as2333priceless https://lkml.org/lkml/2014/4/2/420
ballI've just noticed that at least one of my Raspberry Pi boards has the 26-pin header.
ballLooking at pinouts, looks like that's mostly extra GPIO pins but also an I2C ID PROM.
ball...is that to identify what HAT I'm wearing?
ali1234ball: yes, but hardly any hats use it
ballali1234: Thanks
ali1234it is also the i2c bus which controls the camera
ali1234it is normally under vc control, but you can let the arm access it, but that breaks the camera etc
ballI should buy a Pi NoIR 2 at some point.
ali1234the v2 camera isn't that different from v1
ali1234in some situations it is worse
ballI don't have the v1.
Populushiya, i've got a raspberry pi 3 model b and am going to purchase a battery with a powerboost charger but I am not entirely certain if the voltage/amp is right. could someone look at the two items i intend to buy and tell me if it'll work? adafruit.com/product/2465 and /product/328
ShorTiedon't look like much to me .. :/~
ballIn my experience Adafruit are good people. Did they recommend this for use with the Raspberry Pi 3?
ShorTiehow long do you want this thing to run on battery ??
ShorTiewhat kinda of stuff is going to be hooked up ??
Populusball I have not talked to them, just been browsing for a way to make my raspberry + display completely wireless.
ShorTienot saying it will not work, just saying i do not think it will last very long
as2333oh ok so systemd is commercial garbage from one particular company. - that starts to explain things
PopulusShorTie: Well, as long as the best battery will hold for me while also retaining the ability to continously charge if need be. Only peripheral plugged in will be a wireless keyboard which I think will draw about 100mA.
PopulusGoal is to have a small portable IRC tablet. :)
ShorTiehow you gonna power the screen ??
shauno1A isn't much for a pi3, let alone pi3+display. I'd be wary of that
ShorTieACTION concures
PopulusAlright, thanks for the input. I'll continue browsing and reading!
ShorTieyou like gotta start backwards for batteries
ShorTie1. how ling do i want it to last
ShorTie2. what will i have attached
shaunoright. it's like shoes. how big are my feet, and what do I plan on doing in them. you don't just pick the first pair that look pretty, and hope you can make it work
ShorTiethose give you the size of the battery needed
ShorTiethen add in a fudge factor of your choice
red9What is the minimum resistance needed to make a Raspberry Pi GPIO go "0" or "1" ? (ie input current). Tried various searches without success. The data on this is sparse.
as2333aren't the inputs voltage sensing FETs? Input currents are tiny?
red9Input currents are very tiny. In the micro ampere range. But the do matter when external I/O needs to signal reliably.
red9adding cable lengths, capacitance, timing limits, energy efficiency etc.. well then it matters.
red9btw, is there any power efficient sleep mode in the works for the raspberry pi? 100 mA at 5 V is not power efficient.
shaunounlikely (although entirely crystal-ball territory)
ballACTION crystal
ballred9: Have you considered having something smaller and lighter power up the Pi when you need some maths done, or communication with the outside world?
red9Had some ideas on battery powering, sensors and radio comms. Sleep sleep sleep sleep wake-send! sleep..
ballACTION nods
red9ball, have considered it. But it complicates matters. one-stop-shop is nice.
ballWhat sort of radio comms, out of interest?
shaunothe SoC family they're using is intended for set-top-boxes (hence being essentially structured as a GPU with a supervisory CPU). <100mA simply isn't a high priority for such applications
shaunoso I say unlikely in that it's possible, but it's probably not very high up the list
red9ball, temperature and other weather related measurements.
red9I figure if they had it in the pipeline. Someone here would have read/heard it.
shaunoI dunno. in the past rumours have only really sprang up in the weeks before a release
red9Going straight for spinning a properly wired ARM32 seems more efficient than bothering fixing the RPi. Unless it can be modded. ARM chips use to be efficient in general.
ballred9: ...or something lighter, if you can make it do what you're looking for.
