Dumb to smart convection heater using a controller and ESPHome

Supporty my work: https://smallbatchfactory.com/products

Case STLs: https://smallbatchfactory.lemonsqueezy.com/buy/de0a6eca-b3fa-40cf-8c1e-0fc4a31e61f5

AC powered 2x relay board: https://s.click.aliexpress.com/e/_c30indOh
DC powered 2x relay board: https://s.click.aliexpress.com/e/_c3y20ilb

DC powered 2x 30A relay board: https://s.click.aliexpress.com/e/_c4SeqM8D
AC powered 4x 30A relay board: https://s.click.aliexpress.com/e/_c4Si5htB
DC powered 8x 30A relay board: https://s.click.aliexpress.com/e/_c3Ndk8DT

External relay board (no controller) varieties: https://s.click.aliexpress.com/e/_c4VgdYv7

00:00 - Introduction
00:31 - Project preface
02:19 - The heater
04:58 - The controller
07:14 - The annoying fan circuit
07:40 - Coming up with a wiring plan
11:04 - The controller case
13:13 - Attaching the case
13:41 - The issue with my wiring plans
14:39 - Drawbacks of the case design
16:47 - ESPHome preface
17:26 - Wiring up the USB UART adapter
18:15 - Flashing the firmware
19:40 - Temperature test
20:25 - Case lid design
23:15 - Finishing touches for the case
23:52 - One more thing...