DS28C family; is an I2C security IC used in embedded systems requiring secure authentication, device authentication and secure access. This library provides communication with DS28C ICs through a minimalist but powerful API.

Features​

With this library, you can easily perform the following operations via DS28C:

• Secure authentication over I2C
• Unique ID reading
• SHA-256 based challenge–response operations
• Secure access to memory areas
• Fast initialization & low resource consumption
• Full compatibility with Arduino and similar microcontrollers

All I2C traffic is optimized and suitable for secure operation on low power consuming devices.

Application Scenarios​

DS28C is especially preferred in the following areas:

• Blocking fake devices in IoT devices
• Secure authentication in battery packs
• License protection in industrial equipment
• Unique ID verification in sensor modules
• Secure protocol application in smart agriculture & field devices

It is an ideal security solution for commercial products requiring device authentication.

Installation​

Arduino IDE​

1. Arduino IDE → Library Manager
2. Search: DS28C
3. Install akkoyun / DS28C library

PlatformIO​

Add to platformio.ini:

lib_deps = akkoyun/DS28C

If you wish, you can fix the version:

lib_deps = akkoyun/DS28C@^1.0.0

Basic Usage​

#include <DS28C.h>

DS28C auth;

void setup() {
    Serial.begin(115200);
    auth.begin();
}

void loop() {
    uint64_t uid = auth.getUID();
    Serial.print("UID: ");
    Serial.println(uid, HEX);

    delay(1000);
}

When the library is initialized, the device is automatically scanned and becomes available for verification.

Advanced Functions​

This library also includes the following security functions:

• readMemory() — Secure memory reading
• writeMemory() — Authorized memory writing
• computeSHA() — SHA-256 challenge–response
• verify() — Device verification
• getUID() — Unique ID reading

Offers a lightweight and reliable solution in security-focused embedded projects.