red9The advantage with the RPi is that it's powerfull enough for a full Unix environment. Which makes logging in to various WLAN's easy. Doing the same in realmode MCU means usually implementing all the protocolls from scratch.
red9w8.. isn't it the USB thingies that suck current in sleepmode?
ballred9: Amongst other things, sure.
red9So disconnecting those = sleep mode works?
ballred9: You're making at least one leap there I think.
ballACTION looks some things up
red9(I suspect the main CPU/GPU chip to be alright)
shaunoa little off-topic, but have you looked to see if the esp family of micros fit?
red9esp8266 etc?
shaunoyeah
red9MCU – STMicro STM8S003F3P6 8-bit MCU @ 16 MHz with 1KB RAM, 8KB flash, and 128 bytes EEPROM - tight?
ballThat would probably qualify as "something lighter"
red9"802.11 b/g/n WiFi" - that is nice. But then you usually need to add lot's to login to ISP networks.
red9(https://www.watterott.com/de/AI-Thinker-ESP8266-ESP-14-WiFi/WLAN-Modul-STM8S-MCU)
shaunojust a thought. they have a reasonable community around them, and get you wifi on a much tighter power budget
red9"Standby mode 70 mA; 0.5 μA shutdown @3.3V" - That surely fit the battery bill. And to make sure it really lasts. Some chinese solar cell can be added.
red9The situation is like.. there is a public wlan but it requires a login, so any device has to be able to login, upload data and shutdown.
red9radius + 802.1x for authentication
shaunowell, I have to admit I've no idea how suitable they are for that, I've only used them in my own home. just bouncing ideas
red9if the authentication/login can be suspended and not needing to be redone at every wakeup would be even better.
red9home - easy ; public wlan - ouch ;)
shaunoon mine, wake up is just like a fresh boot
red9another idea would be a mosfet that has a capacitor attached the keeps it switched off. And when the capacitor has leaked enough the power comes back.
shaunothe only difference I've seen between the microamp sleep and just being powered off, is that there's still a timer running to trigger the wakeup later
red9Something to test: GPIO -> diode -> capacitor -> ground ; said capacitor drives a MOSFET gate that let current flow into the computer. The capacitor has a resistor to +V.
red9So when the RPi or other MCU pulls the GPIO low the capacitor discharges and slowly becomes full charged at which time the computer comes on. A schmitt trigger may be needed.
red9The question IS if the computer (RPi) will have enough time to keep the GPIO low long enough to discharge it into a meaningful sleep time.
Jonno_FTWis it possible to pair a device using hcitool? or do i have to use bluetoothctl?
red9Quite fantastic what these ARM32 / MIPS32 chips can do and the price point. Comparing it all with a C64 ;)
red9https://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-zero-power
red9Says Raspberry Pi Zero goes to 80 mA at idle. That is probably the lowest one will get without the special tricks department.
Tekknobard_wdo you have to load Raspbian to upload the firmware on an RPi3, or is there a way to do it via Windows 10 IoT?
HrdwrBoBwell, 'load' is a strong word
HrdwrBoByou could just put it on a different card
Tekknobard_wI have a multi-boot card
Tekknobard_wbut the question remains -- is there a way to upgrade the firmware from Windows 10 IoT or is that something I need to do from Raspbian?
jmcgnhTekknobard_w: the "firmware" for Raspberry Pi is in a partition on the microSD card - the "firmware firmware" of the Raspberry Pi uses the GPU to load the firmware into memory and start the boot process.
jmcgnhTekknobard_w: I don't know if Windows 10 Iot has a program available that does wht rpi-update does
as2333the booting code that the VC frist runs is stored in actual ROM, or is it flash memory?
jmcgnhTekknobard_w: for a bit more information, I think this page may help: https://raspberrypi.stackexchange.com/questions/4355/do-i-still-need-rpi-update-if-i-am-using-the-latest-version-of-raspbian
jmcgnhTekknobard_w: but some of the contributors on that page are confused. Caleb's answer seems to be the most apt
Tekknobard_wjmcgnh: reading now, but that may mean that W10IoT provides its own firmware that "updates" with the Windows build
jmcgnhTekknobard_w: possibly, I couldn't find any information about it.
