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by tony1812
Mon Apr 02, 2018 11:14 pm
Forum: Beginners
Topic: pi3 usb question
Replies: 4
Views: 361

Re: pi3 usb question

Thanks all for replying. A mutilated Pi3B with a single USB port and external powered hub will be much larger than a Pi3B with its 4 built-in USB ports. Your post makes no sense to me at all. Well, depends on where you put it, I have a very narrow "torso" on a robotic project, so far I really only n...
by tony1812
Mon Apr 02, 2018 2:41 pm
Forum: Beginners
Topic: pi3 usb question
Replies: 4
Views: 361

pi3 usb question

Hello, I am wonder about the pi3 four usb, they drive me nuts. With the ethernet, they took up so much space, so I yanked them all out left only one usb on the pi3. what is the different using the four usb on the pi vs, just use one but connect it to a four ports powered usb hub? What are the pros a...
by tony1812
Sun Mar 25, 2018 2:15 pm
Forum: Beginners
Topic: bluetooth pairs with multiple pis?
Replies: 9
Views: 436

Re: bluetooth pairs with multiple pis?

That's what I mean. Are there any limitations in the protocol to restrict this? Is there any way to get around?
by tony1812
Sun Mar 25, 2018 12:05 pm
Forum: Beginners
Topic: bluetooth pairs with multiple pis?
Replies: 9
Views: 436

Re: bluetooth pairs with multiple pis?

I wonder if there is some sort of protocol in bluetooth that only allows one pair at a time? I tried to pair the very same HC-05 from another pi3, the other pi3 never detected the HC-05 any more.
by tony1812
Sat Mar 24, 2018 9:58 pm
Forum: Beginners
Topic: bluetooth pairs with multiple pis?
Replies: 9
Views: 436

bluetooth pairs with multiple pis?

Hello, I have serval sensors connected to an Arduino, on the Aruino, I use a HC-05 to send serial data. On a pi3 I paired it with the HC-05, pi3 gets all the data. But what if I want to get the same data on another pi3 or piZero, can two or more pi pair the the same HC-05? Thanks.
by tony1812
Wed Mar 14, 2018 3:44 pm
Forum: Beginners
Topic: Yank out official 7" lcd usb?
Replies: 3
Views: 416

Re: Yank out official 7" lcd usb?

So it's ok if I yank it out since the power of the lcd draw from the pi 3 pins? ( it also has a micro usb for external power shall I need it.)
by tony1812
Wed Mar 14, 2018 2:41 pm
Forum: Beginners
Topic: Yank out official 7" lcd usb?
Replies: 3
Views: 416

Yank out official 7" lcd usb?

Hello, I have pi3 attached to the official 7" lcd display, in order to make it thinner, I yanked out all usb and ethernet ports to make it slimmer, which works fine. To slim even further, on the 7" lcd, there is also a full size usb on its circuit board. I am wondering if I yank out that USB port as...
by tony1812
Tue Feb 27, 2018 4:20 pm
Forum: Python
Topic: Python newbie question
Replies: 2
Views: 300

Re: Python newbie question

Thanks for the reply. I put the script in /etc/profile. Is it bad?
by tony1812
Tue Feb 27, 2018 1:55 pm
Forum: Python
Topic: Python newbie question
Replies: 2
Views: 300

Python newbie question

Hello, I asked a similar question before but never got an answer. The question is this, I have two scripts, one uses Tinker as UI, the other uses wx as UI. Either case. the UI shows up in a window that has the title bar(the blue bar) close button etc. Nothing wrong about it. However, once I set the ...
by tony1812
Mon Feb 26, 2018 9:38 pm
Forum: Beginners
Topic: 3.5"lcd vs 7" lcd
Replies: 3
Views: 305

Re: 3.5"lcd vs 7" lcd

Thanks for the reply. Does it mean the DSI monitor doesn't need the 99-calibration.conf file?
by tony1812
Sun Feb 25, 2018 9:11 pm
Forum: Beginners
Topic: 3.5"lcd vs 7" lcd
Replies: 3
Views: 305

3.5"lcd vs 7" lcd

Hello, I've been playing with various sizes LCDs in the past few days trying to learn how they work. I don't understand why a lcd like this : 7" https://www.amazon.com/Raspberry-Pi-7-Touchscreen-Display/dp/B0153R2A9I just plug in the ribbons and the lcd works and the touches are all in place, no nee...
by tony1812
Wed Feb 21, 2018 5:42 pm
Forum: Beginners
Topic: xinput-calibrator
Replies: 28
Views: 64300

Re: xinput-calibrator

I know this post is about two years old. But I have the same issue with my 3.5" touch LCD. I posted the one the forum but no one answer, hope you can help. On and off, for the past few days, I unsuccessfully try to get the 3.5 LCD display working on my pi3 with the latest stretch. The LCD is this: K...
by tony1812
Tue Feb 20, 2018 2:29 pm
Forum: Beginners
Topic: How to calibrate 3.5" LCD?
Replies: 5
Views: 1761

Re: How to calibrate 3.5" LCD?

That was a copy and paste to this forum mistake, In the file itself it has the "S". Anything else is wrong?
by tony1812
Tue Feb 20, 2018 12:50 pm
Forum: Beginners
Topic: How to calibrate 3.5" LCD?
Replies: 5
Views: 1761

Re: How to calibrate 3.5" LCD?

