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  1. Intelligent access control based on ESP32 and HMI

    Intelligent access control based on ESP32 and HMI

    This article uses STONE's touch screen to send commands to the MCU to control the relay and MFRC522 module. The principle of card reading: by driving the RFID-RC522 module, identify the ID card ID close to the ID card, and then determine whether the ID exists in the database of the word...
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    Intelligent access control based on ESP32 and HMI

    bancroft submitted a new Project Log: Intelligent access control based on ESP32 and HMI Read more about this project log here...
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    Charging process of charging pile

    I have recently completed the GUI for a project on EV charging piles, the next step I will consider is how to implement this charging process, do I need a row of battery packs? Or does anyone have a better way?
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    The mobile power bulges

    I am currently living in Sydney, Australia.
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    The mobile power bulges

    I was going to just throw it away. What if it was sorted as recyclable waste at the garbage sorting place? Maybe someone will dispose of it well.
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    How to use the gyroscope

    I just bought a gyroscope module MPU6050 a few days ago, because I want to use it together with my LCD, but I don't have a gyroscope in my LCD, so I have an external gyroscope module, can I achieve the same function? I wish it could achieve 360° rotation to watch a 3D model on the screen.
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    Can PIC microcontrollers be equipped with NFC modules?

    I want to develop an Android App, which needs to communicate with the PIC microcontroller for data and commands. Since the amount of data is small, I would like to use the NFC method of communication. Can I use the corresponding module for the PIC microcontroller? Or, which one do you recommend...
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    The mobile power bulges

    This looks really scary, I mean MPP to be exact, I think it is as likely to explode as a cell phone battery.
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    Library files about temperature sensors

    Thank you very much!!! This link really helped me a lot.
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    The mobile power bulges

    When the mobile power bulges, is it still possible to continue using it? I didn't have the photo in my hand and I was a little scared so I didn't dare to put it close to me.
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    Library files about temperature sensors

    I saw an article using the DHT11 temperature sensor and ESP32, I used the same DHT11 temperature sensor and Arduino Uno, copied its code but didn't find the library file for the temperature sensor called in the code. Is this something that can be found online or do I need to write it myself...
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    How to adjust the backlight of the LCD?

    I can see these four wires connected here.
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    The specific algorithm of baud rate when communicating with PIC microcontroller serial port?

    Thank you so much!!!
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    How to adjust the backlight of the LCD?

    Yes, it's a touch screen.
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    How to adjust the backlight of the LCD?

    I am attaching a close-up view of this part via attachment.
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    The specific algorithm of baud rate when communicating with PIC microcontroller serial port?

    My microcontroller is PIC16F877A, crystal 4M, I want to set the baud rate to 38400, please tell me the exact algorithm. Because the baud rate of my Bluetooth module is 38400, initially the baud rate of my microcontroller program is 9600, do I also have to set the baud rate of the microcontroller...
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    How to adjust the backlight of the LCD?

    I want to brighten my LCD, its specification says 300cd/m², I want to brighten it to 350cd/m²-400cd/m². How to adjust the backlight of the LCD?
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    What is the principle of swipe card to unlock?

    Thank you very much, I think this tutorial helped me a lot and I can understand RFID very well.
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    What is the principle of swipe card to unlock?

    I want to implement the function of swipe card unlock, then I want to know whether the reader reads the frequency of the card or ID? or something else.
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    What is the principle of swipe card to unlock?

    I got interested in swipe cards to unlock after reading an article today, but first I need to figure out two things. How do swipers identify different cards? And what does the so-called RF mean?
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