Tekknobard_wor that I occasionally run raspbian to run the rpi-update
Tekknobard_wwill probably do the latter, it's not like I won't have multiple Pis to do it on and only one with W10IoT at this point
jmcgnhTekknobard_w: that's an approach that we know will work
Tekknobard_wwell, it's all pretty new to me and I'm having fun diving in
Tekknobard_wGot my ham license 2 years ago so I'd have an excuse to get into electronics, and now I have some projects that drew me into Arduino and RPi, so I'm having a lot of fun
jmcgnhas2333: Not sure what you mean by VC. There is ROM firmware on the PI that loads "firmware" from a FAT partition on the SD card using the GPU, then transfers control to the ARM CPU
jmcgnhTekknobard_w: I'll confess to being quite new at it myself, but one of the first things I did was investigate the boot process
as2333jmcgnh, I mean the videocore processor/gpu. So is that ROM firmware actually stored in ROM, or is it some sort of EEPROM?
jmcgnhas2333: My impression was that is was "baked in" to the SOC, not subject to updates. But I don't know that definitively.
as2333Oh OK, thanks. My not too educated guess would be that it's eeprom. But it's just a guess
jmcgnhas2333: if it's not too impolite to point to something that comes up in Google: http://wiki.beyondlogic.org/index.php?title=Understanding_RaspberryPi_Boot_Process
as2333haha no problem
jmcgnhas2333: I think this article may be what I read a year or so ago and gave me the impression the first stages of the boot program are "baked in"
as2333I've seen that article but didn't read it in detail. Let me see....
Tekknobard_wjmcgnh: at least functionally baked in, for all intents and purposes
as2333jmcgnh, so it says first stage bootloader is in rom and maybe I should take that at face value.
mlelstvit's something that you cannot change. There are few one-time-programmable bits that change behaviour of the code.
as2333so it's not ROM but technically PROM?
mlelstvat least a few bits are PROM.
mlelstvhttps://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/
mlelstvmy guess is that it's all PROM, but most of it can only be programmed in factory.
mlelstvbut that's not really relevant, as you cannot erase it again.
as2333yes, that makes sense.
as2333and the first stage bootloader can boot over ethernet?
mlelstvapparently.
jmcgnhmlelstv: thanks for that pointer. I just never dug deep enough in the documentation tree.
mlelstvit's something new for rpi3 (i.e. the bcm2837).
as2333so the first stage botloader is not to be trusted =)
mlelstvyou fist have to "program" the boot flags to enable the modes.
mlelstvI also find boot-via-SPI interesting.
as2333yes but the room has code to access the ethernet controller (hardly surprising I guess) and who knows what else.
as2333rom
mlelstvthat's documented... :)
mlelstvSD1, SD2, NAND, SPI, USB mass storage, USB network, USB device mode.
mlelstvhmm. The device mode only works with a Pi Zero, but is there a Pi Zero with 2837 ?
mlelstvthere is a compute module with 2837 that could do it.
as2333maybe I should get a novena but it's a bit more expensive than the pi...
mlelstvwhat for?
as2333general purpose =P
dan2wikAre there any other differences between the Pi0 and the Pi0w other than wifi?
dan2wikI somehow destroyed the wifi chipset and would like to make the Pi identify as a Pi0 instead of a 0w
BurtyBserial behaves differently possibly other things too
BurtyBI doub't you'd be able to do that truely as it's probably in the chips OTP
dan2wikI wonder if I could use the SDIO and serial interfaces
dan2wikthe esp8266 can do sdio with a kernel module.
