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by hippy
Mon Dec 30, 2019 6:33 pm
Forum: Python
Topic: Serial port weirdness
Replies: 2
Views: 203

Re: Serial port weirdness

After a long slog I have identified the issue ... /usr/lib/python2.7/dist-packages/serial/tools/list_ports_linux.py /usr/lib/python3/dist-packages/serial/tools/list_ports_linux.py return [info for info in [SysFS(d) for d in devices] if info.subsystem != "platform"] # hide non-present internal serial...
by hippy
Mon Dec 30, 2019 4:29 pm
Forum: Troubleshooting
Topic: EE Smart Hub
Replies: 2
Views: 97

Re: EE Smart Hub

Just a thought but could it have anything to do with IPv6 versus IPv4 ?
by hippy
Sun Dec 29, 2019 7:03 pm
Forum: Troubleshooting
Topic: GUI for changing IP ethernet address ?
Replies: 3
Views: 179

Re: GUI for changing IP ethernet address ?

Never used this so don't know how well it works? I am currently setting up a Raspbian Buster Desktop installations so I can tell you ... not very well. Don't know what it did but nothing happened after "Apply". And after rebooting it just sat there trying to configure networking, until I got bored,...
by hippy
Sun Dec 29, 2019 3:36 pm
Forum: Beginners
Topic: Looking for a little assistance.
Replies: 10
Views: 366

Re: Looking for a little assistance.

As far as I can tell the "SIM 7600X 4G HAT" is not a "HAT" as per RPF specification, is just an add-on board with pass-through. From a quick look at the schematic the only connections it has to the Pi are 5V, 0V, TX (GPIO14) and RX (GPIO14), Flight Mode (GPIO4), and Key (GPIO6) - https://www.wavesha...
by hippy
Sun Dec 29, 2019 2:49 pm
Forum: Beginners
Topic: What I learned setting up my first Pi in a long time
Replies: 31
Views: 1268

Re: What I learned setting up my first Pi in a long time

It's common understanding today that coding will become as important in the near future as literacy was in the 19th and 20th centuries. Every person will need to know how to code to automate the everyday tasks that he/she is required to perform daily at work. Those who won't be able to code will no...
by hippy
Sun Dec 29, 2019 2:27 pm
Forum: Troubleshooting
Topic: Difference between 3.3V pin and normal pin
Replies: 3
Views: 197

Re: Difference between 3.3V pin and normal pin

Now I wonder what the difference between the two pins is and hope you can help me. A power pin delivers power, can supply a moderate amount of current at a specific voltage. An I/O pin delivers a signal, can only supply a minimal amount of current. Try to draw too much current out of either and dam...
by hippy
Sun Dec 29, 2019 2:16 pm
Forum: Troubleshooting
Topic: Raspberry pi 3b+ not booting
Replies: 2
Views: 68

Re: Raspberry pi 3b+ not booting

ceslavsslv wrote:
Sun Dec 29, 2019 9:44 am
I suspect that the 3.3V controller is bad. Can someone help me to fix it?
Unlikely IMO. The component which is likely to have failed, the Power Management IC, is not readily available for purchase and not easy to replace, requires specific skills and the right equipment.
by hippy
Sat Dec 28, 2019 7:17 pm
Forum: Off topic discussion
Topic: What dictates the accuracy of a gps module? [solved]
Replies: 12
Views: 1497

Re: What dictates the accuracy of a gps module?

