Write NDEF Data idChamp RS4 and iScanBrowser iOS

This article demonstrates how to use the idChamp RS4 and iScanBrowser for iOS to write NDEF data to NFC tags. In the first section of this guide, we’ll learn how to write an NDEF record to a tag. In the second section, we’ll test the tag by reading the NDEF data. You will need:

  • an idChamp RS4 RFID reader
  • an NFC tag to write to
  • an iPhone or iPad

Before you get started, you’ll want to download iScanBrowser from the AppStore, power on your idChamp RS4, and launch iScanBrowser once it has finished downloading.

Write NDEF Data

1. Navigate to the Device Manager.

2. Tap on the idChamp RS4’s wireless name when it appears beneath “LE Devices.”

RS4 iScanBrowser device manager

3. Once the RS4 is paired, it will appear beneath “Connected Devices.” Tap on the gear icon to the far-right of the RS4’s wireless name. This will take you to the device settings for the RS4.

RS4 iScanBrowser device settings

4. Tap on “Write NDEF Data

RS4 iScanBrowser Write NDEF Data

5. Hold the NFC tag up to the RS4 and follow the prompts displayed from iScanBrowser.

RS4 iScanBrowser wait for detecting tag to write NDEF data

Once the tag is detected, iScanBrowser will display the option to: 

  • Add new NDEF record
  • Add new NDEF record from history
  • Read the current tag
  • Write to the current tag

6. Tap on “Add new record” to add a new NDEF record.

RS4 iScanBrowser add new NDEF record

7. Select “Text” if the intended data is text and “URL” if the intended data is a URL, then type in the data beneath “DATA.”

RS4 iScanBrowser add NDEF record text data

8. Tap “Done” (located at the top right corner). You will now see this NDEF record you just added in the NDEF records section. 

9. Tap on “Write current tag.”

RS4 iScanBrowser write to current tag

This writes the NDEF record(s) to the tag. You should see a “Write successful” alert.

Read NDEF Data

1. If you haven’t already, exit from the Write NDEF Data screen by tapping on the “Done” button located at the top right-hand corner of the screen.

2. Beneath the Device Settings section for the RS4, tap on the option labeled “UserData Post Format.”

RS4 iScanBrowser change UserData Post Format

3. Select “NDEF” as the data post format.

UserData Post Format NDEF

4. Now, navigate to a website in iScanBrowser that accepts text input. For this example, we used

5. Scan the tag that you wrote the NDEF data record to in the previous section. read NDEF record RS4