BurtyBthere's a pHAT with the same chip on iirc
dan2wikYeah, but that ties up GPIO
BurtyBdepends what you mean by ties up gpio .. but using sdio / serial is going to use some
dan2wikYeah, but connecting to the SDIO and serial under the dead wifi chip doesn't use up the GPIO on the header
BurtyBin that case good luck ...
binaryhermitthat sounds... somewhat difficult to do
BurtyByeah I just looking up the pitch.. and it's 0.4mm so maybe not as bad as it could be heh
dan2wikI found the reason it stopped working
dan2wikThere is a big chip under the corner of the wifi chip
dan2wikI'm not certain why but it seems the silicon is de-laminating
dan2wikBluetooth still works despite the chip turning back to sand.
shiftplusonedan2wik: photo?
dan2wikshiftplusone, https://i.imgur.com/f5gExps.jpg
shiftplusonedid it arrive like that? did it get knocked by something? or was it just laying there and that happened by itself?
dan2wikI'm not certain
dan2wikThe corner was loose, but this has been with me for a few months now
shiftplusonefair enough
Jack64hi, I'm facing an issue with the rt2800usb driver for my wifi card that only happens on armv7 (Pi version) kali (x86/x64 works fine). For some reason, I can't get it to see 802.11 ACKs. is this the place to ask about this?
Habbiesame usb stick, same kali, just different architecture?
Jack64yes
Jack64exactly the same everything
Jack64except kali is armv7
Jack64(and I assume rt2800usb is also armv7)
Habbieso if there is a difference, i suppose it would be in the respective kernels
Habbieoh, or the firmware files
Habbiecan you compare those? the firmware files for the usb dongle
Jack64if you can tell me where they are :)
Habbiethey are in /lib/firmware on debian&friends, i sall i know
Jack64Habbie: I'll check when I get home, in a couple of hours
Habbiealright
Jack64I left the Pi off when I left for work this morning
Jack64but I'm definitely wanting to fix this
Jack64oh btw, this is only in monitor mode that I can't see it, I'm not sure if in managed mode it sees the ACKs it should
fred1807Anyone has got any idea how to update vgfont/font.c to accept unicode characters?
tdnAnyone know how to mount a RaspberryPi 3 on a wall with the official case?
ShorTieACTION Thinkz, Lag bolts
pksatotdn: 3M VHB?
shaunoduct tape
fred1807is ther any tool I can use to render text / overlay a omxplayer video? (not using X)
Jack64fred1807: I think ffmpeg can do that, better confirm tho
fred1807actually not attached to the video playback
fred1807to render a text on the screen
fred1807frambuffer
Jack64ah
Jack64haven't looked into that then
Jack64only for videos
Jack64GL tho :) I'm off to lunch
tdnThose that use rpi for kodi or other media center use. Do you ever power off your PI? Or do you just turn off TV and leave the PI on?
Xavknoleave it on
tdnProblem is that there is no power switch button so it is difficult to turn it back on if I shut it down
tdnXavkno, ok
SirLagzanyone run Squid on the Pi 2? Notice any hits to bandwidth when running squid on a Pi ?
doublehpstupid thought: can a CSI video connector be used to input video stram from non-camera devices ? My need of the week is to build an IP-KVM. The cheapest ready to use KVM starts at 350. It's possible to acquire the video signal for 50 by using a bunch of video adapters (VGA to DVI, then DVI to AV, then AV-USB acquisition board; yes, the sum of 3 devices is cheaper than all 3 in the same box). But, since Raspberry Pi already has a CSI connec
BurtyBdoublehp, https://www.raspberrypi.org/forums/viewtopic.php?t=120702 is about all I can remember seeing atm
doublehpBurtyB: it's more expensive than buying DVI-AV-USB adapters !!!
dan2wikIs it possible to do DSI => CSI?
dan2wikI know the connectors are wired differently, but it sounds possible in my head
doublehpdan2wik: I don't, know DSI. The CSI rPi adapters are here on sale https://auvidea.com/product-category/csi2bridge/ and see the products pages for specs
doublehpdan2wik: yes, the above link mentions SDI to CSI board for 300 (SDI, not DSI)
dan2wikI was just thinking, if you could do DSI to CSI, you could attach a Pi0w to a Pi3 and have remote physical console
doublehpDSI != SDI ?
