That did the trick, obviously charts on mobile is just too much power!
Strange as it doesn't show any for me on Firefox for Android. Perhaps you have a newer version than all of us!
Broadly speaking, you probably want some kind of relay either mechanically switched or electronically (e.g. with MOSFETs). Most people would prefer an electronic one as they won't make a "clack" noise when turning on or off. Electronic may or may not be more expensive, it depends on the rating.
The key factor will be getting one that is rated to the voltage and current draw of the motor. If the motor is AC powered (e.g. 240V) and is rated at 1200W, then you will need a relay rated to 10A. Same thing goes for DC, just smaller numbers.
You should be able to find some kind of wireless relay on Amazon as well. There are plenty of WiFi ones I'm sure if you want to use an app. There's probably also an assortment of radio ones if you want to use a fob key. The easiest would be to look for something that is a kind o "inline adaptor" so that you plug it between the power and the motor, and it powers itself.
Their STM32 range is massive and used in many many devices. I would assume that whole most hobby-grade electronics talk Arduino, most commercial applications or requiring some compute power will use an STM chip.
"Aircons don't work without power, or for people with no access to power"
The messaging bubble issue may seem silly, but could I not open the gates to more unified messaging in general? Like WhatsApp to Signal to iMessage? I would hope there is a greater scope than just the bubble.
The reality is that a bootloader will seemingly always be needed to account for difficult BIOS' and legacy setups (I'm looking at you, dual-booted Ubuntu 20.04).
Start using and efistub and never worry about boot loaders again!