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by jbudd
Sun Apr 01, 2018 10:46 am
Forum: General discussion
Topic: Yellow lightning icon
Replies: 32
Views: 4748

Re: Yellow lightning icon

On a recent trip to the humid tropics I noticed several USB cables with apparently tarnished ends and which would not power my Pi. Not only that but some USB cables and PSU I took with me failed to do the job. It seems like the electricity abroad is less eager in the heat and humidity (dual AC volta...
by jbudd
Sun Apr 01, 2018 9:54 am
Forum: Android
Topic: Factory Reset
Replies: 2
Views: 2763

Re: Factory Reset

The Raspberry Pi's operating system is on the SD card, not stored in the Pi itself.

So all you have to do is copy your Android OS onto the card exactly the same way you did it before and there you hae it - a "Factory Reset"
by jbudd
Sat Mar 31, 2018 11:08 pm
Forum: General discussion
Topic: how to measure the distance (up to 40 feet) of a walking person
Replies: 1
Views: 394

Re: how to measure the distance (up to 40 feet) of a walking person

This http://www.icstation.com/cdm324-24ghz-m ... -8962.html claims an effective range of 15 metres. But it's 5V so you can't connect it directly to the Pi GPIO pins.
by jbudd
Sat Mar 31, 2018 10:14 am
Forum: Beginners
Topic: Steps to connect 1 raspberry pi 3 with 2 arduinos wirelessly using wifi
Replies: 6
Views: 785

Re: Steps to connect 1 raspberry pi 3 with 2 arduinos wirelessly using wifi

I use Mosquitto to run an MQTT broker on my Raspberry Pi. Rather than Arduinos I use ESP8266s to run sensors and send the readings by MQTT (An ESP8266 development board costs half as much as an Arduino, runs Arduino code and has built in wifi. I'm sure there must be disadvantages too.) And to wire t...
by jbudd
Fri Mar 30, 2018 2:44 pm
Forum: Beginners
Topic: Help with running BASH script from cmd line
Replies: 7
Views: 1086

Re: Help with running BASH script from cmd line

It looks like you have somehow got an MSDOS formatted version of the script onto your Pi. The "\r" carriage return characters are not needed in Linux and confuse Bash. You can try to convert the file to Linux format like this: sudo apt-get install dos2unix dos2unix hs100.sh Then try to run it again....
by jbudd
Fri Mar 30, 2018 2:25 pm
Forum: Troubleshooting
Topic: Please help me with my headless Raspberry Pi Zero W WiFi Setup
Replies: 15
Views: 15034

Re: Please help me with my headless Raspberry Pi Zero W WiFi Setup

What sort of encryption does your wifi network use? The wpa_supplicant.conf file needs different data for the different types. Simplest and most common for home networks is WPA/WPA2 PSK For these networks it should look like this (change the ssid and psk strings to match your router!): ctrl_interfac...
by jbudd
Wed Mar 28, 2018 6:59 pm
Forum: Beginners
Topic: which pi?
Replies: 5
Views: 677

Re: which pi?

Seems like the Pi Zero W is the obvious choice. It takes less electricity than the others, which could be important since the chickens don't have proper electrical service. But bear in mind that the onboard wifi probably doesn't have the same range as a plug-in dongle. So you could be better off wi...
by jbudd
Wed Mar 28, 2018 6:49 pm
Forum: General discussion
Topic: Wont autologin in first headless boot
Replies: 4
Views: 726

Re: Wont autologin in first headless boot

network={ ssid=“{my ssid}” psk=“{my passwd}” key_mgmt=WPA-PSK scan_ssid=1 } Perhaps it's just an artifact of how you posted the code in this forum, but I don't like the look of your double quotes - they look like word processor quotes rather than good ole PC keyboard shift 2 (on a UK keyboard anywa...
by jbudd
Tue Mar 27, 2018 11:19 pm
Forum: General discussion
Topic: How expensive does "The Pi Bug" get?
Replies: 32
Views: 4032

Re: How expensive does "The Pi Bug" get?

What? You're not going to be the first non-Brazilian to own a blue Pi3B+?
There are no plussies on filipeflop yet. Luckily. Or sadly.

I wonder how quickly they can turn around their production line.
by jbudd
Mon Mar 26, 2018 10:48 pm
Forum: General discussion
Topic: How expensive does "The Pi Bug" get?
Replies: 32
Views: 4032

Re: How expensive does "The Pi Bug" get?

I'm currently in Brazil, and the only thing that has saved me from lashing out £50 (£50 !!!) on a Raspberry Pi with a blue PCB is the very timely release at home of the Pi 3B+.

So I reckon the RPF has saved me £16 this month. Thanks!
by jbudd
Mon Mar 26, 2018 9:58 am
Forum: Beginners
Topic: How to send mysql data to internet on another router
Replies: 1
Views: 210

Re: How to send mysql data to internet on another router

At least one end of your communication needs to be visible from the internet. Your public facing IP address probably changes from time to time, so you need to use a dynamic DNS service such as duckdns.org. You need a mechanism to tell duckdns.org whenever your external IP address changes. Then (for ...
by jbudd
Sun Mar 25, 2018 5:26 pm
Forum: Beginners
Topic: Connect several esp8266
Replies: 3
Views: 368

Re: Connect several esp8266

You could also consider using an old smart phone as the access point since it has built-in ability to send SMS.

