Sadique K.

I build complete IoT and embedded systems — from firmware and hardware communication to cloud connectivity and mobile applications. I work with ESP32 and other microcontrollers to develop reliable connected devices using WiFi, BLE, LTE, MQTT, and IoT cloud platforms. ### What I can build ### • ESP32 / Arduino firmware • IoT devices and sensor systems • BLE and WiFi communication • LTE / GSM connectivity • MQTT-based device communication • AWS IoT integrations • OTA firmware updates • Device-to-cloud data pipelines • Android applications for IoT devices • Django / Python backends and APIs • Raspberry Pi-based systems • Hardware/firmware integration and debugging ### Typical IoT architecture ### Device → ESP32 → WiFi/BLE/LTE → MQTT → Cloud → Android/Web Dashboard I can work on an individual part of the system or take responsibility for the complete device-to-cloud application. ### I am particularly useful when ### • Your ESP32 firmware is unreliable or needs debugging • You need to connect a device through LTE/WiFi/BLE • You need MQTT/AWS IoT communication • You need OTA firmware updates • You need an Android app to communicate with hardware • You need a backend for storing and processing device data • You have an existing prototype that needs to become a reliable product I focus on practical engineering, debugging real hardware/software interactions, and delivering working systems rather than just code. If you already have hardware, firmware, an existing codebase, or a partially working prototype, I can help diagnose the problem and take it to the next stage.