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by PhatFil
Mon Mar 30, 2020 2:29 pm
Forum: General discussion
Topic: I am looking for a wireless system/application.
Replies: 4
Views: 95

Re: I am looking for a wireless system/application.

check out posts and forums devoted to home automation.. for example I use buttons like these that run off cr2032 batteries https://ae01.alicdn.com/kf/H759cfd1bddad4dafa63974542485f988l.jpg they broadcast a code via 433mhz rf using a basic protocol. You can attach a 433mhz receiver to a pi and decode...
by PhatFil
Sun Mar 29, 2020 9:21 pm
Forum: Troubleshooting
Topic: Raspberry 4B doesn't boot from 32GB sd
Replies: 12
Views: 265

Re: Raspberry 4B doesn't boot from 32GB sd

Odd indeed.. you could try to clean the card contacts with isopropanol or similar, and if still no luck you can try adding a layer of sellotape to the card top to add a fraction of thickness and aid pushing the contacts onto its connectors..
by PhatFil
Sun Mar 29, 2020 4:11 am
Forum: Beginners
Topic: start raspbian
Replies: 4
Views: 187

Re: start raspbian

then enter

Code: Select all

sudo raspi-config
to configure your pi to run as you desire

https://www.raspberrypi.org/documentati ... -config.md
by PhatFil
Sat Mar 28, 2020 5:15 am
Forum: Off topic discussion
Topic: Call for help: looking to start a company - solar powered computer
Replies: 31
Views: 977

Re: Call for help: looking to start a company - solar powered computer

btw who pays a monthly phone sub??? A land line (aka POTS line) works in many kinds of disasters when the cell towers all fail because they have no external power and the batteries go flat after about 8 hours. So...I pay a monthly phone "sub". (I live in earthquake country...what kinds of disasters...
by PhatFil
Sat Mar 28, 2020 5:03 am
Forum: Beginners
Topic: Help installing NOOBS
Replies: 18
Views: 376

Re: Help installing NOOBS

no worries . "headless" simply means without tv/monitor or keyboard etc attached. SSH (Secure SHell) is simply a robust and secure way to connect to your headless computer. https://www.raspberrypi.org/documentation/remote-access/ssh/README.md#3-enable-ssh-on-a-headless-raspberry-pi-add-file-to-sd-ca...
by PhatFil
Sat Mar 28, 2020 4:39 am
Forum: Off topic discussion
Topic: Call for help: looking to start a company - solar powered computer
Replies: 31
Views: 977

Re: Call for help: looking to start a company - solar powered computer

Not a crazy idea just a VERY AMBITIOUS one. At least a decade of development probably more.. With an amateur radio (CB) you buy the radio once and that's it. In some areas you need to pay a license fee but it's nowhere as expensive as a cell phone subscription. The idea is to make an amateur radio t...
by PhatFil
Sat Mar 28, 2020 2:22 am
Forum: Off topic discussion
Topic: Call for help: looking to start a company - solar powered computer
Replies: 31
Views: 977

Re: Call for help: looking to start a company - solar powered computer

you may have more success providing devices to the folk who could use them by recycling last seasons contract mobile phones from the primary markets into the hands your target clients ? not as sexy but possibly more productive? why make something new when you have unwanted devices elsewhere. im pret...
by PhatFil
Sat Mar 28, 2020 2:07 am
Forum: Graphics, sound and multimedia
Topic: MultiScreen Wireless
Replies: 1
Views: 81

Re: MultiScreen Wireless

sync all the pies with the same NTP server or host one. and perhaps this tool to expand the granularity of cron to milliseconds could do the syncing for you via scripted scheduling.
https://github.com/ryuever/cronr
by PhatFil
Sat Mar 28, 2020 1:50 am
Forum: Beginners
Topic: Help installing NOOBS
Replies: 18
Views: 376

Re: Help installing NOOBS

no hdmi cable isnt a total show stopper. as long as you have a network cable and network to connect to ;) Many pies (that never gets old for me..) are both installed and run headless (without TV/monitor keyboard and mouse..). you can look up detailed instructions but its simply a case of adding an e...
by PhatFil
Fri Mar 27, 2020 4:44 pm
Forum: General discussion
Topic: Raspberry Pi randomly shuts down when I plug arduino uno in with circuit
Replies: 4
Views: 131

Re: Raspberry Pi randomly shuts down when I plug arduino uno in with circuit

If your using a pi-0?? plugging in a usb device causing a reboot is a known 'feature' that can be overcome with a usb hub in some cases, if not a Pi-0 then a powered usb hub could also solve an issue with your arduino set up drawing too much power.. cutting the +5v wire betwen pi and hub would stop ...
by PhatFil
Fri Mar 27, 2020 4:22 pm
Forum: Networking and servers
Topic: How to configure Raspberry Pi with 2 ip's for Fog_Project
Replies: 2
Views: 102

Re: How to configure Raspberry Pi with 2 ip's for Fog_Project

Hi Probably the simplest solution would be to log into your dhcp server (router?) and assign a static ip to your pi via its mac addy. And then reset your pi to simply acquire an ip addy from the dhcp server on whatever network you plug it into. when @ home your router will apply the fixed ip addy yo...
by PhatFil
Fri Mar 27, 2020 2:56 pm
Forum: Beginners
Topic: Help installing NOOBS
Replies: 18
Views: 376

Re: Help installing NOOBS

I would suggest you forget noobs unless you want to install one of the less popular o/s alternatives. But if you intend to install and use Raspbian Just install that. less data to download, less useless data on your sd card once the installation has been finalised, and a lot quicker from start to fi...
by PhatFil
Fri Mar 27, 2020 1:40 pm
Forum: Troubleshooting
Topic: Raspberry 4B doesn't boot from 32GB sd
Replies: 12
Views: 265