For communication between ESP8266 and Raspberry Pi, I recommend MQTT, and Node-Red as a visual programming environment to wire sensor, Pi and phone together
by jbudd
Sun Mar 25, 2018 5:22 pm
Forum: Beginners
Topic: Connect several esp8266
Replies: 3
Views: 368

Re: Connect several esp8266

Yes it's possible.

https://www.raspberrypi.org/documentati ... s-point.md
by jbudd
Sat Mar 24, 2018 8:33 pm
Forum: Troubleshooting
Topic: Please help me with my headless Raspberry Pi Zero W WiFi Setup
Replies: 15
Views: 15034

Re: Please help me with my headless Raspberry Pi Zero W WiFi Setup

Mohitpower, have you really been struggling to connect to your Pi since 4th February? That must be extremely frustrating. As you were advised then, it's better to start a new thread than add your problem to the end of someone else's. We will be better able to help you if you try to understand and an...
by jbudd
Sat Mar 24, 2018 11:17 am
Forum: General discussion
Topic: Can this power 5 Pis
Replies: 6
Views: 792

Re: Can this power 5 Pis

I have been using and recommending the Anker 40W and 60W USB chargersfor quite a while. I have always found them capable of powering my (headless) Raspberry Pis as well as charging cell phones etc. However I was recently startled to see the red LED flickering on a Pi 3B with a Pimoroni Displayotron ...
by jbudd
Fri Mar 23, 2018 12:36 pm
Forum: Beginners
Topic: Not able to obtain the ip of the pi
Replies: 6
Views: 701

Re: Not able to obtain the ip of the pi

The best way to set a static IP address is to reserve the address in your router setup pages. But if you cannot do that (eg it's not your router) then with Stretch it should be done in /etc/dhcpcd.conf NOT in /etc/network/interfaces. You would be well advised to remove the changes you made to /etc.n...
by jbudd
Fri Mar 23, 2018 10:35 am
Forum: Beginners
Topic: Use Wifi in latest raspbian lite stretch in headless mode
Replies: 72
Views: 34254

Re: Use Wifi in latest raspbian lite stretch in headless mode

FTFY
Acronym for "fixed that for you."

Often used sarcastically - not to fix an honest mistake, but to sarcastically disagree with someone.
TGFUD!
by jbudd
Fri Mar 23, 2018 12:03 am
Forum: General discussion
Topic: stopping for a rest
Replies: 26
Views: 2319

Re: stopping for a rest

How often does it stop? Linux might well swap your processes in and out as it keeps on top of it's mysterious housekeeping jobs. 30 seconds seems like a long rest though. You could run "top" to try and spot what's using system resources instead. It's (probably - never done it with Raspbian) possible...
by jbudd
Thu Mar 22, 2018 7:33 pm
Forum: Beginners
Topic: Not able to obtain the ip of the pi
Replies: 6
Views: 701

Re: Not able to obtain the ip of the pi

What operating system are you using?
What file is that?
Where did you see the instructions to change that file?
Are you trying to set up a static IP address?
Have you read https://www.raspberrypi.org/documentati ... ess-cli.md?
by jbudd
Wed Mar 21, 2018 7:28 pm
Forum: Troubleshooting
Topic: Zero USB Ethernet
Replies: 3
Views: 469

Re: Zero USB Ethernet

It works for me.(Not Raspbian lite)

Does the ssh file get deleted from /boot?
by jbudd
Tue Mar 20, 2018 11:45 am
Forum: General discussion
Topic: Little cardboard boxes
Replies: 9
Views: 1203

Re: Little cardboard boxes

Reminds me of Shroedinger's James Bond DB5. A priceless, pristine and unopened cardboard box that may (or may not) contain a Corgi Aston Martin model.
by jbudd
Sat Mar 17, 2018 1:21 pm
Forum: General discussion
Topic: pi3b+ needs a beefier power supply than the pi3b
Replies: 61
Views: 19867

Re: pi3b+ needs better power supply

Edit - oops, should have read page 2 before I posted this! I think some devices - eg iphones? have a way of telling some "Smart chargers" that they can accept high charge current and / or voltage? Qualcomm Quick Charge, etc(?) I have a "Smart" USB power pack 2.1A / 2.4A that could fast charge a rece...
by jbudd
Sat Mar 17, 2018 12:23 pm
Forum: Beginners
Topic: Pi as heating/elec failure alarm
Replies: 27
Views: 3001

Re: Pi as heating/elec failure alarm

An example of using environment variables in the message subject and body in a Bash script: #! /bin/bash RECIPIENT=myname@gmail.com # set a subject - eg my external ip address SUBJECT="My IP Address is "$(wget -qO- http://bot.whatismyipaddress.com/ ) #BODY is a multi line environment variable (enclo...
by jbudd
Fri Mar 09, 2018 4:11 pm
Forum: Troubleshooting
Topic: Tutorial for MQTT on Raspbian Jessie?
Replies: 41
Views: 63129

Re: Tutorial for MQTT on Raspbian Jessie?

For installing or using mqtt?
by jbudd
Fri Mar 09, 2018 10:58 am
Forum: General discussion
Topic: Looking for Long Range Omnidirectional Antenna
Replies: 10
Views: 1995

Re: Looking for Long Range Omnidirectional Antenna

500m omnidirectional seems rather ambitious. ModMyPi sell this "ultra long range" gizmo https://www.modmypi.com/raspberry-pi/communication-1068/wifi-wireless-1070/wifi-dongle-ultra-long-range-high-gain-w-5dbi-antenna . They say they have tested it to 100m. It should be possible to link Pi to Pi over...

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