---
title: "Kevin Lee (@thingboot) | Hashnode"
description: "Hardware, firmware and cloud for connected products — from PCB to production. Read the latest articles by Kevin Lee on Hashnode."
url: "https://hashnode.com/@thingboot"
---

@thingboot

# Kevin Lee

@thingboot · Chengdu, China · Joined November 2026

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

[Website](https://www.thingboot.com/)

### [Which IoT Device SDKs Cover ESP-IDF, Arduino, STM32 and HarmonyOS? A Coverage Matrix](https://thingboot.hashnode.dev/which-iot-device-sdks-cover-esp-idf-arduino-stm32-and-harmonyos-a-coverage-matrix?utm_source=hashnode&utm_medium=feed)

A per-cell coverage matrix for ESP-IDF, Arduino, STM32, HarmonyOS and cloud SDKs - which layer each SDK covers and what needs verification.

3 min read · [thingboot.hashnode.dev](https://thingboot.hashnode.dev/which-iot-device-sdks-cover-esp-idf-arduino-stm32-and-harmonyos-a-coverage-matrix?utm_source=hashnode&utm_medium=feed)

[14h ago](https://hashnode.com/posts/which-iot-device-sdks-cover-esp-idf-arduino-stm32-and-harmonyos-a-coverage-matrix/6af425dfaebd2641c324976f)

### [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.

6 min read · [thingboot.hashnode.dev](https://thingboot.hashnode.dev/shipping-6-300-35a-smart-breakers-pcb-firmware-and-cloud-lessons?utm_source=hashnode&utm_medium=feed)

[4d ago](https://hashnode.com/posts/shipping-6-300-35a-smart-breakers-pcb-firmware-and-cloud-lessons/6aef0975240540ca4cc183c4)