Specialized Testing

IoT & Connected Devices

Validating protocol correctness and cloud integration for connected products.

MQTT — MESSAGE FLOW VALIDATION
📱
Sensor A
PUBsensor/temp
BROKER
SUBsensor/temp
Cloud
QoS Level 2 — exactly once delivery
Payload schema validated (JSON)
Reconnect after 30s drop — 0 msg loss
OTA update integrity in progress
Overview

What this engagement covers.

IoT testing requires coverage beyond the web: protocol correctness, device-cloud message flows, OTA update integrity, and behaviour under intermittent connectivity. We test the full stack — from firmware behaviour to cloud processing.

Protocol validation

MQTT, CoAP, and BLE message flows validated for correctness and edge cases.

Device-cloud integration

Message delivery, acknowledgement, and retry behaviour verified end-to-end.

OTA update testing

Update delivery, rollback, and integrity verification across device generations.

Connectivity resilience

Behaviour under packet loss, reconnect scenarios, and offline operation.

Security testing

Device authentication, firmware integrity, and unencrypted channel detection.

Multi-device coordination

Group commands, fan-out messaging, and device state synchronisation.

Primary tooling
MQTT Explorer · Wireshark · custom protocol harnesses · AWS IoT · Azure IoT Hub
Deliverables
Protocol test results, OTA validation report, connectivity resilience findings, security summary
Start Here

Ready to get started?

A 30-minute working session to understand your stack, release cadence, and risk profile. A written scope follows within three business days.