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by picandies
Sat Nov 13, 2021 2:45 pm
Forum: General discussion
Topic: Cconvert I2C Arduino to RPI
Replies: 12
Views: 424

Re: Cconvert I2C Arduino to RPI

Well, it was actually a module, that I didn't yet have at the time. But now I rcvd it back again & seems to work with the block write on the rpi
by picandies
Fri Nov 12, 2021 5:52 pm
Forum: General discussion
Topic: Cconvert I2C Arduino to RPI
Replies: 12
Views: 424

Re: Cconvert I2C Arduino to RPI

If the goal is to write the bytes [0x53, 0x48, 0x20] to register 0x47 then this would be correct. I don't know if 0x47 is a register at all, just know is sequence of bytes goes to the addressed item. But what about the Arduino endTransmission? Does that send something special the rpi sending will l...
by picandies
Fri Nov 12, 2021 8:25 am
Forum: General discussion
Topic: Cconvert I2C Arduino to RPI
Replies: 12
Views: 424

Re: Cconvert I2C Arduino to RPI

so Arduino Wire.beginTransmission(0x35); //address to use Wire.write(0x47); Wire.write(0x53); Wire.write(0x4B); Wire.write(0x20); Wire.endTransmission(); will be the same on the pi using from smbus import SMBus bus = SMBus(1) bus.write_i2c_block_data(0x35, 0x47, [0x53, 0x48, 0x20]) Is that correct?
by picandies
Fri Nov 12, 2021 4:12 am
Forum: General discussion
Topic: Cconvert I2C Arduino to RPI
Replies: 12
Views: 424

Re: Cconvert I2C Arduino to RPI

So the exact equiv for Wire.endTransmission(); is the write_i2c_block_data(addr,cmd,vals) command?
Hopefully that emulates the Arduino sequence.
by picandies
Thu Nov 11, 2021 9:00 pm
Forum: General discussion
Topic: Cconvert I2C Arduino to RPI
Replies: 12
Views: 424

Re: Cconvert I2C Arduino to RPI

I was using a bunch of rpi bus.write_byte(addr, 0x53) , but note each is sending the address each time.
rpi 4 Python 3
by picandies
Thu Nov 11, 2021 7:05 pm
Forum: General discussion
Topic: Cconvert I2C Arduino to RPI
Replies: 12
Views: 424

Cconvert I2C Arduino to RPI

I am sending the i2c codes using arduino, but no need to use rpi & smbus Wire.beginTransmission(0x35); //address to use Wire.write(0x47); Wire.write(0x53); Wire.write(0x4B); Wire.write(0x20); Wire.endTransmission(); What is the equiv in rpi land? I don't think I want to send the address more tha...
by picandies
Mon Nov 08, 2021 1:26 pm
Forum: General discussion
Topic: LCD madness
Replies: 3
Views: 228

Re: LCD madness

LCD Piracy ?? Never heard of that.
Is there a typical setting for these 7 inch display (to fill the display screen)
by picandies
Mon Nov 08, 2021 10:18 am
Forum: General discussion
Topic: LCD madness
Replies: 3
Views: 228

LCD madness

I have a 7 inch touch screen and plugged it into HDMI 1 on my rpi 4 However instead of a 7 inch display, there is a border & I only get 6 inches (diagonal) of display) Losing a full inch of display is not good! The display is supposed to be 1024x600 & that is what the rpi screen config menu ...
by picandies
Sun Jul 25, 2021 6:26 am
Forum: General discussion
Topic: HDMI dongle to Laptop ---keyboard???
Replies: 4
Views: 284

Re: HDMI dongle to Laptop ---keyboard???

Thanks!! those are some good ideas!
by picandies
Sun Jul 25, 2021 5:56 am
Forum: General discussion
Topic: HDMI dongle to Laptop ---keyboard???
Replies: 4
Views: 284

HDMI dongle to Laptop ---keyboard???

Hi--I am working in a rather remote location,( outside), no wifi at all & headless. Rather than lug around an LCD for my RPI 4, I got an HDMI to USB converter dongle & using the PC (win10) webcam viewer to turn my laptop screen into the rpi "deskop"...seems to work OK & surpris...
by picandies
Tue May 25, 2021 3:42 pm
Forum: General discussion
Topic: oddball csv corruption
Replies: 6
Views: 375

Re: oddball csv corruption

To be clear this code snip is working, the data is in the file--you can verify it using libre. This code portion has already been run & is not being used (the rest of the program is running), when the power is flicked off. Why would only the 2nd line of the file be lost? Again, if you use libre ...
by picandies
Tue May 25, 2021 10:53 am
Forum: General discussion
Topic: oddball csv corruption
Replies: 6
Views: 375

oddball csv corruption

Using an rpi4, and writing some small csv files. Along the lines of: with open("myfilename.csv", "w") as mylog: mylog.write("NAME, ADDRESS, CITY, STATE\n") with open("myfilename.csv", "a") as mylog: mylog.write("apple", "dog", &qu...
by picandies
Tue May 11, 2021 8:36 pm
Forum: General discussion
Topic: rpi4 lid with gpio access
Replies: 2
Views: 163

