Comments on: Arduino Time Attendance System with RFID https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/ Learn ESP8266, ESP32, Arduino, and Raspberry Pi Fri, 09 Feb 2024 16:15:31 +0000 hourly 1 https://wordpress.org/?v=6.8.2 By: ojas https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/#comment-889572 Fri, 09 Feb 2024 16:15:31 +0000 http://randomnerdtutorials.com/?p=61725#comment-889572 Hello , Im facing an error while uploading the code.
avrdude: ser_open(): can’t set com-state for “\.\COM5”

How can i resolve it?

]]> By: Sara Santos https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/#comment-838438 Fri, 02 Jun 2023 08:29:53 +0000 http://randomnerdtutorials.com/?p=61725#comment-838438 In reply to Kiandro.

Hi.
Check if the microSD card is properly inserted on the slot.
Double-check the wiring.

Regards,
Sara

]]> By: Kiandro https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/#comment-838212 Wed, 31 May 2023 17:22:38 +0000 http://randomnerdtutorials.com/?p=61725#comment-838212 I checked my wiring and code and everything is fine, but when test this I get this: ‘Initializing SD card….. initialization failed;”
What did I do wrong?

]]> By: Jerzy Małczyński https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/#comment-731888 Mon, 14 Mar 2022 20:53:20 +0000 http://randomnerdtutorials.com/?p=61725#comment-731888 welcome at the beginning forgive my English, it’s poor, I have read the projects posted on your website, they are all interesting and very well described, one of them – Arduino Time Attendance System with RFID == I was so interested that I decided to expand it a bit and added an oled display 1306, which shows the commands printed in the serial monitor, IDE, I changed it a bit and it works so that it only grants access to one IC card and blocks the rest, and I have a small problem here, I would like to add two or three IC cards that will have access and others not , but I don’t know how to add the remaining IC cards – {see the attached screen), I will be very grateful for your help, best regards Jerzy

]]> By: Sana Shaikh https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/#comment-568803 Wed, 10 Mar 2021 09:08:18 +0000 http://randomnerdtutorials.com/?p=61725#comment-568803 Hello,
I connected 3.3K resistor between SD card MISO and MISO of MEGA,but still not detecting card.
Your help will be appreciated!

]]> By: Bhavdeep Singh Krishnawat https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/#comment-539388 Sun, 10 Jan 2021 15:26:18 +0000 http://randomnerdtutorials.com/?p=61725#comment-539388 In reply to Lemon.

same error for me also plz help

]]> By: idriss https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/#comment-418128 Mon, 30 Dec 2019 20:47:32 +0000 http://randomnerdtutorials.com/?p=61725#comment-418128 In reply to Elias.

hello ,
elias it’s work thank you
nerd 1

]]> By: Lemon https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/#comment-403909 Wed, 30 Oct 2019 14:19:30 +0000 http://randomnerdtutorials.com/?p=61725#comment-403909 In reply to Sara Santos.

Yes its only say that SD card initialization done and nothing happens

]]> By: Sara Santos https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/#comment-403663 Tue, 29 Oct 2019 11:13:10 +0000 http://randomnerdtutorials.com/?p=61725#comment-403663 In reply to Lemon.

Hi.
What do you mean?
Do you get any errors on the serial monitor?

]]> By: Lemon https://randomnerdtutorials.com/arduino-time-attendance-system-with-rfid/#comment-403458 Mon, 28 Oct 2019 13:00:29 +0000 http://randomnerdtutorials.com/?p=61725#comment-403458 In reply to Surya Saini.

Can you plz tell me a code for RTC DS3231. This code is not working properly for me.

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