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by abhi143
Mon Aug 16, 2021 8:45 am
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

just accept that your pi is dead and buy a new one. I agree with you. I'm looking new one RP3B+ Are the products given in the link the same or there is a difference. Suggest me good one https://www.electronicscomp.com/buy-raspberry-pi-3-model-b-plus-india?gclid=CjwKCAjwmeiIBhA6EiwA-uaeFdKf12C3-CqH5...
by abhi143
Sun Aug 15, 2021 11:09 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

pcmanbob wrote:
Sun Aug 15, 2021 9:10 pm

It's most likely a hardware failure on the pi.
One thing is clear that sd card and PSU is not a problem.

To detect short circuit, I take continuity test with multimeter.

How can it be found, Which part of the pi is damaged due to which it is not working. ?
by abhi143
Sun Aug 15, 2021 10:56 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

FWIW I've just checked the behaviour of my P3B+ that boots from a USB connected SSD and has no uSD card inserted. Red LED on throughout (indicating power is on). Green LED is on briefly (until the SSD is detected?) then goes out for a while and eventually flashes (4 times) ~once a second when polli...
by abhi143
Sun Aug 15, 2021 3:17 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

It's been a while since I booted one of my 3B+'s from USB and not sure if the green (activity) LED flickers when doing so. TBH it would be best if you could connect to a monitor rather than attempt headless to test things out. For now I'll leave this thread for those more knowledgeable than me to a...
by abhi143
Sun Aug 15, 2021 3:17 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

FWIW I've just checked the behaviour of my P3B+ that boots from a USB connected SSD and has no uSD card inserted. Red LED on throughout (indicating power is on). Green LED is on briefly (until the SSD is detected?) then goes out for a while and eventually flashes (4 times) ~once a second when polli...
by abhi143
Sun Aug 15, 2021 2:24 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

Yes. Assuming the Sandisk is your pen drive and you understand any data on that drive will be wiped clean. I loaded OS on pen drive and then inserted pen drive into raspberry PI3 B+ I gave power to raspberry PI3 B+ but green light is not blinking. only red is on. It's looks PI3 B+ has been damaged....
by abhi143
Sun Aug 15, 2021 1:59 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

wildfire wrote:
Sun Aug 15, 2021 1:38 pm
Yes, if sdcard slot is empty the 3B+ will look for a usb boot device without prior hardware configuration.
PendB.jpg
PendB.jpg (41.27 KiB) Viewed 883 times
okay so I've inserted pen drive to to usb port of laptop

Can I directly write to os on pen drive as I shown in above image ?
by abhi143
Sun Aug 15, 2021 1:36 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

confused, will pi3B+ boot from a usb device without any prior setting ?
by abhi143
Sun Aug 15, 2021 1:19 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

what is "ab=nd" ? All you can try now is booting from usb device as it seems I might be wrong and the pi 3B+ might be set to boot from usb by default. Have you ever booted from pen drive ? I've SanDisk Cruzer Blade SDCZ50-016G-135 16GB USB 2.0 Pen Drive https://www.amazon.in/SanDisk-Cruze...
by abhi143
Sun Aug 15, 2021 12:17 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

have you tried flashing a new copy of RPI OS to another SD card ab=nd tried that to see if the pi will boot ? Yes I've tried at least three Micro SD card what is "ab=nd" ? did you check for the 3.3V on the gpio header as if that is not present your will never get the pi to work. yes.. vol...
by abhi143
Sun Aug 15, 2021 10:10 am
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

Then that would indicate that the 5V power to your pi is good, but if you have no flashing of the Green LED it would indicate a hardware failure of the pi its self. if its still under warranty I would contact your supplier and ask for it to be replaced. warranty period has expired may be I would bu...
by abhi143
Sun Aug 15, 2021 9:42 am
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

With the SD card removed if you power your pi what are the red and green LED's doing ? Red should be on all the time green should flash 4 times in a repeating cycle Also if you have a screen connected you may get a display with some error messages. When I power, only red light stay on forever. gree...
by abhi143
Sun Aug 15, 2021 9:18 am
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

and is this any help for a psu in India https://www.pibox.in/product/elementz-engineers-guild-pvt-ltd-stontronics-t6090dv-official-ac-dc-power-supply-usb-uk-euro-for-raspberry-pi-3-model-b/ Hi pcmanbob I have bought that official charger but green light is not blinking when I plug microsd card load...
by abhi143
Tue Jul 13, 2021 11:01 am
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

