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by jmmec
Sun Feb 16, 2020 10:39 pm
Forum: Advanced users
Topic: Pi 4 USB disappearing until reboot
Replies: 7
Views: 585

Re: Pi 4 USB disappearing until reboot

FWIW, here is my post referring to this problem for a USB2 device (but I hit it on a system running Arch Linux ARM):

viewtopic.php?f=29&t=260879&p=1597996#p1597996

I swapped out the Pi4 with a different unit and haven't hit it again (so far).
by jmmec
Thu Feb 13, 2020 3:51 am
Forum: Advanced users
Topic: Verizon Jetpack and web server
Replies: 2
Views: 128

Re: Verizon Jetpack and web server

I do something like this for accessing a remote location that has Verizon service, but no longer with a Jetpack since one winter its lithium-ion battery dangerously swelled since it was plugged in 24/7. Years ago the Jetpack was replaced with a Sierra Wireless MC7455 + USB2 enclosure that is powered...
by jmmec
Sun Jan 19, 2020 6:30 pm
Forum: Advanced users
Topic: VL805 firmware release 0137ad - fixes for Isochronous streams
Replies: 65
Views: 7555

Re: VL805 firmware release 0137ad - fixes for Isochronous streams

This may be a long-shot, but since this post is about the USB firmware, it seems useful to bring up a problem reported by someone else on this forum back in Nov 2019 -- they reported a dmesg log where the USB host failed with "xHCI host not responding to stop endpoint command" : https://www.raspberr...
by jmmec
Fri Aug 23, 2019 1:14 pm
Forum: General discussion
Topic: unplug anytime ?
Replies: 21
Views: 1225

Re: unplug anytime ?

Anyone have any practical experience with the SanDisk Industrial SD cards with "power protection"? In addition, the new SanDisk Automotive and Industrial SD cards support Power Protection capability, which prevents data from being corrupted during a write when the power supply is unstable or unexpec...
by jmmec
Sun Aug 18, 2019 1:32 pm
Forum: General discussion
Topic: Configuring WWan LTE modem (SIM7000a)
Replies: 2
Views: 968

Re: Configuring WWan LTE modem (SIM7000a)

As to your original post, shouldn't the APN for AT&T be "broadband"? That's what I've used in the past on Sierra Wireless devices (MC7455, EM6511, EM7565). Your device wasn't able to register minimally due to a wrong APN. As to your followup post: no experience with the devices you're using, but the...
by jmmec
Sun Aug 11, 2019 5:30 pm
Forum: Arch
Topic: Arch Linux ARM on Raspberry Pi 4
Replies: 36
Views: 27527

Re: Arch Linux ARM on Raspberry Pi 4

FWIW, 32-bit ArchArm is running mostly fine on Pi4 as discussed in this overall thread, where my comments on trying it are covered in this thread on July 19: https://archlinuxarm.org/forum/viewtopic.php?f=8&t=13734&start=40#p61610 I didn't experiment with the camera module until today, and am hittin...
by jmmec
Sun Aug 11, 2019 3:39 pm
Forum: General discussion
Topic: Which SSD to buy for raspberry pi?
Replies: 60
Views: 9690

Re: Which SSD to buy for raspberry pi?

Would you happen to know if the Industrial versions would deal better with sudden power loss scenarios where it's not possible to have UPS Very probably not. Industrial SD is (supposed to be) less sensitive to own failures, basically because they have less bits per cell. Data corruption resulting f...
by jmmec
Tue Aug 06, 2019 1:16 am
Forum: General discussion
Topic: Which SSD to buy for raspberry pi?
Replies: 60
Views: 9690

Re: Which SSD to buy for raspberry pi?