Jack64Habbie: ugh, forgot to check whether SSH was up. I guess I'm only checking that firmware thing after work. I'll keep you posted
fred1807is there a boardless browser I can use to create a tiny retangle of html content on screen?
dan2wikYou could put any browser into fullscreen
fred1807not full screen
fred1807a small screen
fred1807like a widget
HabbieJack64, sure, good luck
Jack64Habbie: this will be a pain to test if I have to keep pulling the card from the Pi to the laptop for debugging :-X
Habbiewhy would that be needed?
Jack64because I have to see which firmware is loaded in each?
Jack64have you heard of anyone having problems like this in parsing wifi packets?
Habbiei have not heard of this, but that does not say much
Jack64right
Jack64I guess it's because it's a specific 802.11 frame
Jack64I'm using scapy and manipulating frames manually that's why I noticed it
Jack64I can send you a few lines of python code that send the frame and what code I use on to sniff it on the other end (which works for x86/x64 anyway) if you want to try it yourself
HabbieJack64, not that interested right now, thanks!
r3So I've got one of these: [ https://www.sparkfun.com/products/12781 ] powered by one of these: [ https://www.sparkfun.com/products/10469 ] and I have two questions: Any thoughts about a portable/wearable 12VDC source and how touchy is that [EL Inverter - 12v] ... would it accept 18V? 9V? I just don't have a 12V source handy that's wearable.
r3wrong channel, I am sorry
gordonDrogona somewhat shocking experience if it wasn't properly insulated...
mlelstvbetter shocking than sparkling
Roxxor91Hey! I am running a headless Raspberry Pi 3 and would like to connect to wifi with network-manager (on raspbian). But somehow how I cant connect to Wifi. "nmcli dev" gives me: "wlan0 wifi unavailable" SOmebody knows how to fix this?
plumhey Roxxor91
plumyou need to edit /etc/wpa_supplicant/wpa_supplicant.conf
plumi think
plumjust ssh'd into a pi wirelessly to check lol
plumi run most of mine headless
Roxxor91plum: Do you use network-manager, or do you configure via wpa_supplicant?
plumoh wait no i think i'm using the wpa_supplicant way, my bad :(
plumi don't believe i've used network-manager before
plumso i'd be speaking from ignorance on that haha
Roxxor91network-amanger is abit nicer, as its one tool to configure eth and wifi. But if it makes trouble to set it up I should maybe just use wpa_supplicant. Do you ahve a link to a guide how to configure itß
plumcheck out near the bottom of this page
plumhttps://www.raspberrypi.org/forums/viewtopic.php?t=161202
plumthat looks like my setup
plumthis might be more detailed though
plumhttps://caffinc.github.io/2016/12/raspberry-pi-3-headless
plumthis is assuming you're on Jessie though, i haven't tried Stretch myself
Roxxor91plum: Thanks!
plumno problem, hope it helps!
Roxxor91plum: I'm connected via WIFI. Thanks!
DammitJimwhat should I put in my script to exit properly and cleanup GPIOs when I use Ctrl + C?
TechSmurfDammitJim: Do you know what *would* clean up the GPIO, and are just looking for how to deal with the ^C?
DammitJimjust how to code something like that properly
akkPython?
DammitJimI know I can use in Python GPIO.cleanup()
DammitJimso, maybe my code structure is just bad
TechSmurfhmm.
TechSmurfI don't know how python handles ^C.
DammitJimmaybe this is NOT a raspberry pi problem, but rather a python problem
DammitJimI have a loop where I am reading the brightness of the environment every 5 seconds
akkDammitJim: https://github.com/akkana/pi-zero-w-book/blob/master/ch2/blink-rpigpio.py
DammitJimif the brightness is less than a threshold number, I turn on an LED
DammitJimI want to make sure that when I Ctrl + C, that the GPIOs get cleaned up
TechSmurfACTION nods
DammitJimI do have a try block, but it's more for writing to a database (mysql)
TechSmurfMakes sense... I do the same with serial io.. but my users have no kb, so I never had to catch ^C specifically.
