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IoT Protocol Selection Guide: LoRaWAN, NB-IoT, MQTT, Modbus, Wi-Fi
IoTMarketi Editorial
Industrial IoT guides
At a glance
The right protocol depends on range, power, latency and OT integration. This guide compares the connectivity and messaging options most used in 2026.
Why protocol choice matters
The wrong link budget kills batteries, leaves coverage holes or stalls SCADA integration. In 2026, enterprise IoT is a portfolio, not a single-radio bet.
Quick decision table
| Need | Prefer |
|---|---|
| Long range + low power + private network | LoRaWAN |
| Deep indoor + carrier SIM | NB-IoT / LTE-M |
| Mobile assets, video, high bandwidth | LTE / 5G / industrial router |
| Campus high throughput | Wi-Fi 6 / Ethernet |
| Cloud telemetry | MQTT (most often) |
| PLC / drive / meter | Modbus, often with OPC UA above |
LPWAN: LoRaWAN vs cellular narrowband
- LoRaWAN: You control gateway + network server — strong for campuses, plants, farms and building sensors.
- NB-IoT: Tiny payloads, deep coverage — meters and fixed sensors.
- LTE-M: Better for mobile tracking and lower latency than NB-IoT.
Compare: NB-IoT vs LoRaWAN
Messaging: MQTT
MQTT remains the backbone for intermittent links (QoS, Last Will, low overhead). Edge gateways often translate field buses to MQTT. → What is MQTT?
OT world: Modbus and OPC UA
OPC UA for semantic models, Modbus for legacy devices. Edge nodes normalize both northbound.
Hardware
- Sensors / LoRaWAN gateways: Milesight, Dragino
- Industrial routers & trackers: Teltonika
- Catalog: Products
Checklist
- Payload size and frequency?
- Latency in seconds or milliseconds?
- Battery or mains?
- How does it join OT systems?
- Security zones considered?
Bottom line
Choose protocols before brands, then assemble matching hardware from IoTMarketi.
Frequently Asked Questions
LoRaWAN mı NB-IoT mi?
Kendi ağınızı kurmak, lisanssız band ve uzun pil ömrü istiyorsanız LoRaWAN; operatör kapsaması, derin iç mekân ve SIM tabanlı yönetim istiyorsanız NB-IoT/LTE-M öne çıkar.
MQTT bir bağlantı teknolojisi midir?
Hayır. MQTT, TCP/IP üzerinde çalışan hafif bir yayınla-abone ol mesajlaşma protokolüdür. Altında Wi-Fi, Ethernet veya hücresel olabilir.
Modbus hâlâ gerekli mi?
Evet. Birçok PLC, sayaç ve sürücü Modbus konuşur. Gateway’ler Modbus’u MQTT veya OPC UA’ya çevirerek buluta taşır.
