> you can build your own around the ESP8266. Having just done this with something that required an element of reliability, I can confirm that this is quite eas

> you can build your own around the ESP8266. Having just done this with something that required an element of reliability, I can confirm that this is quite easy. Micropython is great, but I did have some reliability issues – it's quite unfortunate that the hardware watchdog timer isn't implemented yet for the ESP8266. In the end I switched to using the Arduino port and platformIO, and it's quite literally the simplest code that might work.