Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Best Raspberry Pi Projects

tomshardware.com

Post reply on HN
Print view View original

61–69 of 69 posts

Re: Best Raspberry Pi Projects

#61

Post by kjs3 »

ajsnigrutin wrote: post #5
phkahler wrote: post #4

Where can I get a Pi these days. I have a work project (low volume need about 5 Pi) where I replaced a Matrix Orbital LED display and custom membrane keypad with a Pi and touchscreen. I used my own personal Pi model B but I need a few for the company and they are out of stock everywhere. (displays are not a problem, just the Pi itself)

I need a couple for a project, and yeah... good luck. RPI400 is available pretty much everywhere, but rpi3, 4 or zeroW like they never existed.

For anyone thinking "I'll just get a 400 and open it up and pull the Pi", the 400 motherboard isn't remotely the same form factor as the usual RPi's.

Re: Best Raspberry Pi Projects

#62

Post by Auracle »

brimble wrote: post #52
Auracle wrote: post #22

Earlier quoted context omitted.

Maybe things have changed, but when I was looking for doggy doors I was dismayed nobody made one that would automatically open in case of a fire.

I'm no expert, but I can imagine that automatically opening an air vent to the outdoors, when a fire is detected, isn't a great idea.

What we bought has several flaps (to help with insulation) and a plastic cover we can put over it at night. The flaps would still be there; I just wanted a "cover" that would come off in an emergency.

Re: Best Raspberry Pi Projects

#63

Post by tomcam »

tlavoie wrote: post #55
sgt wrote: post #31

Earlier quoted context omitted.

You can always build a tiny little house for your outside ESP and leave it outside.

Yeah, mine's under a deck, in a travel soap dish with holes drilled in it. Works great! Power for that one is one of those little solar panels with a micro-USB port on it, used for battery-powered security cameras.

Love that! Battery backup for night & downcast days?

Re: Best Raspberry Pi Projects

#64

Post by tlavoie »

tomcam wrote: post #63
tlavoie wrote: post #55

Earlier quoted context omitted.

Yeah, mine's under a deck, in a travel soap dish with holes drilled in it. Works great! Power for that one is one of those little solar panels with a micro-USB port on it, used for battery-powered security cameras.

Love that! Battery backup for night & downcast days?

Yes, I have a 2200 mAh 18650 cell in there too, which the panel will mostly keep charged. In the darker, cloudier winter, I swap in a battery and recharge manually if it's not keeping up.

Running on an Adafruit ESP32 Feather board, it wakes up, sends its current readings over Wi-Fi to an MQTT service (that is on a Raspberry Pi), and goes back to sleep for 10 minutes. A little daemon running saves to Sqlite database, and another ESP32 unit inside has its own sensor, as well as displaying both (outside pulled from MQTT).

I've got some pictures and such, though haven't quite gotten to the much-belated blog post yet.

Re: Best Raspberry Pi Projects

#65

Post by iso1631 »

philjohn wrote: post #11

See also RaspAP - turns your raspberry pi into a wireless access point. I have one setup in a Raspberry Pi 400 for when I travel - it's configured as a wireguard peer back to inside my home network so any devices I connect to it are being routed securely to there before out to the internet (and I can also access my network from the road, including backups and media).

I stayed in a hotel over easter, the wifi in the hotel did not allow outgoing ICMP, tcp/22 or udp on any port. The only traffic I could find allowed outbound was on tcp/80 and tcp/443

udptunnel did the job, although I had to tether off my phone to get the server up and running.

Re: Best Raspberry Pi Projects

#66

Post by sgt »

tlavoie wrote: post #64
tomcam wrote: post #63

Earlier quoted context omitted.

Love that! Battery backup for night & downcast days?

Yes, I have a 2200 mAh 18650 cell in there too, which the panel will mostly keep charged. In the darker, cloudier winter, I swap in a battery and recharge manually if it's not keeping up. Running on an Adafruit ESP32 Feather board, it wakes up, sends its current readings over Wi-Fi to an MQTT service (that is on a Raspberry Pi), and goes back to sleep for 10 minutes. A little daemon running saves to Sqlite database,…

Thought about getting a bigger solar panel for those cloudy days?

Re: Best Raspberry Pi Projects

#68

Post by tomcam »

tlavoie wrote: post #64
tomcam wrote: post #63

Earlier quoted context omitted.

Love that! Battery backup for night & downcast days?

Yes, I have a 2200 mAh 18650 cell in there too, which the panel will mostly keep charged. In the darker, cloudier winter, I swap in a battery and recharge manually if it's not keeping up. Running on an Adafruit ESP32 Feather board, it wakes up, sends its current readings over Wi-Fi to an MQTT service (that is on a Raspberry Pi), and goes back to sleep for 10 minutes. A little daemon running saves to Sqlite database,…

> haven't quite gotten to the much-belated blog post yet.

Thanks for the preview. Looking forward to it.

Re: Best Raspberry Pi Projects

#69

Post by tlavoie »

sgt wrote: post #66
tlavoie wrote: post #64

Earlier quoted context omitted.

Yes, I have a 2200 mAh 18650 cell in there too, which the panel will mostly keep charged. In the darker, cloudier winter, I swap in a battery and recharge manually if it's not keeping up. Running on an Adafruit ESP32 Feather board, it wakes up, sends its current readings over Wi-Fi to an MQTT service (that is on a Raspberry Pi), and goes back to sleep for 10 minutes. A little daemon running saves to Sqlite database,…

Thought about getting a bigger solar panel for those cloudy days?

Cloudy season, more like it, BC coast. ;) Really, if I do it every couple weeks or so, it isn't a big deal. I charge the inside one periodically as well, as I don't leave it plugged in. For that one though, I added a last-update time; with the e-paper display, it's not immediately obvious when it has run out of juice.
Post reply on HN