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Show HN: Raspberry Pi garage door opener

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Re: Show HN: Raspberry Pi garage door opener

#21

Post by sschueller »

metaphor wrote: post #19
zaabis wrote: post #15

Earlier quoted context omitted.

Can you elaborate?

For starters, 240VAC input represented by what appears to be a vanilla barrel jack; PCB relay module that doesn't look like it'd come close to meeting clearance, creepage, etc requirements expected of such applications; wiring represented as discrete point-to-point while completely ignoring the importance of gauge, insulation rating, etc. I just hope an ignorant passerby doesn't try to hack this up with speaker wire…

The motor shown also appears to be a NEMA17 stepper motor...

Re: Show HN: Raspberry Pi garage door opener

#22

Post by woutr_be »

Very cool project, I've been wanting to do something with my Raspberry Pi as well.

I mainly wanted to focus on turning my AC units on and off. I assume I'll need some sort of IR transmitter, and possibly a receiver to understand the signals the remote is sending.

Re: Show HN: Raspberry Pi garage door opener

#23

Post by snickmy »

metaphor wrote: post #19
zaabis wrote: post #15

Earlier quoted context omitted.

Can you elaborate?

For starters, 240VAC input represented by what appears to be a vanilla barrel jack; PCB relay module that doesn't look like it'd come close to meeting clearance, creepage, etc requirements expected of such applications; wiring represented as discrete point-to-point while completely ignoring the importance of gauge, insulation rating, etc. I just hope an ignorant passerby doesn't try to hack this up with speaker wire…

All valid points, the beauty of Github is that you can write a pull request and add all those informations to the project, or even better, you can write what an alternative solution would be 'Instead of using X, you can use Y'. If you feel extreme generous you could even use this as a teaching opportunity. Explain concept like Creepage starting from the existing example and propose the alternative solution from there.

Re: Show HN: Raspberry Pi garage door opener

#24

Post by zaabis »

dirktheman wrote: post #17

It's a cool project, but for these kind of things I'd rather use a Shelly1. Runs locally, can easily be flashed with Tasmota firmware and it connects to my Home Assistant instance. This thing has never failed me and it's only $15, way cheaper than a Pi (keep the RBPi as your Home Assistant server!)

Thanks for sharing! Will try it out ;)

Re: Show HN: Raspberry Pi garage door opener

#25

Post by zaabis »

zeusly wrote: post #18

As someone who has built products with a Raspberry Pi, I'm not sure I would bet on a WIFI connection. I can almost guarantee you that you will sit in your car and scream bloody murder because the WIFI ist not connecting. My products had to work with a lot of other networks around and were built on a Model 3 B, maybe it has improved since then. Sadly I can't point you into the direction of solutions because we just sw…

latest ones seem much more stable. No issues so far. v >= 3b+

Re: Show HN: Raspberry Pi garage door opener

#26

Post by TaylorAlexander »

zeusly wrote: post #18

As someone who has built products with a Raspberry Pi, I'm not sure I would bet on a WIFI connection. I can almost guarantee you that you will sit in your car and scream bloody murder because the WIFI ist not connecting. My products had to work with a lot of other networks around and were built on a Model 3 B, maybe it has improved since then. Sadly I can't point you into the direction of solutions because we just sw…

Some kind of LoRa radio would do well. This 433 mhz one would have long range with a bidirectional link.

https://www.adafruit.com/product/3179

Re: Show HN: Raspberry Pi garage door opener

#27

Post by remarkEon »

melvinroest wrote: post #12

Related to "what raspberry pi projects can I start?" For people that are interested in raspberry pi projects. I compiled a list, mostly for myself, but if it is semi-useful for anyone else, I'd consider that a win. I scoured HN and searched on YouTube, Google and thought of my own ideas to find the rpi projects that fascinated me. https://docs.google.com/document/d/1xT6-vN4sFnRLMOdj9wC4_ESW... I'll put this project o…

Thanks, I have three of these things hanging out in my desk drawer (and two more that run a NAS and Pi Hole). This weekend's project.

Re: Show HN: Raspberry Pi garage door opener

#28

Post by metaphor »

snickmy wrote: post #23
metaphor wrote: post #19

Earlier quoted context omitted.

For starters, 240VAC input represented by what appears to be a vanilla barrel jack; PCB relay module that doesn't look like it'd come close to meeting clearance, creepage, etc requirements expected of such applications; wiring represented as discrete point-to-point while completely ignoring the importance of gauge, insulation rating, etc. I just hope an ignorant passerby doesn't try to hack this up with speaker wire…

All valid points, the beauty of Github is that you can write a pull request and add all those informations to the project, or even better, you can write what an alternative solution would be 'Instead of using X, you can use Y'. If you feel extreme generous you could even use this as a teaching opportunity. Explain concept like Creepage starting from the existing example and propose the alternative solution from there…

A courtesy HN response and 3 self-service pointers is the limit of my generosity...for everything else, find a charity.

Re: Show HN: Raspberry Pi garage door opener

#29

Post by bonzini »

dirktheman wrote: post #17

It's a cool project, but for these kind of things I'd rather use a Shelly1. Runs locally, can easily be flashed with Tasmota firmware and it connects to my Home Assistant instance. This thing has never failed me and it's only $15, way cheaper than a Pi (keep the RBPi as your Home Assistant server!)

Or an ESP8266, using MQTT to "press" buttons on a standard garage door remote control through a relay module. I uploaded mine here: https://imgur.com/a/l2wt40w (green and blue are ground and 5V, gray and white are the pulses to the relays).
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