Clear DefinitionsIoT Node
1 min read
Pronunciation
[eye-oh-tee nohd]
Analogy
Like a weather station that measures temperature and humidity and reports readings to a central database.
Definition
A device equipped with sensors, actuators, and network connectivity that collects and transmits data to blockchain or edge networks for recording, automation, or analytics.
Key Points Intro
IoT nodes bridge physical-world events to on-chain logic via secure data feeds.
Key Points
Sensor suite: GPS, temperature, motion, etc.
Connectivity: Wi-Fi, LTE, LoRaWAN, or satellite links.
Secure identity: Device keys and TPM/HSM for signing.
Edge compute: Preprocessing and local decision-making.
Example
A supply chain IoT node logs container temperature every hour, signs data, and submits hashed batches to a blockchain for provenance tracking.
Technical Deep Dive
Node firmware runs on ARM MCU, collects sensor data, signs with ECDSA key stored in TPM, and publishes to MQTT broker. Edge gateway batches readings, constructs Merkle root, and anchors to blockchain via oracle.
Security Warning
Compromised nodes can feed false data; enforce hardware attestation and firmware OTA signing.
Caveat
Network coverage and power constraints limit data frequency.
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