DammitJimwhich I would also like to close the database when the Ctrl + C is pressed
DammitJimthanks akk
DammitJimweird that I did my code in reverse order!!!
DammitJimI did the while first, then the try inside it
DammitJimblah
DammitJimI need to learn a better order of thinking
akkIf you put the try inside the while you'll have to break out of the while, or sys.exit, if you get the exception.
DammitJimyeah, such a simple thing!!
DammitJimI just made it sooo much more complicated by starting the code like that
TechSmurfAnd this is why I'm here... I don't have a question, but I just learned two useful things :)
DammitJimwow
DammitJimvery simple, thanks akk! I was able to put everything in a KeyboardInterrupt exception!
DammitJimactually, I should put all that in a finally!
akkYeah, maybe I should use finally too, but it never seems to matter much and I haven't gotten into the habit.
pksatoDammitJim: https://docs.python.org/2/library/signal.html
akksignal works too, but KeyboardInterrupt is easier.
DammitJimI'll need to learn about signal
DammitJimbut the underlying problem has been taken care of, which was to code a graceful stopping of the app... even if it's not a keyboard interrupt
TechSmurfACTION crosses his fingers and wanders off to power up his latest pi
nafACTION slaps DrJ around a bit with a large trout
DammitJim?
pksatowith some examples https://stackoverflow.com/questions/1112343/how-do-i-capture-sigint-in-python
TechSmurfWoot! It lives!
DarkDrgn3kany one know if rt2800usb divers still have issues?
DarkDrgn3krunning an iperf test seems to cut out for brief momdnets randomly
gobostoneanyone using the adafruit stepper hat?
gobostoneI have a 12v stepper attached but it will only rotate using single steps. it glitches out when trying double, interleaved, or micro steps
gobostoneit just erratically bounces around
stivACTION guesses: a timing issue OR your code is not doing what you think it is
gordonDrogonor the PSU. moar amps ...
stivgood point! moar amps is always good
gordonDrogonespecially for steppers & microstepping.
{HD}Whats the easiest way to power 10 raspberrypi 3s?
DarkDrgn3kwitht 10 power supplies?
MrBusinessI guess you'd probably want to look for a powered UAB 3.0 hub, trying your best to maximize the wattage, and aiming for a good 2.5A minimu per port.
{HD}10 individual supplies! I was looking for something cheaper and lower profile.
MrBusinessideally, having a hardware switch on each port will also help
{HD}MrBusiness: that sounds ok
stivget $1 phone chargers from the dollar store
stivthen see gordonDrogon's advice above
gobostoneI've got a 1 amp power supply for the hat
MrBusinessif you want to get more elaborate, find yourself 10 Power over Ethernet GPIO expansion boards and hook those up to a 10 port gigabit hub with PoE enabled for all 10 ports, but I guarantee you that'll cost more
MrBusinessah, what hat is it wearing? or do you mean that the hat is literally a 1amp PSU?
gobostoneI'm a different person
gobostoneand I'm still talking about getting my stepper motor to do microsteps
MrBusinessah
gobostone:)
MrBusinessinteresting subject
{HD}Ill start with usb hubs
{HD}To amazon!
MrBusinessI need to see what other people have done about creating completely wireless- self-sustaining camera node Pis for a DIY security system.
MrBusinessPlanning to hide from i Zero Ws that have been waterproofed as much as possinle in a big strawberry planter with a plastic plant in it, which probably means I'llneed an anti-static bag as well as a hardy, ideally waterproof outer bag, and perhaps a straw for heat release
MrBusinesshonestly, the heat management aspect of this could prove more problematic than power delivery and introspection.
{HD}MrBusiness: cool project! I would be interested in updates. I have several 0ws around the house in the “official case” unhidden running motioneyeos...
MrBusinessyeah. I mean, if I didn't live in an apartment I could just drill through the walls.
{HD}I was thinking of doing something different but hadent decided what yet
MrBusinessprobably could do that anyway
MrBusinessgiven the state of the place and the relative non-chalance of my landlords
DammitJimhas anyone gotten an lcd display for the pi that covers all the pins?
