6 ms·

It’s a like a deja vu, this website. It’s been linked repeatedly, for years, having the same kind of discussion on HN over and over

busymom0 5y ago
I had a similar deja vu because just few days ago I posted a comment asking similar tech: > Other than raspberry pi, does anyone know of an even lower powered board which can run a very simply web server (only needs to return a single html file)? I have an idea for a fun hobby project where I want to connect my echo bike (for cardio) to the board which charges it everyday and returns an html with how much I charged it and daily cardio stats. Basically, if I don’t do cardio, then the board won’t be charged enough to keep the site up, so that gives me incentive to do it regularly. https://news.ycombinator.com/item?id=29409339 https://news.ycombinator.com/item?id=29409339
- lstodd 5y ago
  I ran a webserver of sorts on an STM32F767, a python one of all things. 200mA looks like about par for the course, ethernet and all.
  - foxfluff 5y ago
    What's the supply voltage? Do you have a breakdown of which parts of the board consume how much? I feel like one should be able to use way less than that, but there are plenty of ways to waste power on a board that isn't designed to be battery powered. One project I've been thinking about recently (if I only I could find the time..) is to build a tiny server around a microcontroller coupled to a small NiMH pack (just standard AA/AAA rechargeable cells) and a small solar panel, running by the (not particularly well lit) window of my home office.
    - lstodd 5y ago
      3.3V, that's pretty standard nowadays. I don't have a breakdown, it was cobbled together from whatever was around, an STM32 devboard, some regulators, some half-dead li-fe-pos, almost useless BMS from ali, this sort of stuff. Obviously that ate significantly less than an RPi, but I can't say how much, don't actually remember since that wasn't the problem. Another take was a weather station, basically an ESP on a ~2500mAh 18650 li-ion. That lived for like a week on a charge, stuff being fetched from it every minute over wifi. I would recommend against using NiMH for that, just get some 18650s and work them between 80-40% charge, they'll last forever.
deleted 5y ago
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busymom0 5y ago

I had a similar deja vu because just few days ago I posted a comment asking similar tech: > Other than raspberry pi, does anyone know of an even lower powered board which can run a very simply web server (only needs to return a single html file)? I have an idea for a fun hobby project where I want to connect my echo bike (for cardio) to the board which charges it everyday and returns an html with how much I charged it and daily cardio stats. Basically, if I don’t do cardio, then the board won’t be charged enough to keep the site up, so that gives me incentive to do it regularly. https://news.ycombinator.com/item?id=29409339 https://news.ycombinator.com/item?id=29409339

lstodd 5y ago
I ran a webserver of sorts on an STM32F767, a python one of all things. 200mA looks like about par for the course, ethernet and all.
- foxfluff 5y ago
  What's the supply voltage? Do you have a breakdown of which parts of the board consume how much? I feel like one should be able to use way less than that, but there are plenty of ways to waste power on a board that isn't designed to be battery powered. One project I've been thinking about recently (if I only I could find the time..) is to build a tiny server around a microcontroller coupled to a small NiMH pack (just standard AA/AAA rechargeable cells) and a small solar panel, running by the (not particularly well lit) window of my home office.
  - lstodd 5y ago
    3.3V, that's pretty standard nowadays. I don't have a breakdown, it was cobbled together from whatever was around, an STM32 devboard, some regulators, some half-dead li-fe-pos, almost useless BMS from ali, this sort of stuff. Obviously that ate significantly less than an RPi, but I can't say how much, don't actually remember since that wasn't the problem. Another take was a weather station, basically an ESP on a ~2500mAh 18650 li-ion. That lived for like a week on a charge, stuff being fetched from it every minute over wifi. I would recommend against using NiMH for that, just get some 18650s and work them between 80-40% charge, they'll last forever.

deleted 5y ago

[deleted]