By the way: I have got a new bench of industrial SD cards and have tested their performance: 8GB Sandisk Industrial: write=0,49MB/sec, read=3,18 MB/sec 8GB Sandisk EVO: write=0,30MB/sec, read=3,18 MB/sec 8GB NoName: : write=0,28MB/sec, read=3,21 MB/sec Wow, thanks for introducing me to the Industri...
by jmmec
Sun Aug 04, 2019 3:31 am
Forum: General discussion
Topic: Pi4: disable ethernet leds?
Replies: 3
Views: 525

Re: Pi4: disable ethernet leds?

Ah.... :|

Thank you
by jmmec
Sat Aug 03, 2019 9:03 pm
Forum: General discussion
Topic: Pi4: disable ethernet leds?
Replies: 3
Views: 525

Pi4: disable ethernet leds?

Hello,

Tried adding this to my /boot/config.txt to disable the Ethernet leds on a Pi4, but doesn't do the trick -- not supported on Pi4?

Code: Select all

dtparam=eth_led0=14
dtparam=eth_led1=14
by jmmec
Mon May 14, 2018 1:33 am
Forum: General discussion
Topic: Using your Pi with an SSD (Solid State Drive)
Replies: 50
Views: 82110

Re: Using your Pi with an SSD (Solid State Drive)

Ah, gotcha.... I see that the delayed boot setting is now permanent, which is OK. [email protected]_staging:~ $ vcgencmd otp_dump | grep 66 66:01009daa My post is partially incorrect about the Eluteng: since I set "program_usb_boot_timeout=1" while messing around with the Sabrent, then my subsequent brief tests...
by jmmec
Sun May 13, 2018 9:38 pm
Forum: General discussion
Topic: Using your Pi with an SSD (Solid State Drive)
Replies: 50
Views: 82110

Re: Using your Pi with an SSD (Solid State Drive)

Hi, I mentioned in my previous reply that I'd try booting a Pi3B (not a Pi3B+) off SSD, so I finally got a chance and here is a brief follow-up: I already had a Pi3B powered by a Cana Kit 5V / 2.5A power supply (Model #DCAR-052A5) which runs my favorite Arch Linux ARM distribution, so I only needed ...
by jmmec
Tue May 01, 2018 12:05 am
Forum: General discussion
Topic: Using your Pi with an SSD (Solid State Drive)
Replies: 50
Views: 82110

Re: Using your Pi with an SSD (Solid State Drive)

Thanks very much for the responses! I'll give this a shot in the next few weeks....
by jmmec
Sat Apr 28, 2018 8:18 pm
Forum: General discussion
Topic: Using your Pi with an SSD (Solid State Drive)
Replies: 50
Views: 82110

Re: Using your Pi with an SSD (Solid State Drive)

Thank you for your very detailed & informative posts. Now that you've had your setup running for a few weeks, how reliable are you finding boot / reboot ? I'm interested in booting a Pi3 from SSD to (hopefully) have better reliability than the original SD card boot: the Pi is located in a remote loc...
by jmmec
Sat Jul 29, 2017 11:33 pm
Forum: Camera board
Topic: Raspberry Pi Camera on ArchLinux ARMv8
Replies: 1
Views: 801

Re: Raspberry Pi Camera on ArchLinux ARMv8

I don't have a Pi3, but FWIW, all of my Pi2 (some with v1, others with v2 cameras) are running the ArchArm distribution. Everything works fine. If you're having problems with the camera on the 64-bit installation, you probably know already that you can follow the instructions for "ARMv7 Installation...
by jmmec
Sat Mar 18, 2017 4:26 pm
Forum: Camera board
Topic: raspivid: mode 1 vs mode 2/3 (v2 camera)
Replies: 4
Views: 4680

Re: raspivid: mode 1 vs mode 2/3 (v2 camera)

Unfortunately that means that I can't tell whether any lack of sharpness is due to the image processing or the resize in Shotcut. :( Sure, I had to re-record, but here is the straight h264 output from raspivid for mode 1 and mode 2; I'm still playing with the focus on the v2 camera: [email protected]:/media/n...
by jmmec
Thu Mar 16, 2017 11:09 pm
Forum: Camera board
Topic: raspivid: mode 1 vs mode 2/3 (v2 camera)
Replies: 4
Views: 4680