Re: rpi4 lid with gpio access

I just want a slot on top (ideally with pin numberings around the slot) to plug in Dupont wires at random pins, or maybe later on plug in a full ribbon cable (for now do not want ribbon). Seems like someone would have a lid. the stock black/gray case is from microcenter: https://www.microcenter.com/...
by picandies
Tue May 11, 2021 7:15 pm
Forum: General discussion
Topic: rpi4 lid with gpio access
Replies: 2
Views: 163

rpi4 lid with gpio access

I have an rpi4 & the stock black rpi case...but with the lid on there is no way to plug into the GPIO...is there a lid avail somewhere that has an opening above the GPIO header (along the lines of the rpio zero case)? I suppose I could get out my drill/saw, but thought I'd ask. Maybe even a 3D p...
by picandies
Tue May 04, 2021 11:19 pm
Forum: General discussion
Topic: Which pi is which
Replies: 40
Views: 2134

Re: Which pi is which

Yes my method would work… That's a smart move... they should have similar in place...they can laser or jetprint each one as it comes down the line...they do it for candybars & everything else! I noticed even our toilet paper roll has a jetprinted date code & a bunch of manufacturing numbers...
by picandies
Tue May 04, 2021 11:04 pm
Forum: General discussion
Topic: Which pi is which
Replies: 40
Views: 2134

Re: Which pi is which

Boot it up with RaspiOS and ask the operating system kernel to tell you.


There are NO CABLES OR POWER SUPPLY HERE ...how do I know which one to send? This is pretty ridiculous that they don't know aboutmarking it. Use a laser, or label.t.
by picandies
Tue May 04, 2021 10:12 pm
Forum: General discussion
Topic: Which pi is which
Replies: 40
Views: 2134

Which pi is which

I have a number of 2GB , 4GB, 8GB pi 4's... I went to grab an 8GB one to send to the test site, but couldn't figure out any marking as which one's are which. my set up is elsewhere at the test site.(there is no equipment, power supplies, etc at all here)..how do I know which one is the 8 Gb? Why is ...
by picandies
Mon Nov 30, 2020 3:14 am
Forum: Beginners
Topic: un-install/re-install of raspios
Replies: 9
Views: 471

Re: un-install/re-install of raspios

Note that many Windows tablets (being small) & maybe laptops have little (almost hidden) slots to insert a micro SD card...if so, you are all set to use one of those to set up your SD card.

Otherwise, you can get a usb SD reader anywhere, even Walmart for a few bucks.
by picandies
Sun Nov 29, 2020 11:59 pm
Forum: Other
Topic: Windows operating system
Replies: 6
Views: 1016

Re: Windows operating system

The newbie was most likely thinking "PC" windows, since it is so prevalent everywhere you go. They will simply have to make their choice from the available options for rpi. With a lot of elbow grease, & just for grins you can get Windows to operate on an rpi...however is it not for ser...
by picandies
Sun Nov 29, 2020 8:41 pm
Forum: General discussion
Topic: OS download is rather useless
Replies: 115
Views: 6001

Re: OS download is rather useless

from a few impatient people on slow internet connections that think their experience is representative of everyone else. There really isn't an issue here. You are quite certain of this claim?...you should note the connection was on a measured 200 mb/sec hookup & the pi connection was measured a...
by picandies
Sun Nov 29, 2020 8:00 pm
Forum: General discussion
Topic: OS download is rather useless
Replies: 115
Views: 6001

Re: OS download is rather useless

I think we should just leave the impatient people to go on and on about this non-issue in peace ! Why are you opposed to working on an improvement for the user experience? Do you wish everyone still used dial-up? People could go "on and on" about slow dial up rates. Agreeing to take some ...
by picandies
Sun Nov 29, 2020 6:57 pm
Forum: General discussion
Topic: OS download is rather useless
Replies: 115
Views: 6001

Re: OS download is rather useless

Having been on the maintenance side of the equation, building and testing releases and ensuring all is well takes a very real amount of time and resources. Plus the more often you do it, the more likely that you will end up putting out a broken release, as you have less time of soak testing. So whe...
by picandies
Sat Nov 28, 2020 6:28 pm
Forum: General discussion
Topic: OS download is rather useless
Replies: 115
Views: 6001

Re: OS download is rather useless

As far as I can tell the difference between downloading the old image and updating it versus downloading the nightly image is only the amount of file fragmentation on the resulting SD card. The difference, is a lot less server bandwidth needed & savings of up to 30-40 minutes during the install...
by picandies
Sat Nov 28, 2020 6:25 pm
Forum: General discussion
Topic: OS download is rather useless
Replies: 115
Views: 6001

Re: OS download is rather useless

if they download the released image and then apply the updates -- what's the difference in the end result ? finally, some common sense & reasoning! The difference, is a lot less server bandwidth needed & savings of up to 30-40 minutes during the install ...multiply that by millions of people.
by picandies
Sat Nov 28, 2020 6:19 pm
Forum: General discussion
Topic: OS download is rather useless
Replies: 115
Views: 6001

Re: OS download is rather useless

'old' here means latest image version tested, released and supported, so fit for beginners and 'users', not bleeding edge, expecting things to fai l' type of users. You fail to mention how that differs from what they get once the update is completed... WHY would a newbie doing their setup, being to...

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