What I’m Building: IoT Pipelines, Webhook Retries, and Real-World Debugging

Sandun Siwantha — Mon, 30 Mar 2026 04:30:11 +0000

Lately I’ve been working on a few things:

IoT telemetry pipelines
Webhook retry systems (handling failed deliveries)
Debugging real-world data flow issues from devices

Stack:

Linux + Docker
MQTT
Custom backend services

Biggest lesson so far:
Most systems fail not because of logic, but because of network and reliability issues.

Currently exploring:

AI-assisted coding workflows
Running local models for dev productivity

If you’re working on similar systems, let’s connect.

Building a Reliable IoT Telemetry Pipeline (Lessons from Real Systems)

Sandun Siwantha — Mon, 30 Mar 2026 04:29:13 +0000

🚀 Context

Most IoT tutorials stop at “send sensor data to the cloud.”
In reality, things break — networks drop, endpoints fail, and data gets lost.

I’ve been working on real-world IoT pipelines, and here’s a practical breakdown of what actually matters.

🧱 Core Architecture

Typical flow:

Device → Gateway → Message Broker → Processing → Storage/API

Key components I used:

MQTT for device communication
Dockerized services for isolation
Linux-based gateways

⚠️ Real Problems You Will Hit

Intermittent connectivity (especially in edge environments)
Data loss during API failures
Duplicate events
Backpressure when ingestion spikes

🛠️ What Actually Works

1. Retry Mechanism (Critical)

Implement webhook/API retry with:

exponential backoff
retry queues
dead-letter handling

2. Local Buffering

Gateways should:

store data locally (disk/queue)
flush when connection restores

3. Idempotency

Design APIs to safely handle duplicates:

use unique event IDs
avoid side-effect duplication

4. Observability

Add:

structured logs
basic metrics (success/fail rates)
alerting hooks

🧪 Example: Simple Retry Logic (Pseudo)

if request_failed:
  retry_count++
  wait = base_delay * 2^retry_count
  requeue(event, wait)

🧠 Key Takeaway

IoT is not about sending data.
It’s about guaranteeing delivery under failure.

If you’re building something similar, I’m happy to exchange ideas 👍

DEV Community: Sandun Siwantha