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by anita2r
Thu Sep 22, 2016 4:03 pm
Forum: Other projects
Topic: Security camera Software?
Replies: 26
Views: 19068

Re: Security camera Software?

Hi, Using two ssh links is somewhat outside my experience! but three questions: 1. Is the Pi on the same network as the server 2. Why is the Pi using point to point protocol - what is it connected to? 3. -R in your autossh line means that you are setting up a reverse tunnel - was that what you inten...
by anita2r
Thu Sep 22, 2016 12:55 pm
Forum: Other projects
Topic: Security camera Software?
Replies: 26
Views: 19068

Re: Security camera Software?

Hi, This part of the ssh command: -L 16090:192.168.0.135:8090 links the remote Pi to a local port. Replace 192.168.0.135 with your Pi's address Replace 8090 with the port that motion is using (8081) Now your local port 16090 is connected to the Pi's 8081 port To view the stream enter the 'localhost'...
by anita2r
Sat Jan 23, 2016 3:19 pm
Forum: Networking and servers
Topic: Samba has stopped working but I can still SSH
Replies: 7
Views: 923

Re: Samba has stopped working but I can still SSH

Hi, If you look at this article: https://wiki.debian.org/NetworkConfiguration#Configuring_the_interface_manually and search for 'inet manual' you will see that this configuration does not allocate an ip address to the interface. So it looks as though your problem is with the network interface rather...
by anita2r
Fri Jan 22, 2016 12:14 am
Forum: Networking and servers
Topic: Help with ideas for project connectivity
Replies: 14
Views: 1800

Re: Help with ideas for project connectivity

and I wouldn't buy a tablet just to view and control a network of temperature sensors. There is probably nothing in the computer industry that is so oversupplied and therefore dirt cheap than tablets, phablets and mobile phones. Especially the first and last of these. Why wouldn't you take advantag...
by anita2r
Thu Jan 21, 2016 11:40 pm
Forum: Other projects
Topic: Raspberry Pi-controlled Relay/Switch - low power options?
Replies: 7
Views: 2112

Re: Raspberry Pi-controlled Relay/Switch - low power options

For the bulb, this has it's own power supply (still TBC but likely to be a few 9v batteries joined together) so while not 'high voltage' (or even 'mains voltage') it maybe needs to be more robust than the switch for the camera (and will need to be activated for much longer periods of time). And yes...
by anita2r
Thu Jan 21, 2016 11:27 pm
Forum: Networking and servers
Topic: Help with ideas for project connectivity
Replies: 14
Views: 1800

Re: Help with ideas for project connectivity

As to MQTT and wifi access point software, I cannot comment as I have no knowledge of MQTT. Does MQTT include access point software would be my first question - what does its documentation say. You are mixing up your network layers. WiFi is a layer 1 protocol because it's equivalent to getting two ...
by anita2r
Thu Jan 21, 2016 11:03 pm
Forum: Networking and servers
Topic: Help with ideas for project connectivity
Replies: 14
Views: 1800

Re: Help with ideas for project connectivity

The main node in the network has a wifi dongle attached. Do I need to run Wifi Access point software AND MQTT broker in order to receive data from other wifi nodes? The Tablet is cheaper and faster time to market than A 7" display, an enclosure, a Pi, a Wfif dongle and write the code for connectivi...
by anita2r
Thu Jan 21, 2016 9:45 pm
Forum: Networking and servers
Topic: Help with ideas for project connectivity
Replies: 14
Views: 1800

Re: Help with ideas for project connectivity

Hi, The idea is people having access to the information locally as well as on web. and I am looking for the simplest way to form a network of Rpis at a location - no internet required, no firewall Well if you have no internet connection, you won't be able to let people access the information from th...
by anita2r
Thu Jan 21, 2016 1:31 am
Forum: Advanced users
Topic: Need help with a project!
Replies: 2
Views: 730

Re: Need help with a project!

