×
Request a Free Consultation
Interested in collaborating with Silicon Signals on your next big idea? Please contact us and let us know how we can help you.
Interested in collaborating with Silicon Signals on your next big idea? Please contact us and let us know how we can help you.
Our client wanted to develop and deploy a scalable, real-time environmental monitoring system across a major metropolitan city. The mission: deliver actionable insights into air quality (PM2.5, NO₂, O₃) and urban noise levels through low-power, resilient IoT sensor networks. Our innovative solution featured Bluetooth Mesh for local data relay, with adaptive LoRaWAN and LTE-M backhaul to guarantee robust, uninterrupted cloud communication. The system had to endure harsh outdoor environments, maintain long battery life, and deliver high accuracy—while supporting over 10,000 sensor nodes citywide. Below are some client requirements:
Deploy a scalable network to capture accurate, real-time air quality and noise data across the entire metropolitan area.
Ensure battery-powered nodes operate for over one year without maintenance, even with continuous sensing and mesh participation.
Maintain uninterrupted data delivery using Bluetooth Mesh locally and LoRaWAN/LTE-M for resilient long-distance backhaul.
The client required a solution capable of monitoring thousands of sensors citywide in real time, with ultra-low power consumption, adaptive hybrid connectivity, strong security, resilience to harsh urban environments, high accuracy, and long-term scalability.
Designing a seamless switching mechanism between LoRaWAN and LTE-M based on coverage, priority, and power constraints.
Maintaining Bluetooth Mesh presence and periodic sensing while achieving >12-month operation on a single battery.
Delivering consistent, trustworthy environmental data across 10,000+ deployed nodes without packet loss or delays.
Securing data across BT Mesh, LoRaWAN, LTE-M, gateways, and the cloud under diverse threat environments.
For the client, adaptive Bluetooth Mesh and hybrid LoRaWAN/LTE-M gateways from Silicon Signals provide scalable, secure, and low-power monitoring.
Dual-mode gateways (LTE-M/LoRaWAN) use intelligent failover, prioritizing LoRaWAN and switching to LTE-M for weak signals, with PSM/eDRX for energy efficiency.
nRF52840 nodes with Zephyr RTOS use deep sleep, RTC wake-ups, and per-sensor power gating, sending aggregated sensor data via Bluetooth Mesh every five minutes.
Gateways aggregate mesh data and securely transmit to AWS IoT Core via MQTT/TLS 1.2 with TPM 2.0 certificates, using QoS 1 and structured topics for reliability.
Custom GPIO/MOSFET power domains shut off sensors between cycles, while Zephyr scheduler, tickless idle, and RTC wake-ups improve memory efficiency and real-time performance.
Silicon Signals provides the client with scalable, reliable, and secure smart city solutions built on deep expertise in embedded systems and IoT.
Discuss Your Smart City Project With Our Experts
Outcomes That Drive Impact
nRF52840 MCU + environmental and noise sensors, HL7800 (LTE-M) + RAK7249 (LoRaWAN), Li-ion cells with low-power management circuitry
Bluetooth Mesh for local aggregation, LoRaWAN + LTE-M hybrid backhaul with adaptive failover, MQTT over TLS 1.2 with QoS 1
Zephyr RTOS with deep sleep, tickless idle, and RTC wake-ups, GPIO/MOSFET-controlled custom power domains
AWS IoT Core for data collection and storage, TPM 2.0 for certificate-based secure cloud authentication, Data visualization dashboards and third-party integration
Proprietary binary encoding for low-power transmission, gateway aggregation with adaptive connectivity, real-time monitoring with <5s alarm latency.
The client benefits from a deployment of 10,000+ nodes, offering 14+ months of battery life, 99.9% data delivery, and real-time public health notifications.
Successfully deployed 10,000+ smart environmental nodes, delivering granular, real-time air and noise data across the entire urban region.
Optimized firmware and mesh communication extended single-cell Li-ion operation to 14+ months, minimizing field maintenance costs.
Adaptive LoRaWAN + LTE-M failover ensures near-perfect data continuity, even under challenging RF and coverage conditions.
Enabled <5-second critical alerts for pollution spikes and noise surges, supporting public health, traffic control, and city planning.
Delivering reliable Smart-City intelligence requires resilient connectivity, long-life devices, and real-time environmental insights. This case study shows what’s possible when engineering excellence meets large-scale urban innovation.
+91 94087 30545
sales@siliconsignals.io
A-802/803, Empire Business Hub, Science City Rd, Ahmedabad - 380060, Gujarat, India
Share Details