Raspberry Pi Forums

chorlton2080

Many thanks. You were right: pi@Inky:~/scripts/webinky $ ls msg.txt -l -rw-r--r-- 1 pi pi 40 Jan 24 21:19 msg.txt pi@Inky:~/scripts/webinky $ sudo find / -name msg.txt find: â/run/user/1000/gvfsâ: Permission denied /root/msg.txt /home/pi/scripts/webinky/msg.txt pi@Inky:~/scripts/webinky $ sudo ls /r...

chorlton2080

I have a Python webserver ( msgserver.py ) open which uses Cron to start at boot, accepts messages from a served webpage, and stores the message to a file. Every 5 mins, a separate Python script ( msgdisplay.py ) is called which displays the last message entered on an InkyPhat. Everything works. How...

chorlton2080

Thank you. I'm still stuck in my Python 2.7 ways, and hadn't noticed Thonny was defaulting to Python 3.

chorlton2080

Hello Following a system call to return data, I have placed the string into an index, thus: p=subprocess.Popen(arg,shell=True,stdout=subprocess.PIPE) data = p.communicate() split_data = data[0].split() I know this has worked, because on debugging the index appears in a variable: b'default', b'via', ...

chorlton2080

Hi folks I'm using the PS3 sixaxis controller with Retropie on a Raspberry Pi 3. The driver warns that this will disable the provided Bluetooth driver in the Raspbian distribution. It's fine and works well. However, does anyone know how to enable the standard driver at a future date (without a fresh...

chorlton2080

I purchased the Amiga Forever Plus pack a while ago, which comes with a set of Kickstart ROMs. The Cloanto webpage suggests that the supplied ROMs should work with Linux versions for UAE, but I am struggling. I have the version of UAE4All as supplied with the RetroPie project. Selection of any ROM c...

chorlton2080

I thought it was a tight fit. Just noticed that the pins in the USB socket are bent on both A+'s. Looks like from other posts this is a common problem.

chorlton2080

Hi folks. It's there any reason why the A+ isn't able to power-up (or otherwise fail to start) the popular Edimax EW-7811UN dongle? The interface works in every other Pi I have (all variants), but in neither of two A+'s. Note that I have the Unicorn Hat fitted but not activated. Using the official P...

chorlton2080

No. It is connected to the USB port of the router (which runs an ARM Linux) and is then available as a shared printer on my Windows boxes - which is my ultimate aim.

chorlton2080

What I can't understand is that I CAN get this to work by connecting to my Asus router using the LPR protocol. The Asus router is running Linux on an ARM processor! I can't, however, get this working on my Pi.

chorlton2080

Now solved using the answer above. Thanks to both of you for your assistance.

chorlton2080

DirkS wrote:Can you post examples of 'output' and also of 'matches.group(1)' which is the value that is actually converted.

Gr.
Dirk.

Struggling to copy out of JuiceSSH on my mobile. The latest 'output' contains text including '-1.8C'; 'matches.group(1)' reports it as '1.8'.

chorlton2080

matches = re.search("Temp =\s+-([0-9.]+)", output) Match the minus sign inside the grouping parentheses, so that it is included in the string that is converted to float. You do not need two separate cases because you can make the sign optional by following it with a question mark: matches...

chorlton2080

Hello folks Until this month, my outdoor DHT22 temperature/humidity monitor has been working fine. However, with the cold weather, and temperatures now sub-zero, I've noticed that my routine is failing to handle negative temperatures - instead they are represented as being positive: the sign has bee...

chorlton2080

Hello folks I have four Edimax EW-7811un USB WiFi adapters in use on my Pi's. All are installed with Raspian with no changes to the default wireless config. When connected to laptops and using 'iperf', I regularly see LAN transfer rates of ca. 20Mbit/s. Great, but not spectacular given I'm using an ...

chorlton2080

Hi Folks I would like to transfer certain sensor data from the networked Pi I have in the garden for display on a headless Pi with an LCD segmented display. At present the data is being sent to Google Sheets. What is the simplest way, using Python if possible, to send, recieve and interpret network ...

chorlton2080

Thanks: I couldn't get lpr to work.

chorlton2080

Hello Folks Can anyone explain how to configure CUPS to print to my unsupported (Canon LBP2900i) laser printer using the source computer's Windows driver? I'm expecting that it should be possible to simply pass-through the raw data unchanged to the printer connected to the RPI's USB port. It may be ...

chorlton2080

I have a tumble dryer with basic timer settings that I recently decided to control using a Pi and a DHT22 temp/humidity sensor positioned in the exhaust vent. The Pi emails and activates a wireless doorbell when the clothes are regarded as being dry, which is often much sooner than the timer guides ...

chorlton2080

Folks For those who asked me to share the working code, sorry about the delay. I'm using this to reboot the Pi (really as a test in calling basic shell commands) and in running Python scripts: both triggered by email. Remember to use the full path (including for shell commands). This is much better ...

chorlton2080

I don't use port 22, still wouldn't want to leave it open unnecessarily.

How could processing an email from a known sender, then opening a port, be a security problem, given that leaving the port open all the time appears to be advocated by the above responses?

chorlton2080

Which fix? Please elaborate

chorlton2080

Can I make a suggestion that people try a different approach to control remote sockets? I've found it easier to use the original socket remote and trigger the button contacts using opto-isolators connected to the GPIOs. I've had complete success with sockets and remote doorbells acting as audible al...

chorlton2080

Hello folks. I'm wary about leaving ports permanently open on my router to allow SSH connection to my Pi's from outside the LAN. Is it possible to open ports on demand using UPnP, initiated by the Pi and perhaps following receipt of an email? I know how to get the Pi to respond to emailed commands. ...

chorlton2080

Thanks for the link and the advice. I'm now able to issue a deliberately limited set of instructions to my Pi via email without having to keep a port open at the router, as was the requirement. I've used the built-in Python modules rather than download new for reasons of compatibility and future ava...

Search found 128 matches

Re: Strange file system behaviour with Python CSV file

Strange file system behaviour with Python CSV file

Re: Unable to extract indexed data using split_data_index

Unable to extract indexed data using split_data_index

Revert to Raspian bluetooth driver after Sixaxis Retropie install

Running RetroPie's UAE4All with purchased Amiga ROMs

Re: A+ problem with Edimax WiFi

A+ problem with Edimax WiFi

Re: Canon LBP2900B Printer

Re: Canon LBP2900B Printer

Re: Problem displaying signed floats

Re: Problem displaying signed floats

Re: Problem displaying signed floats

Problem displaying signed floats

Edimax speed issues

Easy LAN data xfer between Pi's

Re: RPi Printer Server without CUPS driver

RPi Printer Server without CUPS driver

tumble dryer controller

Re: Run command embedded in GMail mail

Re: SSH with UPnP

Re: SSH with UPnP

Re: RF receiver 433MHZ

SSH with UPnP

Re: Run command embedded in GMail mail