Hi,

You just need an analogue to digital converter (ADC) chip.

The MCP3208, for example, can be interfaced with a Pi, using the Pi's SPI pins. This chip can convert eight analog inputs to digital values for the Pi to use.

Regards

anita2R
by anita2r
Wed Jan 20, 2016 6:02 pm
Forum: Automation, sensing and robotics
Topic: Problem with relay control
Replies: 1
Views: 596

Re: Problem with relay control

Hi, I think that the Red LED on your Pi is the power indicator. edit : did you mean the red led on the Pi or are you referring to a red led on the relay board If it's a led on the relay board - ignore my comments about power supply! end of edit If it is going out after you turn on the relay, there i...
by anita2r
Wed Jan 20, 2016 5:09 pm
Forum: Networking and servers
Topic: Help with ideas for project connectivity
Replies: 14
Views: 1800

Re: Help with ideas for project connectivity

Hi, You could use your server as a router and set it up to act as a DHCP provider, then you just need a wireless access point. You may be able to do that with a wifi dongle on the server, but that's not something I have done. Perhaps someone else can answer that. I do use my server (actually a banan...
by anita2r
Wed Jan 20, 2016 1:57 am
Forum: Networking and servers
Topic: Help with ideas for project connectivity
Replies: 14
Views: 1800

Re: Help with ideas for project connectivity

Hi, There are lots of possible configurations. This is my idea for a setup: A. One Pi as a server and web server. This would have a drive partition setup to hold all the data centrally, with a folder or folders made available as nfs shares. nfs is a linux file system which enables ownerships, permis...
by anita2r
Tue Jan 19, 2016 10:25 pm
Forum: Other projects
Topic: Raspberry Pi-controlled Relay/Switch - low power options?
Replies: 7
Views: 2112

Re: Raspberry Pi-controlled Relay/Switch - low power options

Hi, As you are power conscious, don't use relays. Instead use transistors to do the switching. Common transistors can be used to turn on led lights without complicated circuits. I use one of my Pi's to turn on an LED light that contains about a dozen standard LED's run from 5 volts. No relay is requ...
by anita2r
Tue Jan 19, 2016 4:31 am
Forum: Automation, sensing and robotics
Topic: TUTORIAL: DS18B20 temp sensor. No C or Python!!! Cost: $3.05
Replies: 81
Views: 106484

Re: TUTORIAL: DS18B20 temp sensor. No C or Python!!! Cost: $

... These are the notes I have so far on the grep command: roomtemp=$(cat /sys/bus/w1/devicecs/28-0000072f9386/w1_slave | grep -E -o ".{0,0}=.{0,5}" | cut -c 3-) Hi. Another way to get the temperature is to use the two 'commands' grep and awk grep allows you to get only the line containing the temp...
by anita2r
Mon Jan 11, 2016 12:30 am
Forum: Automation, sensing and robotics
Topic: Pi temperature sensors
Replies: 1
Views: 960

Re: Pi temperature sensors

Hi, To start you off: Your temperature sensor is a variable resistor. Connect 5 volts to one end of it and connect the other end to 0 volts (ground) through a fixed resistance. The point at which the temperature sensor and the fixed resistor join will have a voltage that varies with temperature. The...
by anita2r
Sun Jan 10, 2016 3:07 am
Forum: Automation, sensing and robotics
Topic: Sensing sump pump activity
Replies: 7
Views: 1944

Re: Sensing sump pump activity

... I particularly want to know if the pump is stuck in "on" state for any extended length of time ... Thanks Hi, Not a pump monitor as such, but ... There are two failure states: 1. High water level 2. Low water level Causes: 1 High: power failure pump failure float valve fails 'off' float valve m...
by anita2r
Fri Jan 08, 2016 4:00 am
Forum: Networking and servers
Topic: NAS with 16 TB
Replies: 4
Views: 5090