The accuracy is dramatically bad: some 10 to 15 km... when moving everything this changes to around 1 km ... an idea where to look and change things??? is there a way to "calibrate" or something ? That's utterly atrocious. I have used cheapo GPS indoors with just a few satellites reported as being ...
by hippy
Sat Dec 28, 2019 1:28 pm
Forum: Staffroom, classroom and projects
Topic: Warranty and mean time to failure
Replies: 4
Views: 348

Re: Warranty and mean time to failure

MTBF rates are often quoted for individual components by hardware manufacturers, are used to promote their products over others, but it's rare to see MTBF rates for an assembly of parts, probably because it's such an effort to calculate them. It's also difficult to derate them to how a particular pr...
by hippy
Sat Dec 28, 2019 12:47 pm
Forum: Python
Topic: Serial port weirdness
Replies: 2
Views: 203

Serial port weirdness

I'm using a Pi 3B (non-plus) and, as I understand it; /dev/ttyS0 is the user accessible mini UART on GPIO14/15, /dev/ttyAMA0 is the full UART used for Bluetooth, respectively /dev/serial0 and /dev/serial1 - pi@Pi3B:~/tmp $ ls -l /dev/serial* lrwxrwxrwx 1 root root 5 Dec 27 02:04 /dev/serial0 -> ttyS...
by hippy
Sat Dec 28, 2019 12:19 pm
Forum: Advanced users
Topic: /dev/ttyAMA0 -> /dev/ttyS1
Replies: 18
Views: 749

Re: /dev/ttyAMA0 -> /dev/ttyS1

I need to have the device listed with dmesg | grep tty, else it will not appear in the list of options of the software i'm using. It seems to me it won't be possible to achieve that unless you recompile the kernel or the parts of the system which assign serial device names when the system boots. Th...
by hippy
Fri Dec 27, 2019 5:03 pm
Forum: General discussion
Topic: pi zero w in quantities of 10...50
Replies: 103
Views: 23115

Re: pi zero w in quantities of 10...50

Maybe the Pi Retail Store could lead the way; sell bulk quantities of Zeroes at WH prices, PMIC chips and other things we cannot currently get. It's 'in person availability' for now but would be a start, one way to measure whether there's any popularity or not. It's minimal risk and cost because th...
by hippy
Fri Dec 27, 2019 1:45 pm
Forum: General discussion
Topic: pi zero w in quantities of 10...50
Replies: 103
Views: 23115

Re: pi zero w in quantities of 10...50

Maybe the Pi Retail Store could lead the way; sell bulk quantities of Zeroes at WH prices, PMIC chips and other things we cannot currently get. It's 'in person availability' for now but would be a start, one way to measure whether there's any popularity or not. It's minimal risk and cost because the...
by hippy
Fri Dec 27, 2019 1:10 pm
Forum: General discussion
Topic: Could someone with an RPi 4 run some benchmarks for me please?
Replies: 12
Views: 491

Re: Could someone with an RPi 4 run some benchmarks for me please?

Artlav wrote:
Fri Dec 27, 2019 12:16 pm
And a curious thing about Pi 4 is that it's the first one to have a 64bit ARM CPU, instead of 32bit ones on the older models.
I thought the 2B Ver 1.2, 3B, 3A+, and 3B+ were also 64-bit. All Cortex A53 where the 4B is A72, but all ARMv8.
by hippy
Fri Dec 27, 2019 12:55 pm
Forum: Beginners
Topic: How do I add an OLED display with PoE HAT installed?
Replies: 4
Views: 202

Re: How do I add an OLED display with PoE HAT installed?

Popeye70 wrote:
Thu Dec 26, 2019 10:11 pm
1. Are the PoE HAT using any of the 40 GPIO pins
Yes, 5V and 0V, and for fan control. I don't know which pins are used; there isn't a schematic of the board I know of and don't know where the hardware documentation would be.
by hippy
Fri Dec 27, 2019 12:36 pm
Forum: General discussion
Topic: pi zero w in quantities of 10...50
Replies: 103
Views: 23115

Re: pi zero w in quantities of 10...50

sell a PiZeroC at £15-ish in whatever quantities people want ? I can't see the extra £10 is going to put off anybody buying one-offs ofr hobby use, whilst also allowing a legit way for commercial use That is already available. The RPF/RPT aren't the obstacle here. As Jamesh has noted, here and prev...
by hippy
Fri Dec 27, 2019 12:15 pm
Forum: General discussion
Topic: Could someone with an RPi 4 run some benchmarks for me please?
Replies: 12
Views: 491

Re: Could someone with an RPi 4 run some benchmarks for me please?