Re: raspivid: mode 1 vs mode 2/3 (v2 camera)

Thanks very much! I should have been clearer about how I captured the mode 1 and mode 2 videos: 1. I didn't specify the height / width resolution in my usage of raspivid. I re-ran the raspivid commands (from my original post) to get the "-v" output, and it says that it is capturing both videos (mode...
by jmmec
Thu Mar 16, 2017 2:32 am
Forum: Camera board
Topic: raspivid: mode 1 vs mode 2/3 (v2 camera)
Replies: 4
Views: 4680

raspivid: mode 1 vs mode 2/3 (v2 camera)

Hello, I have several Pi2 devices, each with a v2 camera, located at a remote cabin to capture wildlife, especially the kind that walks on two legs and vandalizes and steals property. I'm terribly stumped about the field of view differences using raspivid. Note: The video captures below were at 1920...
by jmmec
Tue Feb 28, 2017 12:41 am
Forum: Camera board
Topic: Alternatives or replacements for camera flex cable?
Replies: 149
Views: 147135

Re: Alternatives or replacements for camera flex cable?

... so I was quite relieved when I found those focusable lenses. Better quality optics too. I found one external lens that is both focusable and zoomable. You can swap it in directly for the screw-in lenses that come with the focusable units. http://www.ebay.com/itm/2-8-12mm-M12-Manual-Zoom-Manual-...
by jmmec
Sun Feb 26, 2017 4:49 pm
Forum: Camera board
Topic: Pure Python camera interface
Replies: 462
Views: 177254

Re: Pure Python camera interface

Picamera 1.13 is now released! ... and the Camera Hardware chapter almost doubles in size with a detailed description of the low level operation of the camera module. I'd strongly encourage anyone who's read these chapters before to take a look at the new ones. Thank you so much! Really appreciate ...
by jmmec
Sun Feb 14, 2016 3:21 pm
Forum: Advanced users
Topic: SSH Troubleshooting [SOLVED]
Replies: 10
Views: 1804

Re: SSH Troubleshooting

The change you made to move sshd to a different port is fine, and should work since you confirmed that sshd is listening on port 1024, but I too was wondering why you thought it necessary. Yes, I forgot to mention that I am able to ssh from the new R-Pi to itself using port 1024. I can also ssh from...
by jmmec
Sun Feb 14, 2016 2:08 am
Forum: Advanced users
Topic: SSH Troubleshooting [SOLVED]
Replies: 10
Views: 1804

Re: SSH Troubleshooting

Here are two things you can try: 1. You are probably doing this already, but just to be sure, in your case you'll need to explicitly specify port 1024 whenever using ssh, sftp, etc... If you are using Putty to connect, then of course specify 1024 in the "Port" box. $ ssh -p 1024 [email protected] 2. When you l...
by jmmec
Fri Feb 12, 2016 3:51 am
Forum: Troubleshooting
Topic: Raspberry pi2 + DS18B20 wateoof One wire temperature sensor
Replies: 1
Views: 554

Re: Raspberry pi2 + DS18B20 wateoof One wire temperature sen

It's not clear how you're determining that the Pi is hung, so I'm wondering if it may be because your Putty ssh session does not have keep-alives configured, so the connection is dying? Try configuring a keep-alive in Putty? The site below is the first I came across with a picture showing what to ch...
by jmmec
Sun Jan 31, 2016 6:24 pm
Forum: Camera board
Topic: The camera on the next Camera Module looks IMX219
Replies: 8
Views: 3026

Re: The camera on the next Camera Module looks IMX219

I have 5 camera's that were all purchased in the past few months, and I would replace them in an instant if a better quality camera /sensor is made available (say higher resolution, reduced noise, better lens - wider angle but not fisheye, ...).

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