Re: NAS with 16 TB

Hi Guys, I have a crazy plan to configure a NAS with Ras Pi 2. Here is my thought to connect 4 * 4 TB internal HDD drives in a computer case and power them using SMPS(450w) and convert the SATA to USB or IDE to USB Hello, As our canny lad Dougie says, you will have a real bottleneck on data as the ...
by anita2r
Fri Jan 08, 2016 3:33 am
Forum: Networking and servers
Topic: RPi as SSH server
Replies: 10
Views: 2214

Re: RPi as SSH server

Hi, If you want to connect to your home system via ssh (I do that), then there are several situations that may apply: 1. Your ISP provides you access via a dynamic ip address. This means that your external ip address, that is the one that is accessible from the internet, may change. Often it remains...
by anita2r
Fri Jan 08, 2016 2:42 am
Forum: Networking and servers
Topic: Is it ok for HDD to spin continually?
Replies: 2
Views: 697

Re: Is it ok for HDD to spin continually?

Hi, When you say that you have the system drive also on the hard drive, does this mean that /var is on the same hard drive. If so, there will be regular log activity from the OS. Look at time stamps on the /var/log/syslog file for example. Samba will also be logging to to the /var/log folder - /var/...
by anita2r
Thu Jan 07, 2016 4:41 pm
Forum: Advanced users
Topic: Multiple Partitions on an SD card
Replies: 13
Views: 5317

Re: Multiple Partitions on an SD card

Hi, if you have a spare usb and a x86 'desktop' or 'laptop' computer look up how to create "bootable usb live with persistent file" Yes, I have used the live usb stick with persistent file - I keep one with me - just in case, but it hadn't occurred to me that the OS was read only - you live and lear...
by anita2r
Thu Jan 07, 2016 3:00 am
Forum: Advanced users
Topic: Multiple Partitions on an SD card
Replies: 13
Views: 5317

Re: Multiple Partitions on an SD card

A new user is unlikely to have back-up batteries I did not intend to suggest that a (new) user should have a battery backup. Indeed my comment only says that my Pi was running from a battery (I am not using a battery backup system). I indicated that my 6 months plus running a Pi was on a battery, s...
by anita2r
Wed Jan 06, 2016 4:06 am
Forum: Advanced users
Topic: Having Raspbian run startup scripts from the /boot partition
Replies: 10
Views: 3025

Re: Having Raspbian run startup scripts from the /boot parti

Hi, I have probably completely missed the point of your issue ... but why not create one fully configured, fully working system and then use 'DD' to copy the complete working system on the SD card to a new SD card (& repeat as required for further SD cards), then plug the new SD cards into the Pi's ...
by anita2r
Wed Jan 06, 2016 3:48 am
Forum: Advanced users
Topic: Multiple Partitions on an SD card
Replies: 13
Views: 5317

Re: Multiple Partitions on an SD card

... I am looking for a 'How to" tutorial on how to create multiple partitions on a Raspberry Pi SD card.... The long term plan is that the OS will be reliable and able to withstand power cuts etc Hi, It is possible to have long-term stability with the Pi using Raspbian, without trying to make the O...
by anita2r
Tue Jan 05, 2016 2:54 am
Forum: Networking and servers
Topic: NAS 24/7
Replies: 25
Views: 4586

Re: NAS 24/7

What do you mean You will need at least to specify user and group in the options sections If you decide to format a drive with microsoft's ntfs file system and then mount it on a Linux operating system, such as raspbian, you need to provide information that Linux needs but Microsoft ntfs does not p...
by anita2r
Mon Jan 04, 2016 5:43 pm
Forum: Networking and servers
Topic: NAS 24/7
Replies: 25
Views: 4586

Re: NAS 24/7

You Said you where assuming the system on the hard drive its NTFS so instead of ext4 i would put ntfs-3g right If you are setting up a drive on a Pi, why would you use NTFS? ext4 is native to Linux and provides lots of functionality that you won't get with a microsoft file system (ntfs). If you do ...

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