Re: Raspberry 4B doesn't boot from 32GB sd

where did the 32gb cards come from?? the success of the 16gb card does raise valid suspicion.

https://www.google.com/search?q=check+f ... PmJCIuAo28
by PhatFil
Wed Mar 25, 2020 10:04 pm
Forum: Beginners
Topic: Raspberry Pi to Remotely control power switch of PC? Advice + Help needed
Replies: 16
Views: 378

Re: Raspberry Pi to Remotely control power switch of PC? Advice + Help needed

fwiw my solution was to flash the fantastic tasmota firmware https://github.com/arendst/Tasmota/wiki onto a $4 sonoff basic and host mosquitto mqtt broker on a pi. I then use node red,To issue the relevant on/off commands via mqtt to the switch as needed.. But you dont have to, python scripts or mat...
by PhatFil
Wed Mar 25, 2020 9:46 pm
Forum: General discussion
Topic: Temp sensor for Water Tank
Replies: 14
Views: 361

Re: Temp sensor for Water Tank

theoretically the DS18B20 is waterproof, so it could be dangled inside the tank. The DS18B20 sensors are commonly available sealed in a metal tub to make them properly waterproof. even so i wouldnt place a 'naked' probe in liquid.. when using ds18b20 sensors in my microbrewery alongside pt100 senso...
by PhatFil
Wed Mar 25, 2020 8:34 pm
Forum: General discussion
Topic: Temp sensor for Water Tank
Replies: 14
Views: 361

Re: Temp sensor for Water Tank

can you be specific about the size limitations. a small option would be a basic thermocouple since its just 2 dissimilar metals joined together. also small would be a pt100 or pt1000, or ntc thermisters these are available in some tiny sizes. however all these will require additional circuitry. if s...
by PhatFil
Wed Mar 25, 2020 2:38 pm
Forum: Advanced users
Topic: Destroy pi sd card... On purpose if removed
Replies: 53
Views: 1476

Re: Destroy pi sd card... On purpose if removed

Greg Erskine wrote:
Sat Mar 21, 2020 8:55 pm
First rule of security: Do not discuss your security strategy on a public forum. :lol:
second rule implement the simplest solution. potting the device in an epoxy is the general approach
by PhatFil
Mon Mar 23, 2020 1:18 pm
Forum: General discussion
Topic: Water tank level monitoring. Skill level required?
Replies: 8
Views: 290

Re: Water tank level monitoring. Skill level required?

The off the shelf solution you looked at uses the sort of approach that imho you should perhaps consider too https://pimylifeup.com/raspberry-pi-distance-sensor/ should illustrate the point. I also think an 'is empty' alarm could be usefull and for that i like these sensors as theyhave NO MOVING PAR...
by PhatFil
Sun Mar 22, 2020 6:33 pm
Forum: Beginners
Topic: Headless with Wifi Unable to ssh/ping
Replies: 1
Views: 83

Re: Headless with Wifi Unable to ssh/ping

Assuming you have <inserted Your Country code and wifi creds..> before you pull your hair out give the router a reboot ;) even after investing in a netgear RX7000 ac router i still have occasional dhcp issues when adding new devices to my network that resolve with a router restart but otherwise conf...
by PhatFil
Sat Mar 21, 2020 1:32 am
Forum: General discussion
Topic: Network Audio System
Replies: 8
Views: 339

Re: Network Audio System

Im probably missing something here but it sounds like you just want to stream 4 x audio channels concurrently. a google for "lightweight audio streaming pi" pointed here https://www.raspberrypi.org/forums/viewtopic.php?t=202051 if 'lightweight' isnt an issue the heavyweights like vlc should also wor...
by PhatFil
Sat Mar 21, 2020 1:23 am
Forum: Python
Topic: Virtual I/O
Replies: 1
Views: 88

Re: Virtual I/O

Mqtt might be a useful tool for you to check out. it provides a mechanism for processes to publish data through a broker system which can be subscribed to by other systems and processes. http://www.steves-internet-guide.com/into-mqtt-python-client/ you can host a mqtt broker like mosquitto on your p...
by PhatFil
Sat Mar 21, 2020 1:05 am
Forum: Beginners
Topic: How to connect Raspberry 4 B with wifi router without monitor?
Replies: 2
Views: 111

Re: How to connect Raspberry 4 B with wifi router without monitor?

THis is probably what your looking for https://www.raspberrypi.org/documentati ... eadless.md

IF you can connect your pi to the network with a lan cable you can connect and set up the wifi without dropping the wpa_supplicant.conf file in your boot partition..
by PhatFil
Sat Mar 21, 2020 12:57 am
Forum: Camera board
Topic: Does the length of the cable to connect the Pi Camera V2 to the Pi matters?
Replies: 5
Views: 231

Re: Does the length of the cable to connect the Pi Camera V2 to the Pi matters?

Folding aluminium foil around the ribbon cable could provide shielding if you encounter issues due to environmental noise.
by PhatFil
Fri Mar 20, 2020 9:19 pm
Forum: General discussion
Topic: Starting out questions
Replies: 28
Views: 593

Re: Starting out questions

Have you considered running your pi headless? you can connect to the shell via ssh or the desktop via VNC. so no need for a dedicated screen and keyboard.. Can get you started with your pi quicker ;) You only need drop an empty file named "ssh" into the boot partition of your pi sd card to enable ss...

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