Raspberry Pi Forums

PhatFil

and it rains a lot?

PhatFil

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...

PhatFil

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...

PhatFil

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...

PhatFil

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...

PhatFil

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

PhatFil

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...

PhatFil

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 ...

PhatFil

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...

PhatFil

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...

PhatFil

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

PhatFil

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...

PhatFil

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...

PhatFil

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...

PhatFil

Greg Erskine wrote: ↑
Sat Mar 21, 2020 8:55 pm
First rule of security: Do not discuss your security strategy on a public forum.

second rule implement the simplest solution. potting the device in an epoxy is the general approach

PhatFil

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...

PhatFil

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...

PhatFil

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...

PhatFil

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...

PhatFil

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..

PhatFil

Folding aluminium foil around the ribbon cable could provide shielding if you encounter issues due to environmental noise.

PhatFil

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...

PhatFil

Lurve the idea, I dont know about manufacturing but you could perhaps make a prototype from a composite like fibreglass for yourself. Find a suitable donor keyboard gut it and use modeling clay to extend it to make the form for a negative fibreglass mold for your ideal shell. Not easy quick or very ...

PhatFil

so something like if lan up enable bluetooth and pair keyboard/mouse wifi off else disable bluetooth wifi on testing if the lan is up could be done a number of ways, probably easiest to test if a static ip is assigned by the dhcp server by device mac address and just search the return string from an...

PhatFil

or buy a 2nd sd card and install the new os onto it, your original os and sd card can be used on demand.

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