Devon Crawford

Building Firmware for Production | WiFi Control, Updates & Security

Completing the low-level code to make our hardware device fully operational. This is a continuation of our 2020 product development project, with footage that hasn’t been seen before. We had previously implemented most of the core algorithms, such as audio processing and LED output, but the device lacked live controls. Everything was hard-coded into the firmware for testing. The next step is enabling full remote control over WiFi so the device can be used in real scenarios. I decided to run an HTTP server on the microcontroller using standard GET/POST endpoints and JSON data just like the backend web APIs that I'm familiar with. I’ve written firmware before for smaller projects like the Arduino air conditioner, but it's a totally different thing when doing it for a real product. Instead of using Arduino, we use ESP32 for its low cost and dual-core processor with WiFi and Bluetooth. The manufacturer provides many libraries for programming the microcontroller, and they have a nice guide called ESP-Jumpstart which covers WiFi, storage, updates, security, and more. This is my first time writing production-level firmware since the usual demo projects don’t require it, and as you can see its a lot of initial work to set up. Next Video: Previous Video: https://youtu.be/FdrmjjgHYzM Social ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Website: https://devoncrawford.io Twitter: https://twitter.com/DevonCrawford13 Instagram: https://www.instagram.com/devoncrawford_/ Github: https://github.com/devoncrawford Discord: https://discord.gg/sU2fur9 Gear ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ - Video Editing Software (Premiere): https://prf.hn/l/BOomWo3 - All Adobe Apps (I use this plan): https://prf.hn/l/Xv5qk5Q - Webcam (Logitech C920): https://amzn.to/2Cw588c - Desk Microphone (Blue Yeti): https://amzn.to/2FPFmzi - Keyboard (Velocifire TKL01): https://amzn.to/2AQTjJQ Music ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Late June - I'll Remember You Link: https://latejune.bandcamp.com/track/ill-remember-you Sappy - On & On Link: https://sappy94.bandcamp.com/track/on-on Flowwy - Regular Link: https://soundcloud.com/flowarts/regular Sappy - Slide Link: https://sappy94.bandcamp.com/track/slide Late June - City of Lights Link: https://soundcloud.com/latejune/city-of-lights Sappy - Ghost Recon Link: https://soundcloud.com/sappy94/ghost-recon EVIL - PURE EVIL EP @ 20:03 - PIMP Link: https://soundcloud.com/evilokai666/pure-evil-ep-1