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by PhatFil
Fri Mar 09, 2018 8:28 pm
Forum: For sale
Topic: Hub for Pi Zero with Pogo Pins on sale for $5
Replies: 16
Views: 9319

Re: Hub for Pi Zero with Pogo Pins on sale for $5

Nothings arrived yet, i remain optimistic 'somewhat?' :(
by PhatFil
Wed Mar 07, 2018 8:07 pm
Forum: General discussion
Topic: Wifi connection from bluetooth
Replies: 8
Views: 900

Re: Wifi connection from bluetooth

with a little script on the client computer sat monitoring its virtual serial connections you could establish a b/tooth serial link and transfer the requested information when requested by the pi. http://www.raspberry-projects.com/pi/pi-operating-systems/raspbian/bluetooth/serial-over-bluetooth a mo...
by PhatFil
Tue Mar 06, 2018 12:30 am
Forum: General discussion
Topic: UPS solutions?
Replies: 21
Views: 2761

Re: UPS solutions?

i finally landed on this which looks like an ideal solution for me.. https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=50470 Note that the calculation for R1 in the circuits shown on the first page of the linked topic (the 2-cell version) gives the right result for the wrong reason. :o The co...
by PhatFil
Mon Mar 05, 2018 10:45 pm
Forum: General discussion
Topic: UPS solutions?
Replies: 21
Views: 2761

Re: UPS solutions?

My google searches have mostly included 'DIY' and perhaps 'low budget' too, And the vast majority of solutions appear to be a case of repurposing battery power banks that allow concurrent charge/discharge.. http://raspi-ups.appspot.com/en/index.jsp even Pete scargills dogs dinner-> Kitchen sink -> s...
by PhatFil
Sun Mar 04, 2018 12:35 am
Forum: General discussion
Topic: UPS solutions?
Replies: 21
Views: 2761

UPS solutions?

With my Pi project satisfying its initial testing, Installation is now my focus, and i am considering UPS options. And i am more than a little confused. My perception of a UPS is a box that provides power to important devices and maintains a backup supply, generally a battery to provide sufficient p...
by PhatFil
Sat Mar 03, 2018 6:32 pm
Forum: Beginners
Topic: Raspberry Pi3 B - problem reading input from sensor
Replies: 9
Views: 1354

Re: Raspberry Pi3 B - problem reading input from sensor

is this how your employing the shield?
http://robofun.eu/?product=sensor-shield-v4-raspberry

if so at what stage does your result differ from the walk through
by PhatFil
Sat Mar 03, 2018 4:48 pm
Forum: Beginners
Topic: Is my Raspberry Pi original version still relevant for purchasing add ons etc?
Replies: 8
Views: 2164

Re: Is my Raspberry Pi original version still relevant for purchasing add ons etc?

Imho grab a Pi3 or Zero-W with the built in wifi and bluetooth it may be a better hook to gain interest in the subject. providing a more complete platform out of the box. Im sure when he is actively engaged in programming and building the original pi will find a productive roll too.
by PhatFil
Sat Mar 03, 2018 4:04 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Installing Raspbian on old computer
Replies: 4
Views: 2282

Re: Installing Raspbian on old computer

lots of light weight *nix operating systems, are available that will allow you to install and run just what you need.
puppy linux might be worth a look. http://puppylinux.org/main/Overview%20a ... tarted.htm
by PhatFil
Sat Mar 03, 2018 3:34 pm
Forum: Beginners
Topic: Raspberry Pi3 B - problem reading input from sensor
Replies: 9
Views: 1354

Re: Raspberry Pi3 B - problem reading input from sensor

er if the lcd experiment preceded the dht11 testing, it may have damaged he pi s gpio interface (NOW I AM WAY OUT OF MY DEPTH WITH pi SPECIFICS) a bit of basic is it on and off when expected testing on the specific gpio pins used may be advisable, pull the pins to ground with a high resistance resis...
by PhatFil
Sat Mar 03, 2018 3:28 pm
Forum: Beginners
Topic: Raspberry Pi3 B - problem reading input from sensor
Replies: 9
Views: 1354

Re: Raspberry Pi3 B - problem reading input from sensor

Your arduino h/w will PROBABLY? be expecting 5v signals on the data lines as well as 5v vcc and if it throws any 5v data signals down the wire to the pi s gpio pins which are rated for 3.3v you could cause some damage? (probably ok but pull asap and check your h/w specifics).. Logic level shifters a...
by PhatFil
Sat Mar 03, 2018 1:46 am
Forum: Beginners
Topic: Raspberry Pi3 B - problem reading input from sensor
Replies: 9
Views: 1354

Re: Raspberry Pi3 B - problem reading input from sensor

your dht sensor interface board has mosi and miso labels indicating its using the spi interface, have you enabled that ? if not at a terminal prompt enter sudo raspi-config and select the interfacing option. You should find learning python scripting on a pi has a similar learning curve to arduino pr...
by PhatFil
Sat Mar 03, 2018 1:31 am
Forum: General discussion
Topic: Can't get vanilla wifi to work on Stretch
Replies: 15
Views: 2595

Re: Can't get vanilla wifi to work on Stretch

In my limited experience installing stretch on a pi-zero-w and failing to connect to wifi without any reason for a few hours a reboot of the router/ap resulted in success. if as suggested earlier the issue surrounds the receipt or issue of a dhcp licence? You could try assigning a static ip with app...
by PhatFil
Fri Mar 02, 2018 7:48 pm
Forum: General programming discussion
Topic: Fastest programming language on pi zero ?
Replies: 24
Views: 5362

Re: Fastest programming language on pi zero ?

