** **API Development** **Device Communication** **Hardware Debugging** **System Integration** **Testing & Validation** **Product R&D** **Product Development** **Manufacturing & Product Finishing** --- ## End-to-End Product Development Capability This project demonstrates that **OTS WORLD can handle complete IoT product development under one development ecosystem**. ### From Idea to Final Product **Requirement & Concept** ↓ **R&D** ↓ **Circuit & Schematic Design** ↓ **Component Selection** ↓ **PCB Design** ↓ **PCB Manufacturing & Soldering** ↓ **Embedded Firmware** ↓ **WiFi / IoT Firmware** ↓ **Android Application** ↓ **IoT Server / Cloud Platform** ↓ **Device & Server Integration** ↓ **Testing & Debugging** ↓ **Product Finishing** ↓ **Final Validation & Deployment** ### What This Means for Freelance Clients A client can approach **OTS WORLD for an entire connected product**, instead of hiring separate teams for hardware, PCB, firmware, Android application and IoT backend development. OTS can work on: **Hardware + PCB + Embedded Firmware + WiFi/IoT + Android App + IoT Server + API + System Integration + Testing + Product Development** The WLC project is an example of this complete **end-to-end product development capability**.

Client: OTS WORLD