DammitJimI'd like to know what options one has to be able to use the pins while connecting the display
{HD}MrBusiness: are you going battery or wired? I was trying to find some good cheap longlasting barltteries
MrBusinessnot sure what even happened to most of my LCD-enabled Pis, but they were all B+es anyway
MrBusinessbatteries
MrBusinessI've stumbled across a few kits on Amazon
MrBusinesssome using those yellow-bagged LiOn batteries
MrBusinessothers using rechargable 18000-series batteries ala eCigs
MrBusinesssome using regular AA/AAA
MrBusinessI've even found a very small UPS
{HD}I wonder how long an 18650 would last
drich93hello, does anyone know if the "old" GL stack uses DMA or PWM engine ? I have erratic output on DMA-GPIO when using GL in parallel
MrBusinessnot sure, but I suspect that if you get ones with good maH rating, as I don't believe that they are all created equally within the 18000 series, then putting them in series oculd afforrd a great deal of maH
MrBusinessbut yeah, the biggest problem I see with running a wire to my flower pot is that then I have a visible wire (or set of wires) leading to a planter, which is stranger than hell.
MrBusinessoh wait, I also saw a video about water-cooling Pis. Apparently some company makes parts for that, and it would probably nip my heat issues straight in the bud.
MrBusinessLord knows though, this project could take me a very, very long time. I am not as quick as I used to be. Frankly, I need to find that original B+ I had sitting around and do something with it.
MrBusinesshow many monitors has anyone ever gotten a single Pi to run? Has anyone made a cluster with a shared X.org configuration such that each Pi can independently drive a set of monitors interconnected/distributed over the cluster? I'm sure someone on YouTube has attempted it at least, so I reckon I shall look there
DammitJimwhat touchscreen lcd is recommended that doesn't use hdmi nor cover the GPIO header?
DarkDrgn3kDammitJim: well for one a touch screen needs more of an interface then just the ribbon..'
DarkDrgn3kDammitJim: so proabbly going to be hard to find
BurtyBDammitJim, dfrobot usb touch screen?
DarkDrgn3kyeh thats proably going to be the only one..
DarkDrgn3kto fit youre req
nafACTION slaps DrJ around a bit with a large trout
DammitJimthanks guys
DammitJimdfrobot?
DammitJimhow about just a regular lcd screen, then?
DammitJimno touchscreen
DammitJimall of the displays I'm looking at seem to use the header pins
LartzaDammitJim, Touch screens?
DammitJimI'm giving up touchscreen
DammitJimjust lcd displays
LartzaComposite?
DammitJimover the ribbon connection
LartzaOh yeah, hmm
LartzaWell, DSI, so not ribbon but flat flex
LartzaRight? :P
DammitJimyeah flex
DammitJimsorry
ShorTiehow big do you want the screen to be ??
DammitJimdon't care about the size, but the resolution... minimum of 320 pixels in resolution
ShorTiethose rear view monitors are preaty good
ShorTieand be run from the pi
LartzaSo I mean, what's wrong with the official 7" touch screen for instance?
ShorTielike this, https://www.ebay.com/itm/4-3-TFT-LCD-Car-Monitor-Reverse-Rearview-Mirror-Color-Camera-DVD-VCR-T7Q8/132159306152?epid=751528363&hash=item1ec54ef9a8:g:gwQAAOSwGy5Y8PKW
DammitJimdsi
DammitJimugh
DammitJimbbl
kerioi think there's just the one official touch screen for that connector
SmeefWhenever I try to RDP into Raspbian from Windows, the username/password always fails the first time, then works the second time. If I intentionally use the wrong password, I still have to use the right password, let it fail, then do it a second time to get in.
SmeefAnyone know why?
r3that's really odd, Smeef
r3have you tried waiting like 20 seconds after connecting to see if it will take it the first time?
r3and it's just a straight username/password, nothing else like LDAP or AD or anything else?
