Sajjad Ahmad

Experience

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  Jolta Technologies

  Feb 2017 - now

  Embedded System Engineer

  Jolta Technologies is a software development company that specializes in developing android app/games, iOS app/games and providing IOT(internet of things) solutions.I am responsible for developing embedded real-time programs using Arduino IDE which collect data from the sensors, processes it and transmits it via WiFi, MQTT(Message Queuing Telemetry Transport) or serially to a connected Mobile. My duties include writing code (in Arduino IDE), testing, debugging, circuit developing and documentation. At Jolta Technologies my first project was to access ESP globally. I successfully done this project within 20 days using MQTT protocol. Initially I used a third party web socket for communication, and later on we developed our own Mosquitto server(An open source MQTT V3.1/3.1.1 broker). It was one of the best IOT based project for Jolta Technologies and until now I utilized this feature of ESP in several projects like Globally accessible WIFI Socket, online industrial temperature monitoring, online/offline accessing E-bike’s parameters, color controlling of Bubfi (multi-color bulb), online controlling JoltaIO board (an MCU board), Home Automation etc. In online communication using MQTT protocol, all present time challenges were kept in mind. So for preventing any type of miscellaneous attack we adopted AES standard Encryption/Decryption and HMAC-256 in our communications. Here I have worked on interfacing of different type of sensors like Hall Effect(49E and 3144), Reed Switch, Humidity, Rotary Encoder, Temperature sensors(DHT , DS18B20 and LM35), MPU-6050 (Accelerometer plus Gyroscope ), MPU-9250 (Accelerometer, Gyroscope and Magnetometer), Throttle, HMC5883L (magnetometer), flow meter, RF transceiver( NRF24L01 ), Bluetooth module ( HC05 and HC06 ), Ultrasonic Sensor etc. And I have full control of micro controllers like NodeMCU /NodeMCU V3/JoltaIO board (ESP8266 based MCUs), Arduino (Mega, UNO, Nano, Pro mini). And beginner level control over ESP32. Show less