Designed sensor nodes with SX127x LoRa modules. Implemented deep-sleep with peripheral clock gating and optimized wake-up intervals for multi-month battery life.
End-to-end telemetry system with LoRa nodes (SX127x), ESP32 gateway, MQTT/Kafka backend, AES-128 encryption, and custom TDMA scheduling for multi-month field operation.
Designed sensor nodes with SX127x LoRa modules. Implemented deep-sleep with peripheral clock gating and optimized wake-up intervals for multi-month battery life.
Built ESP32 gateway bridging LoRa uplink traffic to MQTT/Kafka backend. Simple provisioning allows new nodes to be added by deploying and registering in backend.
Implemented lightweight TDMA-like time-slot scheme on top of LoRa's ALOHA MAC to reduce collisions and improve reliability in the 433MHz ISM band.
Secured the full path with AES-128 payload encryption on nodes and SSL/TLS on gateway-backend link, hardening against eavesdropping and message injection.
Reliable multi-node sensor network with months of battery life and secure data transmission.
Ensure compliance with local ISM band regulations (433MHz).