"....how much (USD?, gold bar? etc) is the OP willing to compensate those who will be willing to do the benchmark test...."? I would do it for free but don't currently have a Pi 4B set-up to do it with, and I would want a step-by-step how to. One of the great advantages of a Pi is one can burn a ne...
by hippy
Thu Dec 26, 2019 3:58 pm
Forum: Off topic discussion
Topic: Your best Raspberry Pi memories
Replies: 7
Views: 658

Re: Your best Raspberry Pi memories

I have a mixed bag of 'Pi memories', some good, some bad, some I cannot mention. The best are those where I got something to work or learned something new. Getting a pixel to light on a GPIO attached LCD using my own driver code was probably the most satisfying; a proper 'fist in the air' celebration.
by hippy
Thu Dec 26, 2019 3:25 pm
Forum: General discussion
Topic: Opinions needed on user interface design
Replies: 5
Views: 267

Re: Opinions needed on user interface design

It's the ambiguous nature of what "sensor on" and "sensor off" means which is the root of the problem so that could be resolved by changing the text "sensor is on/off", "turn sensor on/off", but it's likely still going to be confusing using one thing to show state with the button being an option to ...
by hippy
Thu Dec 26, 2019 3:08 pm
Forum: Troubleshooting
Topic: Pi4 solid red and green led
Replies: 39
Views: 3209

Re: Pi4 solid red and green led

Indeed I can confirm the PWM-like behavior of the GREEN LED. Is not lighting at full capacity. Do you have a multi-meter you could use to carefully measure the 3V3 with respect to 0V ? The safest way to do that is with 'DuPont' female jump wires to the GPIO header pins and measuring at the other en...
by hippy
Thu Dec 26, 2019 12:56 pm
Forum: General discussion
Topic: How many projects does it make sense to combine into one Pi?
Replies: 7
Views: 433

Re: How many projects does it make sense to combine into one Pi?

I would tend to favour 'one Pi per major function', so I would have separate PiHole, Kodi and NAS Pi's for example. That way one doesn't need to worry about any function adversely affecting another and one can pull a function from the whole without affecting the others. If something breaks or fails,...
by hippy
Thu Dec 26, 2019 12:01 pm
Forum: Off topic discussion
Topic: Suggestions for future builds & uses
Replies: 9
Views: 649

Re: Suggestions for future builds & uses

8 years since the post I replied to and well we do still get the suggestions like that. Can only guess a third post that isn't there bumped it up to active. Could be someone posted to the thread then deleted it themselves realising they had necroed it, leaving you to claim a possible record for old...
by hippy
Thu Dec 26, 2019 11:51 am
Forum: Python
Topic: Serial Monitor for Python
Replies: 2
Views: 215

Re: Serial Monitor for Python

This was pulled from some other code so not tested ... #!/bin/usr/python2 import serial import time def Monitor(comPortName, comBaudRate): comPort = serial.Serial \ ( port=comPortName, baudrate=comBaudRate, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS ) try: whi...
by hippy
Thu Dec 26, 2019 11:32 am
Forum: General discussion
Topic: Just a white screen with 3.5 Inch display
Replies: 3
Views: 196

Re: Just a white screen

If this is an LCD which attaches to the GPIO header that would likely be the expected behaviour if you have not done anything else to enable or use the LCD. I do not think this 3.5" LCD you have is the Official Foundation Display so it may be better to ask your question elsewhere in the forum, provi...
by hippy
Thu Dec 26, 2019 11:01 am
Forum: General discussion
Topic: pi zero w in quantities of 10...50
Replies: 103
Views: 23115

Re: pi zero w in quantities of 10...50

I like the socialist principle of Pi Zero availability; that everyone is entitled to one and no more. The only limitation being how many have been produced. That's been a little diluted by some resellers allowing people to buy multiple Zeroes as long as they are bought singularly and separately. But...

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