what do you think the results would indicate? have you a project in mind that requires minimal latency?
by PhatFil
Thu Mar 01, 2018 8:46 pm
Forum: Troubleshooting
Topic: Flric case gave me a shock
Replies: 4
Views: 401

Re: Flric case gave me a shock

a quick paint on insulator available in most homes is nail varnish, give your pi a brush over from some donated nail varnish in all areas you suspect may be shorting on the case. let it dry fully before refitting and testing..
by PhatFil
Thu Mar 01, 2018 8:01 pm
Forum: Troubleshooting
Topic: Trash characters when trying to send strings over /dev/ttyAMA0 between two zeros.
Replies: 4
Views: 343

Re: Trash characters when trying to send strings over /dev/ttyAMA0 between two zeros.

whoops yes its a voltage divider, i did a quick google for 'raspberry pi pull up Tx' which revealed a few pages detailing pull up resistors on the sbc side of a uart/usb connection and that was the first page including a pi.. reducing the transmission speed and twistiing the rx and tx wires into a t...
by PhatFil
Thu Mar 01, 2018 8:00 pm
Forum: Troubleshooting
Topic: Trash characters when trying to send strings over /dev/ttyAMA0 between two zeros.
Replies: 4
Views: 343

Re: Trash characters when trying to send strings over /dev/ttyAMA0 between two zeros.

whoops yes its a voltage divider, i did a quick google for 'raspberry pi pull up Tx' which revealed a few pages detailing pull up resistors on the sbc side of a uart/usb connection and that was the first page including a pi.. reducing the transmission speed and twistiing the rx and tx wires into a t...
by PhatFil
Thu Mar 01, 2018 7:30 pm
Forum: Troubleshooting
Topic: Trash characters when trying to send strings over /dev/ttyAMA0 between two zeros.
Replies: 4
Views: 343

Re: Trash characters when trying to send strings over /dev/ttyAMA0 between two zeros.

is this with the first exchange of text only? i had a similar issue connecting to a set of scales with a serial/usb interface, the first line of coms always started with garbage, the solution was to discard the first exchange and simply issue a 2nd query after which things were fine.. if its happeni...
by PhatFil
Thu Mar 01, 2018 6:14 pm
Forum: Beginners
Topic: Multiple output power supply / power bank
Replies: 5
Views: 701

Re: Multiple output power supply / power bank

well spotted i should have said Can have 12v and 5v usb outputs..
by PhatFil
Thu Mar 01, 2018 6:12 pm
Forum: Beginners
Topic: Proper way of extending cable range of water sensor LM393?
Replies: 27
Views: 2012

Re: Proper way of extending cable range of water sensor LM393?

Or an accelerometer sat on a float could detect a few mm rise in height ;) the excellent ispindle floating wifi hydrometer project uses a GY-521 break out board for an mpu 6050 3 axis accelerometer which can detect minor fluctuations in its angle when floating to indicate the specific gravity of the...
by PhatFil
Thu Mar 01, 2018 5:52 pm
Forum: Troubleshooting
Topic: realterm on raspberry
Replies: 1
Views: 653

Re: realterm on raspberry

point realterm at your pi computer just the same you would point any terminal emulator.use the ip or hostname if your using it to connect via wifi/lan/ssh point it at port 22 if its telnet port 23 to enable this on the pi execute sudo raspi-config at the command prompt https://thepi.io/how-to-ssh-in...
by PhatFil
Thu Mar 01, 2018 5:22 pm
Forum: Beginners
Topic: Proper way of extending cable range of water sensor LM393?
Replies: 27
Views: 2012

Re: Proper way of extending cable range of water sensor LM393?

steer clear of dht11 humidity/temp sensors, they are not very accurate, ams23/dht22 sensors have better accuracy but can have a limited lifespan so if you use them consider the ease of switching out if necessary. the BMP280 sensor provides lots of information including a humidity reading.. for tempe...
by PhatFil
Thu Mar 01, 2018 4:52 pm
Forum: Beginners
Topic: Multiple output power supply / power bank
Replies: 5
Views: 701

Re: Multiple output power supply / power bank

the power banks sold for helping start cars with flat batteries have both 5v and 12v dc output sockets built in, and if bought from a legitimate reseller and you pay the full premium price you should get something with a very high capacity and long life battery. a mainstream UK re-seller supplies th...
by PhatFil
Thu Mar 01, 2018 4:37 pm
Forum: General discussion
Topic: MQTT installation on Stretch fixed?
Replies: 14
Views: 15240

Re: MQTT installation on Stretch fixed?

open a terminal window or putty session if running headless and type sudo apt-get update sudo apt-get upgrade -y sudo apt-get install mosquitto sudo apt-get install mosquitto-clients to install mosquitto mqtt broker and clients then to test its all ok, type mosquitto_sub –d –t mqtt-test this will si...
by PhatFil
Thu Mar 01, 2018 4:28 pm
Forum: General programming discussion
Topic: Manually start an auto start program
Replies: 5
Views: 1184

Re: Manually start an auto start program

If yuor using the systemdaemon controller to autostart your program check out the 'systemctl status' command to see whats running

if yu find your program listed yu can look into using systemctl start and stop commands to halt while you run interactively..
by PhatFil
Thu Mar 01, 2018 4:20 pm
Forum: Beginners
Topic: Pi Possibilities?
Replies: 10
Views: 937

Re: Pi Possibilities?

Power On could be a simple switch on the power line to the pi, you can buy usp powercables with switches inline. HOWEVER Turning off the device should be performed by a system shutdown command to enable the system to close properly otherwise you will risk sd card file corruption. a BIG RED button wi...

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