{"id":757,"date":"2024-01-23T12:35:00","date_gmt":"2024-01-23T11:35:00","guid":{"rendered":"https:\/\/itsonix.laolaweb.com\/?p=757"},"modified":"2026-05-13T12:37:32","modified_gmt":"2026-05-13T10:37:32","slug":"anonymous-usage-statistics-via-rfid-reader","status":"publish","type":"post","link":"https:\/\/itsonix.eu\/en\/blog\/anonyme-nutzungsstatistiken-mittels-rfid-reader\/","title":{"rendered":"Anonymous usage statistics via RFID readers"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Thanks to various client projects involving IoT environments, we have relevant experience and expertise in developing our own hardware components. In one of our earlier blog posts (HR Dashboard), we already discussed how our Xperts use their skills to take our internal processes to the next level.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Our Xperts are currently working on the check-in and check-out process for the free lunch buffet at the office. This is offered twice a week as part of our Work &amp; Enjoy program and not only provides an enjoyable experience but also fosters strong team cohesion. This results in a monetary benefit that is subject to taxation. To ensure the benefit is taxed correctly, we have previously kept a list on which employees note their participation on the respective day.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Even though this list seems to be the most obvious and easiest choice, it does have some drawbacks:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Privacy Concerns<\/li>\n\n\n\n<li>Excessive Data Collection<\/li>\n\n\n\n<li>Comprehensive Analysis<\/li>\n\n\n\n<li>Does not meet the standards expected of a modern IT company<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">How can our Xperts' expertise simplify and improve this process?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Digital Solution<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To meet our own requirements, we ultimately decided to go digital. The primary goal was to reduce the effort involved in data entry and further processing. We quickly settled on a solution that integrates with our door-access chip, which all IT Sonix employees possess and use daily. This chip can be scanned by an RFID reader, and the collected data is then stored anonymously in a web application and analyzed.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"445\" src=\"https:\/\/test.itsonix.eu\/wp-content\/uploads\/2026\/05\/Entwicklungsboard-1024x445.jpg\" alt=\"\" class=\"wp-image-758\" title=\"Development Board\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The door chip is read using an ESP8266 chip connected to an RFID reader. For this, we\u2019re relying on the tried-and-true D1 Mini development board. Availability and price were the main factors in this decision. In addition, this IoT module already has a USB port, and the necessary I\/O ports are easily accessible. To best meet the hardware requirements for our application, we created our own enclosure using a 3D printer and then positioned the hardware appropriately inside it. An external power bank provides power via USB.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For ease of use, we installed the \u201eTasmota\u201c firmware on the D1 board using the Web Installer. This allowed us to use the RDM6300 125 kHz RFID reader without any programming effort; it was simply soldered to the D1\u2019s I\/O and power pins. All that\u2019s left to do is select the correct pin via the Tasmota web interface, and the ID of every stored door chip is read. Since these IDs constitute indirect personal data, they are hashed using the bcrypt algorithm along with a random salt, thereby anonymizing them.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why AWS?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">We decided to use AWS as our cloud infrastructure for the following reasons:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sales-related issues resulting from an increase in customer inquiries<\/li>\n\n\n\n<li>Knowledge Building Among the Participating Experts<\/li>\n\n\n\n<li>Easy integration with Tasmota is possible<\/li>\n\n\n\n<li>Serverless MQTT Broker via AWS IoT with No Configuration Required<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Based on our experience with IoT applications, we have decided to implement most of the required infrastructure (messaging, persistence) using a serverless approach. This approach is not only standard practice but also offers significant cost advantages.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Implementation on AWS<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tasmota creates a message containing the door chip's identification number, along with the date and time. This message is sent to AWS IoT and then forwarded to AWS SQS (Simple Queue Service) via an IoT Event Rule. Since AWS IoT generally operates without persistence, but SQS retains the data for four days, this is an appropriate solution. This helps prevent data loss in the event of a short-term outage of the backend service.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The service was built using Spring Boot; it consumes the messages stored in the SQS topic and saves the data to a NoSQL database (DynamoDB). It is essential to ensure that events are not processed more than once. This happens when employees repeatedly hold their door access cards up to the reader. An email containing the number of events is automatically sent to our accounting department every day. The data is also made available via a REST API.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Development Outlook<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For the subsequent implementation phase, plans include, among other things, the ability to check the number of seats still available based on check-in events. An intuitive web application will make this process accessible to all employees. In addition, an anonymized feedback feature, including analysis, is also in the planning stages.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aufgrund diverser Kundenprojekte mit IoT-Umgebungen verf\u00fcgen wir \u00fcber einschl\u00e4gige Erfahrung und Expertise in der Entwicklung eigener Hardwarekomponenten. Bereits in einem unserer fr\u00fcheren Blogbeitr\u00e4ge (HR-Dashboard) haben wir dar\u00fcber berichtet, wie unsere Xperten ihre Kompetenzen daf\u00fcr einsetzen, um unsere internen Prozesse auf ein neues Level zu heben. Aktuell befassen sich unsere Xperten mit dem Ein- und Auschecken [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":759,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[22],"tags":[],"class_list":["post-757","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-innovation-space"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Anonyme Nutzungsstatistiken mittels RFID-Reader - IT Sonix - Ihr Partner f\u00fcr individuelle Softwarel\u00f6sungen<\/title>\n<meta name=\"description\" content=\"it Sonix Blog: Anonyme Nutzungsstatistiken mittels RFID-Reader\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/itsonix.eu\/en\/blog\/anonymous-usage-statistics-via-rfid-reader\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Anonyme Nutzungsstatistiken mittels RFID-Reader - 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