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by PhatFil
Thu Mar 05, 2020 12:55 am
Forum: For sale
Topic: Aluminum case for Raspberry Pi 4
Replies: 7
Views: 4519

Re: Aluminum case for Raspberry Pi 4

Really neat looking, I can only assume that the cost reflects the engineering employed to contain a fierce fresh water fish to stop the users from damaging the sd card. Go Guard Carps.. Aluminum Micro SD Card protection carp to protect the Micro SD from the user; No wonder all my fake sd cards faile...
by PhatFil
Thu Mar 05, 2020 12:39 am
Forum: Beginners
Topic: Multiple i2c usages
Replies: 1
Views: 163

Re: Multiple i2c usages

may i suggest you check out this great little project that uses off the shelf plant pot sensors that collect data and advertise it via bluetooth ble and can consequently run for ages off a small coin cell.. https://github.com/ThomDietrich/miflora-mqtt-daemon the circa $10 per sensor cost isnt that e...
by PhatFil
Wed Mar 04, 2020 4:04 pm
Forum: C/C++
Topic: How do I send digital/binary info over wifi?
Replies: 7
Views: 737

Re: How do I send digital/binary info over wifi?

Depends on where abouts you want to focus your energies, I would opt for Mqtt as suggested above . https://github.com/eclipse/paho.mqtt.c
and https://github.com/knolleary/pubsubclient,
by PhatFil
Wed Mar 04, 2020 12:50 pm
Forum: Camera board
Topic: Flexible camera cable for pi Zero?
Replies: 3
Views: 466

Re: Flexible camera cable for pi Zero?

Image
mine is very flexible, folds double when fitting inside the official pi-0 case
by PhatFil
Wed Mar 04, 2020 12:36 am
Forum: Beginners
Topic: Small quiet fan for Labists case
Replies: 19
Views: 1838

Re: Small quiet fan for Labists case

Noctua brand fans are the goto choice for 3d printer upgrades

but they are not cheap https://www.google.com/aclk?sa=L&ai=DC ... BBF&adurl=
by PhatFil
Wed Mar 04, 2020 12:01 am
Forum: Camera board
Topic: Flexible camera cable for pi Zero?
Replies: 3
Views: 466

Re: Flexible camera cable for pi Zero?

by PhatFil
Tue Mar 03, 2020 11:27 pm
Forum: General discussion
Topic: Rasp Berry Pi, Pill Dispenser
Replies: 6
Views: 604

Re: Rasp Berry Pi, Pill Dispenser

+1 for the little 7day pill boxes and (in my case) a dedicated alarm clock.. even with them i will occasionally shake a box at the end of a week and discover a set of forgotten pills arghh!! OP fun sounding starter project as long as the above caveats are taken into account - go for it.. for the boa...
by PhatFil
Tue Mar 03, 2020 2:18 pm
Forum: Other projects
Topic: Adressable RGB connected to GPIO pins on RPI4
Replies: 16
Views: 1194

Re: Adressable RGB connected to GPIO pins on RPI4

having used ws2812 leds with 3.3v logic level control for lengths of 5m (300x leds) i would suggest trying your circuits and test code without a logic level converter to begin with as it may be totally unnecessary.
by PhatFil
Mon Mar 02, 2020 7:40 pm
Forum: Off topic discussion
Topic: Launching a Pi based product...
Replies: 3
Views: 1081

Re: Launching a Pi based product...

Good luck. It might be easiest to release the project under an open source license free for any one to replicate and open an ebay or amazon store to sell required components and kit bundles. Perhaps hold back a couple of enhanced features hinting on development opportunities Then if it becomes popul...
by PhatFil
Mon Mar 02, 2020 3:38 pm
Forum: Other projects
Topic: Adressable RGB connected to GPIO pins on RPI4
Replies: 16
Views: 1194

Re: Adressable RGB connected to GPIO pins on RPI4

look up the data sheet for your leds to check how much power they can draw, iirc each ws2812 led has 3 x 20 ma leds 1 x red 1 x blue and 1 x green so if similar your strip of 9x could draw upto 9 x 60ma at full power 540ma which should be ok for, you to draw from the +5v gpio header, and in my limit...
by PhatFil
Mon Mar 02, 2020 3:41 am
Forum: Python
Topic: Need help with Extracting data from Python script
Replies: 1
Views: 196

Re: Need help with Extracting data from Python script

excel can open remote data sources like odbc compliant databases so if your system uses one already ? If not you could use the good ol comma separated file CSV Use the import data features to open your remote data file on the pi. On the excel side you will probably need a vba script to refresh the s...
by PhatFil
Sat Feb 29, 2020 10:07 pm
Forum: Beginners
Topic: Nodemcu slave to Raspberry pi (via wifi)
Replies: 2
Views: 160

Re: Nodemcu slave to Raspberry pi (via wifi)

I use tasmota firmware on many esp826x devices. Its very handy for interfacing with all sorts of i/o and sensors and hosts its own gui web interface. You just configure whats connected to what gpio pin via the web gui and it will publish all its metrics via mqtt (a broker service you can host on a p...
by PhatFil
Sat Feb 29, 2020 2:08 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Stepping down 12V 2A to use on GPIO input
Replies: 2
Views: 303