Smeefr3: Nope, it's been happening consistently for weeks, I only just got annoyed by it, lol
SmeefI've given it more than sufficient time to boot on multiple occasions
SmeefThere's also an option for the connection type, but sesman-xvnc is the only option that works
r3so it's the RDP client from Rasbian (is there a patch? new version?) and the version 10 of mstsc.exe?
r3maybe try VNC? I've used that more in the past to talk across platforms than RDP
DatzPosted in a couple other channels too. I'm seeing some strange activity from some temperature sensors (DS18b20) I have them in the same location, but one it seems is lagging the other. They are polled one minute apart, and I can't figure out why they are behaving like this: https://pasteboard.co/GRo3cfJ.png
SmeefRaspbian is running xvnc with I installed after installing Raspbian, I also update/upgrade/dist-upgrade frequently, so I'm pretty sure everything is up-to-date. Also, yes, I'm using the latest version of Windows Remote Desktop
SmeefSorry, not xvnc, I mena xrdp*
SmeefTypo
SmeefAlso, I added hard and soft power/shutdown buttons to the Tic-Tac box, but accidentally scratched the inside of the case with a file, right next to the display, gonna have to buy more Tic-Tacs and get a new clear plastic box, lol: https://i.imgur.com/rDnmLpq.jpg
r3what version of raspbian, Smeef?
Smeefr3, the latest version, the one after jessie, can't remember the codename, lol
r3stretch?
SmeefYeah
r3there a firewall or anything between the two?
r3Datz: is the time exactly the same on the two systems?
SmeefHmmm, maybe, I think I downloaded and installed some wireless AP software
Datzr3: it's the same system
r3ah
Datzcronjob is like 1min apart
Datzand every hour
Datzmy only thought is that one sensor has more "insulation" in it
Datzbut that doesn't seem like an adequate conclusion
r3Smeef: well, maybe be sure that the port (5900 IIRC?) is fully opened/allowed ... there is so much that could be going on - from a sleepy ethernet port to a wonky client - it would be interesting to see if VNC did the same
r3Datz: well, one could just be that much different than the other (but still within the 0.5C spec?)
r3insulation would make that happen, if the red like peaks there at 12:00 10/18 and then the yellow line follows just a few minutes behind - that would make sense that the yellow is more insulated
r3s/like/line/
Datzr3: yeah. Thinking it's the sensor
Datzmaybe buy a few more and figure out which ones respond the fastest
r3where are you sourcing them from? adafruit, sparkfun, ?
Datzebay
r3ah
Datzthe "high temp" ones are all pretty similar it seems
r3how much on ebay when sparkfun has 'em for $4? heh
Datzless
Datzprobably half that and free shipping
r3huh
DatzI can't remember though
r3this looks fun: https://www.adafruit.com/product/381 but overpriced
r3gee thanks for the free $0.00001 resistor
Datzlol
Datzyeah, I think I came across that awhile back too
r3but you know that the Pi have on-board temp sensors, right?
DatzI don't know about the shipping on this one.. but it's cheap https://www.newegg.com/Product/Product.aspx?Item=9SIA6705VF9760&ignorebbr=1&nm_mc=KNC-GoogleMKP-PC
Datzfree shipping to here
Datzfor $1.45
Datzadafruit makes big money off of their customers
Datzmight have to just order a few more now :)
r3[ cat /sys/devices/virtual/thermal/thermal_zone0/temp ] will get you the system temp in thousandths of degrees
Datzneat
Datzwhere is it pulling that from?
r3CPU of the PI IIRC
Datzah
DatzI can pull it from the real time clock module, also
r3ACTION nods
Datzall these sensors
Datzgot a readout of all the sensors on this iMac earlier.. must have been like 50 temps
r3well some of the paths point to the same sensor just with a different path or name for compatibility
Datzthat makes sense, some of them were the same
Datzsomeone was put this imac to the curb
Datzjust had to reflow the graphics card in the oven, and good as new
r3yow
Datzyeah, quad core i7 with hyperthreading, and a 2k 27" display
Datzplut other components are probably similar level of quality
Datzplus*
Datzthat's my score of the year I guess