Thanks for the reply. Than content of the 99-calibration.conf is : ection "InputClass" Identifier "calibration" MatchProduct "ADS7846 Touchscreen" Option "Calibration" "29 1231 1173 212" Option "SwapAxes" "1" EndSection Is there something wrong with it? One thing I don't quite understand is this Opt...
by tony1812
Mon Feb 19, 2018 7:40 pm
Forum: Beginners
Topic: How to calibrate 3.5" LCD?
Replies: 5
Views: 1761

How to calibrate 3.5" LCD?

On and off, for the past few days, I unsuccessfully try to get the 3.5 LCD display working on my pi3 with the latest stretch. The LCD is this: Keyestudio TFT LCD Display 3.5 Inch 480x320 16-bit TFT Touch Screen LCD Shield for Raspberry Pi Model B B+ A+ A Module a wareshare35a lcd I followed this ins...
by tony1812
Sat Feb 17, 2018 3:19 pm
Forum: Python
Topic: micropython
Replies: 8
Views: 1311

Re: micropython

"If you plan your project to be running just on the RPi then your better off using the standard python. Although there is a version of micro python for linux that runs on the RPi it is more design for writing and testing/debugginh your micro python code before flashing it to your micro controller " ...
by tony1812
Fri Feb 16, 2018 9:06 pm
Forum: Python
Topic: micropython
Replies: 8
Views: 1311

Re: micropython

Thank you. you are right , I navigate to the ./micropython directory. create a test.py file, the file has only 2 lines import utime and import ustruct, use ./micropython test.py instead of just python test.py, it does not complain anymore. :) However, git clone https://github.com/adafruit/micropytho...
by tony1812
Fri Feb 16, 2018 7:21 pm
Forum: Python
Topic: micropython
Replies: 8
Views: 1311

Re: micropython

Thanks The one for ssd1306 i2c is just a standard python. I thought it is gone be easy to keep the same PIL code base. Not until today I had never heard of this MicroPython. One more layer of confussion to the Python land. "The utime package might however be included. Take a look here - viewtopic.ph...
by tony1812
Fri Feb 16, 2018 5:04 pm
Forum: Python
Topic: micropython
Replies: 8
Views: 1311

micropython

Hello, I have a ssd1306 i2c oled I followed this guide, https://learn.adafruit.com/ssd1306-oled-displays-with-raspberry-pi-and-beaglebone-black/usage everything works fine. I also have a 96x64 spi ssd1331 oled. I followed the same guide, except I use this line git clone https://github.com/adafruit/m...
by tony1812
Tue Feb 13, 2018 10:00 pm
Forum: Beginners
Topic: set up SSd1331 OLED for pi3. Please help.
Replies: 2
Views: 499

Re: set up SSd1331 OLED for pi3. Please help.

I change the pi to SSD1331_PIN_CS = GPIO 23 BCM 16 SSD1331_PIN_DC = GPIO 24 BCM 18 SSD1331_PIN_RST = GPIO 25 BCM22 to match the code in Ray Tracer 's master SSD1331.py in line 604 for balloon.bmp I give it the full path ( otherwise it will complain it couldn't find the file. Still not thing happen! ...
by tony1812
Tue Feb 13, 2018 4:56 pm
Forum: Beginners
Topic: set up SSd1331 OLED for pi3. Please help.
Replies: 2
Views: 499

set up SSd1331 OLED for pi3. Please help.

Hello, I am so very frustrated! :o I look at many tutorials about doing this.To no avail. My SSD1331 works just fine on the Arduino.But I somehow after try and try, can't get it to work with the pi3. First of all the connection labels for SPI seem a bit messed up. I followed this http://graef685.wix...
by tony1812
Tue Feb 13, 2018 2:23 pm
Forum: Beginners
Topic: unassembled pi3
Replies: 22
Views: 1724

Re: unassembled pi3

Thanks mikerr ,

that video helps.
by tony1812
Tue Feb 13, 2018 12:05 pm
Forum: Beginners
Topic: unassembled pi3
Replies: 22
Views: 1724

Re: unassembled pi3

I think some of you business minded guys are missing the point. 1. this is simply an experimental/teaching project, never meant to re-invent the wheel. Apple, Samsung, LG... are already doing too good of a job, dump the market with tablets, polluting the planet. 2. It will never be commercially feas...
by tony1812
Tue Feb 13, 2018 12:38 am
Forum: Beginners
Topic: unassembled pi3
Replies: 22
Views: 1724

Re: unassembled pi3

Just a thought, after thinning the pi3, I could probable use the bottom of the 7" LCD panel which is all metal, put a bit of cpu paste on the chip then use it as a large area heat sink, yes? Plus in normal use with wifi on the cpu heat is only about 70°C in a 3D printed box without any heat sink or ...
by tony1812
Mon Feb 12, 2018 8:49 pm
Forum: Beginners
Topic: i2c or spi?
Replies: 12
Views: 1174

Re: i2c or spi?

I think I got the naming convention now.

SDA=MOSI->GPIO2(BCM3)
SCL=SCK=CLK=SCLK->GPIO3(BCM5)
RES=REST->GPIO24(BCM18)
CS=CE0=CS0->GPIO16(BCM36)
DC->GPIO23(BCM16)
VC->3.3V
GND->GND

Does this look right?

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