Re: Stepping down 12V 2A to use on GPIO input

simplest solution afaik would be to use light sensitive resistors, if you can use putty or epoxy to mask off ambient light so the LDR s can only react to your specific light sources it should be pretty straight forward to monitor 10x devices 1st result for a search "LDR Pi circuit" https://pimylifeu...
by PhatFil
Sat Feb 29, 2020 2:03 am
Forum: General discussion
Topic: What OS should I choose?
Replies: 19
Views: 3295

Re: What OS should I choose?

i run the full desktop version of raspbian on my headless pi-0-w s
It has no observable impact on performance and provides a vnc server should i ever want to open a remote gui session (never needed yet beyond testing tho,,) but one day?? :mrgreen:
by PhatFil
Fri Feb 28, 2020 3:14 pm
Forum: Troubleshooting
Topic: First (and all subsequent) boot fails
Replies: 4
Views: 344

Re: First (and all subsequent) boot fails

i had a w/end of fun n games when i bought 3x 16gb sandisk sdhc cards via amazon saving about £5 the cards are identical (as far as my cataract ridden eyes can tell) to genuine cards But they were NOT!! I now buy cards from brick and mortar sellers who have a supply chain they have confidence in so ...
by PhatFil
Wed Feb 26, 2020 11:17 pm
Forum: Troubleshooting
Topic: First (and all subsequent) boot fails
Replies: 4
Views: 344

Re: First (and all subsequent) boot fails

I would start by, #1 check the download with its SHA256 checksum https://geektechstuff.com/2019/09/30/sha256-file-hash-values-and-how-to-check-them-raspberry-pi-mac-os-x-powershell/ #2 validate your sd card iirc H2testw is a good tool for this on a windows puter. #3 repeat the sd card write using ba...
by PhatFil
Wed Feb 26, 2020 10:57 pm
Forum: Beginners
Topic: Auto Boot USB (batch file) to update files in home folder
Replies: 2
Views: 175

Re: Auto Boot USB (batch file) to update files in home folder

if you use the same usb drive with a KNOWN UUID or a small set of usb drives? you can set it to auto mount and run a script to check a directory for contents and if found execute a copy. https://gist.github.com/etes/aa76a6e9c80579872e5f Should give you what you need to auto mount a drive using its U...
by PhatFil
Wed Feb 26, 2020 10:44 pm
Forum: Weather station
Topic: Recommendations for weatherstation sensor hardware in uk
Replies: 5
Views: 1332

Re: Recommendations for weatherstation sensor hardware in uk

DIY annometers and rain guages might be the way to go as a little google led me places like https://www.weathershop.co.uk/shop/accessories which indicate a pretty generouse budget might be needed for off the shelf solutions.
by PhatFil
Wed Feb 26, 2020 10:14 pm
Forum: Python
Topic: event detection response
Replies: 7
Views: 519

Re: event detection response

by PhatFil
Wed Feb 26, 2020 10:09 pm
Forum: Automation, sensing and robotics
Topic: TCP Smart Bulbs
Replies: 8
Views: 1428

Re: TCP Smart Bulbs

imho Tasmota is the best option for smart plug/device control https://tasmota.github.io/docs/#/Home
compatible h/w is listed in the wiki docs
by PhatFil
Wed Feb 26, 2020 4:09 pm
Forum: General discussion
Topic: Can a 12v relay be run using inputs from a different sensor.
Replies: 6
Views: 391

Re: Can a 12v relay be run using inputs from a different sensor.

Fyi i use the bluetooth sensors detailed in this project https://zsiti.eu/xiaomi-mijia-hygrothermo-v2-sensor-data-on-raspberry-pi/ with my pi, but as i use node red i also use the xiaomi-ble-node to query my sensors rather than python.. At circa £10-12 they are pretty good vfm imho and as they broad...
by PhatFil
Wed Feb 26, 2020 12:51 pm
Forum: Beginners
Topic: FTP(S) Server with Raspberry Pi Zero
Replies: 4
Views: 405

Re: FTP(S) Server with Raspberry Pi Zero

How many concurrent client requests do you expect? if a private server for your use and limited concurrent requests Its worth the time to test and confirm. my own limited lan testing of a pi-0-w would suggest that 10mb/s is a reasonable expectation
by PhatFil
Tue Feb 25, 2020 11:25 pm
Forum: Beginners
Topic: How to transmit data trough an access point without protocol
Replies: 11
Views: 439

Re: How to transmit data trough an access point without protocol

Most command line commands that produce cli output and terminate can have their output (stdout) redirected to a file for further programmatic analysis Using the ">" and ">>" redirect operators ">" will overwrite/create the file while ">>" will append to an existing file and create it if not there.. ...
by PhatFil
Tue Feb 25, 2020 3:10 pm
Forum: General discussion
Topic: Can a 12v relay be run using inputs from a different sensor.
Replies: 6
Views: 391

Re: Can a 12v relay be run using inputs from a different sensor.

If using to manage conditions for valuable contents i would suggest looking at more robust and reliable sensors than dht22. or at least consider the expected life and easy replacement of the sensor you use.. https://raspberrypi.stackexchange.com/questions/51139/dht22-raspberry-pi-2-3-questionable-hu...
by PhatFil
Tue Feb 25, 2020 8:36 am
Forum: Other
Topic: Error while trying to connect to mqtt using paho-mqtt [KALI]
Replies: 4
Views: 732

Re: Error while trying to connect to mqtt using paho-mqtt

To rule out problems with your creds you can try installing and hosting mosquitto mqtt broker and executing your connection and publications or/and subscriptions without the complication of the security.

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