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NFC/RFID

6 Posts authored by: bernhardmayer
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 ...
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 ...
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 ...