I've checked all suppliers all adapter are sold out I've charger takes an AC Input 100-240 V and gives 5V 3.1A DC output.
https://ecalorie.co/product/md2350/
Can I use it to power my Pi ? Could it be damage my raspberry Pi3 B+
by abhi143
Mon Jul 12, 2021 5:53 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

fruitoftheloom wrote:
Mon Jul 12, 2021 3:13 pm
whist the Official 5.1V 2.5A Power Supply is rock solid.
I live in India and I want to buy a Official 5.1V 2.5A Power Supply adapter

can you please provide me any link from where i can order online
by abhi143
Mon Jul 12, 2021 2:30 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

Re: green light not flashing

LTolledo wrote:
Mon Jul 12, 2021 2:19 pm
what are you powering this setup of yours?
I'm using 5v @2A mobile charger. I don't think there is any problem with this as I had installed a rasbain with same charger
by abhi143
Mon Jul 12, 2021 2:14 pm
Forum: General discussion
Topic: green light not flashing
Replies: 36
Views: 1920

green light not flashing

I've Raspberry Pi 3B+ The card has Raspberry Pi OS load on it. I insert microSD card on Pi. when I power Pi. Only the red led glows. I do not get the green light flashing so I suspect a power problem.. or a microSD card problem 1. If the OS is corrupted, will the green light blink ? I think it won't...
by abhi143
Wed Dec 11, 2019 9:56 am
Forum: C/C++
Topic: Simple example of class and object
Replies: 27
Views: 2680

Re: Simple example of class and object

To me you are the one going in circles, so lets just define it as like circle (a pun) from rst that is an entire general O/S for the Pi in C++ https://github.com/rsta2/circle I take it that is the sort of thing he is trying to do. What he is asking is how should he start out with the class and inhe...
by abhi143
Mon Dec 09, 2019 9:28 am
Forum: C/C++
Topic: Simple example of class and object
Replies: 27
Views: 2680

Re: Simple example of class and object

Your question does not make much sense. Or is very vague anyway. I am agree lthere is no much difference between general c++ programming and Embedded c++ programming. only difference is that we use general c++ programming to write program for PC for example MFC on windows. we use embedded c++ progr...
by abhi143
Mon Dec 09, 2019 3:22 am
Forum: C/C++
Topic: Simple example of class and object
Replies: 27
Views: 2680

Re: Simple example of class and object

abhi143, . All in all I would suggest learning more about C++ and object oriented programming before you start worrying about classes in embedded programming. Thanks to all of you for excellent advice's @Heater I am totally agree with you. I am not very good at c++ programming but I am practicing o...
by abhi143
Sun Dec 08, 2019 3:12 am
Forum: C/C++
Topic: Simple example of class and object
Replies: 27
Views: 2680

Simple example of class and object

I understand what is a class and object I am looking simple example of class and object in c++ for electronics project Class is a blueprint for an object. Classes describe the type of objects. The object can be of different types: A class can have both data members and functions members associated w...
by abhi143
Tue Aug 14, 2018 3:43 pm
Forum: C/C++
Topic: Web interfacing with CGI script /C++
Replies: 7
Views: 2401

Re: Web interfacing with CGI script /C++

This very well written tutorial on doing CGI with C++ tells you everything you need to know: https://www.tutorialspoint.com/cplusplus/cpp_web_programming.htm Or perhaps this: http://www.yolinux.com/TUTORIALS/LinuxTutorialC++CGI.html If you google around for "web programming C++" and such ...
by abhi143
Mon Aug 13, 2018 2:02 pm
Forum: C/C++
Topic: Web interfacing with CGI script /C++
Replies: 7
Views: 2401

Re: Web interfacing with CGI script /C++

I have written html and c++ program but I don't understand how to mix html button code and c++ code.

Can anyone help me how to make complete program
by abhi143
Fri Aug 10, 2018 1:37 am
Forum: C/C++
Topic: Web interfacing with CGI script /C++
Replies: 7
Views: 2401

Re: Web interfacing with CGI script /C++

This problem solved, your program will run in an endless loop and the browser will wait for a response. Maybe you get a timeout error after a few minutes. I removed forever loop so when button click, led would flash only one time #include <iostream> using namspace std; #include <wiringPi.h> int mai...
by abhi143
Thu Aug 09, 2018 12:04 pm
Forum: C/C++
Topic: Web interfacing with CGI script /C++
Replies: 7
Views: 2401

Web interfacing with CGI script /C++

I am trying to access gpio of raspberry Pi via web interface. When button pressed on web page, Led would be flash This is simple CGI script . I tested it works sudo nano /usr/lib/cgi-bin/test.cgi #!/bin/sh echo "Content-type:text/html\n" echo '<!DOCTYPE html>' echo '<html>' echo ' <body>' ...

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