---
title: "Discussion on \"Shipping 6,300+ 35A Smart Breakers: PCB, Firmware and Cloud Lessons\" | Hashnode"
description: "Discussion on \"Shipping 6,300+ 35A Smart Breakers: PCB, Firmware and Cloud Lessons\". What designing, calibrating and shipping 6,300+ mains-connected devices taught me about the parts that never show up in a feature list."
url: "https://hashnode.com/posts/shipping-6-300-35a-smart-breakers-pcb-firmware-and-cloud-lessons/6aef0975240540ca4cc183c4"
---

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# [Shipping 6,300+ 35A Smart Breakers: PCB, Firmware and Cloud Lessons](https://thingboot.hashnode.dev/shipping-6-300-35a-smart-breakers-pcb-firmware-and-cloud-lessons?utm_source=hashnode&utm_medium=feed)

What designing, calibrating and shipping 6,300+ mains-connected devices taught me about the parts that never show up in a feature list.

4d ago · 6 min read · thingboot.hashnode.dev  
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## Written by

[Kevin Lee](https://hashnode.com/@thingboot)

@thingboot · Chengdu, China

  
[View profile](https://hashnode.com/@thingboot)

Hardware, firmware and cloud for connected products — from PCB to production.

Connected hardware engineer. PCB, embedded firmware and cloud APIs — from first board spin to production. Writing about the parts that never show up in a feature list.

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