Just saw the post about Helsinki opening several bridges for a similar purpose, so thought I'd share this here as well.

Porto Metro system didn't exist until around 20 years ago. Just last year, it carried more than 90 million people, and it's not stopping.

While traffic in Porto has actually gotten worse, as tourism and building rehabilitation have exploded, the investment in the metro continues.

This bridge is part of the new "Ruby line", and will provide another much needed way of crossing the Douro river, and will be exclusively used by pedestrians and cyclists, along with the metro.

This line is great because it will connect the other existing lines to a university campus and a large shopping center, while serving a fairly high density area where the residents mostly work in Porto, and have to commute daily.

Hi everyone!

I'm trying to control a "dumb" led light strip segment with an ESP-01S. This is fairly low current, the strip will pull 150mA-200mA max (depends on... artistic? needs).

I have two NPN transistors (2N2222), one to control the 12V supply to the white "channel" and the other the red+blue (don't need the green).

I had to pull-down the gates as I had some flickering, and it works perfectly if I manually connect the GPIOs after the ESP-01S boots.

The ESP will boot if I have the RX pin (GPIO03) pulled down on boot, but not if I pull down any of the others.

I'm not smart enough to come up with a way to have that extra pin I need to be high only during boot, while the gate it's attached to needs to be pulled down...

Any thought, other than getting something with more IO pins?