通过USB连安卓手机的Arduino能否无需Root获取IMEI？

Hey there! Let’s cut to the chase: you can’t directly pull an Android phone’s IMEI using an Arduino over USB without rooting the device. Here’s the breakdown of why that’s the case, plus some practical workarounds if you need this data for your project.

Why Direct Access Is Blocked #

• Android’s Security Guardrails: IMEI is classified as sensitive user data, and Android’s permission system (across all modern versions) locks down access to this identifier. Even apps running on the phone need the READ_PHONE_STATE permission to retrieve IMEI—and this permission is only granted to apps installed on the device itself. External hardware like Arduino has no way to invoke the phone’s system APIs to grab this info.
• USB Communication Limits: When Arduino connects to Android via USB, the two talk using protocols like USB Serial or HID. These only let them send/receive data that the phone explicitly shares. The Arduino can’t peek into the phone’s internal system storage or API layers where IMEI is stored.

Workarounds to Get the IMEI to Your Arduino #

If you need the IMEI in your project, here’s how to do it without rooting:

• Build a Tiny Companion App: Create a simple Android app that asks for the READ_PHONE_STATE permission (note: on Android 10+, this permission has stricter rules—your app needs a valid use case, like a telecom tool). Once granted, the app can fetch the IMEI using TelephonyManager.getImei() and send it over USB serial to your Arduino.
• Use Alternative Identifiers: If IMEI isn’t strictly necessary, consider easier-to-share options:
  • A custom UUID generated by your companion app
  • The phone’s Bluetooth MAC address (just keep in mind Android 12+ randomizes this by default for privacy)

Quick Recap #

No direct access without rooting, but a small companion app is the legal, secure way to get the IMEI from your phone to your Arduino.

内容的提问来源于stack exchange，提问作者Houssam Badri