Mohammad Mostajab

Implemented local LoRaWAN processing on a Dragino OpenWrt gateway so sensor payloads can be decrypted and processed without relying on a cloud server, reducing latency and improving resilience during internet outages. Configured Elsys ERS CO2 sensors in ABP mode using AT commands and NFC tools, including secure handling of keys (DevAddr, NwkSKey, AppSKey). Wrote and deployed Lua scripts to decode payloads, convert them to readable ASCII/JSON, and publish results to a local MQTT broker. Customized packet mapping and ingestion rules with documented Web UI/SFTP access for maintainability. Integrated Beckhoff PLCs using TwinCAT 3 and created a load manager service for load control data exchange. Connected Shelly devices for real-time energy readings into monitoring and optimization workflows. Built a temperature-optimization service using BACnet building sensors and controlled fans to move areas toward target temperatures. Supporting applications included Go APIs, Vue.js, C#, PostgreSQL, E

Implemented edge-side LoRaWAN (ABP) decryption on Dragino OpenWrt gateways for offline/low-latency deployments. Built decoders and published JSON telemetry to local MQTT; documented operations.

Develop C#.NET-based integration for BACnet data with an OPC UA Server, enabling BACnet data modification via OPC UA and reflecting updates on BACnet to the OPC UA server. MQTT is used for data persistence. Project deployed on Raspberry Pi.