Raspberry Pi Forums

acawley

Apologies! I did indeed miss that link it seems, thank you for bringing it to my attention, I will certainly be giving it a read and a go myself when I have time.

Anyone out there given it a go? What were your experiences?

acawley

I'm confused by the negative responses on this, as though it is impossible to encrypt a device. Would it not be possible to implement some form of full disk encryption on the SD card in a way that it prompts the user for a decryption key on-boot. So the user holds the secret key (a good password in ...

acawley

I wanted to pitch in with my fix which I haven't heard anyone else mention yet: So I had a home-built alarm system that used a PIR sensor (cheap HC-SR501), worked reliably for a couple of months with no false positives, then I had problems. I spent days troubleshooting and was pulling my hair out in...

acawley

I wanted to pitch in with my fix which I haven't heard anyone else mention yet: So I had a home-built alarm system that used a PIR sensor (cheap HC-SR501), worked reliably for a couple of months with no false positives, then I had problems. I spent days troubleshooting and was pulling my hair out in...

acawley

I've just purchased this cheap DC relay here: https://www.ebay.co.uk/itm/182307855649
Although I'm still quite new to working with relays I'm quite confident I should be able to make this one work in the setup I want.

I will keep you posted!

acawley

In the UK this is a maximum of 20 minutes, although many modern alarm bells have a built in limit of 15 minutes. I wasn't aware of that so thank you for letting me know. By chance I had already coded in a 5 minute timer into the software. In conjunction with the siren going off this Pi will actuall...

acawley

Perhaps the Sonoff wont be just the tool for this project - being that I've just noticed it wants a minimum of 90v AC and the siren I will be working with will be 12v DC. I'll cook-up some other plan for the DC relay to be controlled by the Pi I'm sure.

acawley

Well thanks to pcmanbob's suggestion I checked our eBay and I couldn't believe the range of different 12v sirens you could get, simply supply power and woof! Off they go. So I think I might try going that route. I've just order this one: https://www.ebay.co.uk/itm/DC-12V-Loud-Wired-Mini-Indoor-Acces...

acawley

These are handy for inexpensively controlling powered devices via the PIi's GPIOs... https://cdn.shopify.com/s/files/1/2185/4851/products/iot2_1024x1024@2x.jpg?v=1500075827 Interesting! I've not seen one of those before. But you have just made me remember that I actually have a Sonoff Basic WiFi Sm...

acawley

You might do better to search you favourite on line sales sites for a simple siren, much cheaper but still likely to 12v DC powered. I don't mind supplying the alarm / speaker with its own power-supply, I could give it 12v or 5v easily with a seperate source. Thank you for the idea though I will ch...

acawley

I'm trying to learn how to sound an alarm (fire-alarm ideally) as part of a home-brew security alarm system for my shed. I am not trying to build a fire alarm , but instead a motion sensing security system. No camera , just motion sensing and then sounding an alarm. I feel like I'm most of the way t...

acawley

-J or ProxyJump option Interesting, I didn't know about this option, I will have to do some research on that, thank you. Going by my knowledge so far I thought that my SSH Jumpbox (RPi0) would have had to have held all the keys in order to connect to the remote servers. I have used a SSH gateway/ju...

acawley

Thanks for your input, I will checkout LUKS further. I'm not familiar with AppArmor, but I'm not intending to install or use other common applications on the RPi, it would just be used as a SSH gateway. Apologies if I have misunderstood you. My idea is that I would carry a Pi Zero with me that I cou...

acawley

This is more a question about Encryption on Raspbian than anything.... What would be the best encryption to use on Rasbian to encrypt a home folder ? Hopefully something which is relatively easy to use and setup. With Raspberry Pi Zero's being such a great small portable computer I came up with an i...

acawley

I just wanted to thank you for telling me about motionEyeOS - https://github.com/ccrisan/motioneyeos/wiki It was perfect for remotely monitoring our new puppy overnight. What a superb way to run a remote camera and stream the footage live! I combined it with a Pi NoIR Camera which see's infrared (IR...

acawley

Thank you Steven, I'm going to give this a try now!

acawley

I'm after some advice, we're getting our first puppy in one week and I want to build a puppy-monitoring station (like a baby monitor) that we may only use for a few weeks. I already have numerous different Pi's spare and a NoIR Camera module. I have a new 24" HDMI monitor with built in speakers...

acawley

Just achieved it! ...

: testbild-worked.png (2.43 KiB) Viewed 1691 times

Code: Select all

pi@SolarPi:~ $ ssocr -D crop 585 155 225 115 -t 58 -d -1 1080.jpg
12.6

acawley

You can use Image Magick to rotate an image. mogrify or convert will take a rotation angle in degrees. http://www.minihowtos.net/imagemagick-rotate-image http://www.imagemagick.org/Usage/distorts/#rotate_methods Great suggestion - thank you! I already had Image Magick installed as I was using it to...

acawley

I have ssocr installed and working with its test example on the shell of the Pi which is great! But could you help me out with the correct example usage? I'm trying to reference the manual but not sure if I should be using something like: ssocr -T rotate 354 voltage.jpg I have a suspicion that -T ma...

acawley

Thanks for the input gordon and scruss! I could straighten the rig but not immediately (it is somewhat remote). I can also modify the casing to reduce reflections, so duly noted. I purposely lowered the size of the image for automatic upload to my page to minimise on bandwidth and speed things up, b...

acawley

Thanks for the suggestion Dougie, but I'm looking to achieve this in an automated fashion on the shell of the Pi if possible, I'm comfortable creating a bash script for that providing I know the right tool to use - but this is where I am struggling. I made this script: https://github.com/ashleycawle...

acawley

Is it possible to rotate a photo on the shell of a Raspberry Pi but only slight measures or degrees? For example if I had this image which is taken by a remote camera: voltage.jpg And I wanted the 12.8v value to be perfectly horizontal through rotating the image only slightly, I don't mind about cro...

acawley

I should add - I do have access to a server on the public web of which I am willing to open-up a custom port on, presumably this kind of system will be required to act as the central server that all the Pi's chime in to and that I could login to in order to issue commands.

acawley

I'm familiar with controlling numerous Pi's via the terminal, using key-based SSH auth etc. however I have a question about a command and control idea. Here's the scenario: Lets say I have 5 different raspberry pi's online 24/7 spread across 3 different LAN's in 3 different locations. For whatever r...

Search found 51 matches

Re: Securing SD card Image by encrypting in raspberry pi 3

Re: Securing SD card Image by encrypting in raspberry pi 3

Re: PIR false positives

Re: weird problem: PIR sensor positive on wifi activity

Re: Triggering an Alarm with a Raspberry Pi

Re: Triggering an Alarm with a Raspberry Pi

Re: Triggering an Alarm with a Raspberry Pi

Re: Triggering an Alarm with a Raspberry Pi

Re: Triggering an Alarm with a Raspberry Pi

Re: Triggering an Alarm with a Raspberry Pi

Triggering an Alarm with a Raspberry Pi

Re: Encryption for SSH Jump Box

Re: Encryption for SSH Jump Box

Encryption for SSH Jump Box

Re: Remote Puppy Video & Audio Monitor

Re: Remote Puppy Video & Audio Monitor

Remote Puppy Video & Audio Monitor

Re: Rotating a photo only slightly

Re: Rotating a photo only slightly

Re: Rotating a photo only slightly

Re: Rotating a photo only slightly

Re: Rotating a photo only slightly

Rotating a photo only slightly

Re: Raspberry Pi Command & Control

Raspberry Pi Command & Control