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NFC/RFID

20 posts
My first prototype used a ST M24LR-Discovery board where some traces were cut and the M24LR was connected to a Arduino Uno. This was an advanturous construction and not very solid. So I decided to use a ST X-NUCLEO-NFC02A1(https://www.st.com/content/st_com/en/products/ecosystems/stm32-open-development-environment/stm32-nucleo-expansion-board… ) which can be stacked on an Arduino.   Unfortunatelly on this board ST connected the IOREF pin directly to the 3.3V rail:   On the Ar ...
During the last few days I put together all the design data of the HMI shield I used in this project and uploaded them to my website.     The shield is called ArduHMI and all the information can be found on my website: ArduHMI - Graphic HMI for Arduino The shield is compatible with different lcd modules from EA (https://www.lcd-module.com/produkte/dog.html): EA DOGS102-6 102x64 pixel - 1.7" EA DOGM132-5 132x32 pixel - 2.1" EA DOGM128-6 128x64 pixel - 2.3"   It also has a ...
Choosing the right font for the display is always a difficult task. Especially for small displays there is only a limited number of fonts available and often they come from the display manufacturer and have some restrictions on their library. On the other hand there are nearly unlimited true type fonts available on your computer.   So I wrote a converter.   My display EA DOGM128-6 comes with a library. This library doesn't map the display content in its memory but writes it directly ...
This video tip applies to any cards like this that use NFC, e.g. keycards from hotels, amusement parks, and wristbands from certain events. Just try scanning the card with your phone to see if it's NFC-based. If it is, you'll be able to use apps like Automate on Android to trigger apps, sound profiles, home automation tasks, and much more!   It certainly beats sticking them in the bin! Turn them into something useful & help automate your life   ...
Today I want to give an update on my NFC badge with some improved functions. Unfortunately the code and the video are of low quality as this is work in progress.   In my last blog post (NFC-Badge - Update your badge with your smartphone - NDEF and app ) I described how the data is formatted on the eeprom. So I wrote some code which decodes this data. It checks if there is valid NDEF data on the eeprom and then goes down through all the NDEF messages and recordings. When it finds a text rec ...
As already mentioned in my last blog post (NFC-Badge - Update your badge with your smartphone - Proof of concept ) the content of the ST M24LR or any NFC tg is usually formatted in the NFC Data Exchange Format (NDEF). I found it very hard to get the meaning of every single byte so I will post my summary here.   NFC Tag Type  There exist five different types of NFC tags. This is described at this website: https://www.dummies.com/consumer-electronics/5-nfc-tag-types/ From this website ...
ipv1

NFC and The Raspberry Pi

Posted by ipv1 Top Member Jun 14, 2019
NFC RFID Enter Your Electronics & Design Project for a chance to win a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   NFC is very useful and is easy to use considering the availability of the parts. I made a project with NFC and Raspberry Pi as follows.   Like many people, I work in a room with a workbench, lights, fans, Air-Conditioning and bench test equipment etc. During work hours I have a habit of taking trips away f ...
NFC RFID Enter Your Electronics & Design Project for a chance to win a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Introduction    Badges are quite popular but updating their content often requires programming. Although some of them use Bluetooth or WiFi. I want to show that you also can use your smart phone and NFC to update the content.   ST M24LR My badge is heavily based on the ST M24LR (https://www.st.c ...
Milos Rasic

S.H.E.L.F. V2

Posted by Milos Rasic Jun 13, 2019
NFC RFID Enter Your Electronics & Design Project for a chance to win a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   S.H.E.L.F. V2   1. Introduction S.H.E.L.F. V1 V1 Results 2. Plan How will it work? Features 3. Build ESP8266-07 Module Connection for the ESP8266-07 Uploading to ThingSpeak First Serial Test Scale Sensors Connection and Code Testing RC522 RFID Module ...
Fred27

LockNFC - front door

Posted by Fred27 Jun 9, 2019
I said this NFC/keypad lock was going to have a number of uses, and it is. The garage door was the easiest as all I needed to do was simulate a button press. A loftier goal was to make something that fitted my front door. There were a number of rules. It must look professional. No dangling wires or bits duct taped to the back of the door. It must be possible to still use the normal key to open the door. Any electronic failure must mean the door can be operated normally. As you can probably g ...
Like so many other projects, this one started with someone saying to me “wouldn’t it be great if...”   So, I thought the best place to start part 2 of my NOVSIS Proof of Concept (POC) project is with a video demo and then I will unpack the various elements that make up the project.   If you have no idea what I'm talking about in this blog, maybe read part 1 first.     5.0 The NOVSIS Demo      6.0 Unpacking the Visitor Sign-In Interface &# ...
NFC RFID Enter Your Electronics & Design Project for a chance to win a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Introduction It was always interested in a device talking with another device, especially when you start  seeing responses back. Talking to vending machine using MDB protocol is one of that amazing adventures. My goal is to prototype a simple payment system using RFID tags for paying for a vend. Payment pol ...
So, I have a number of potential locations where my NFC lock might be useful. I decided to start with the easiest - my garage door. Operating a lock is easy if the door is already motorized and I just need to simulate a button press! I did a little investigating into the door opener. The useful connections I found were: Header 1 Header 2 Ground A reference ground. I didn't check whether it was isolated from the mains earth powering the door opener. It shouldn't matter. Power There is a power out ...
**   Indeffed (slang): Used to describe a user, account, or IP address that is indefinitely blocked or banned from certain or all actions.   1.0     Introduction   We all know the drill. We arrive, smile at the receptionist and in a friendly voice explain that you’re So-n-So from Company X-Y-Z and have a meeting with Mr. or Ms. You-Know-Who. The receptionist then dutifully instructs you to fill in your details in the Visitor’s Book and then o ...
Fred27

LockNFC - firmware

Posted by Fred27 May 16, 2019
Microcontroller-based hardware is just a PCB until you have some firmware running on it. Time to get it doing something. I'd already protyped both the capacitive touch keypad and the NFC reader firmware on a development board and I check that they ran together on my PCB when it came back from the fab. There was a lot of tidying up left to do.   I decide that I'd make the device battery powered. The MSP430 is designed to be low power and the locations I intended to use it weren't ideal for ...