Ultra high frequency RFID handheld terminal reading test demo
1, DEMO Overall Description
This demo is developed based on ultra-high frequency UHF RFID (840-960MHz) handheld terminals, realizing core functions such as tag reading, multi tag inventory, card reading parameter configuration, data reporting, and log recording. It is compatible with HT550 and supports Android system handheld devices (99% of industrial RFID handheld devices on the market are Android).
2, Core Function List
1. Single tag single read (EPC, TID, user area data)
2. Batch multi label inventory (anti-collision reading, deduplication)
3. RF parameter configuration: power, frequency point, read rate, read card duration
4. Real time display, reading count, and success rate statistics of tag data
5. Read logs, save locally, and clear logs
6. Start stop card reading, buzzer/vibration prompt (feedback of successful card reading)
4, Deployment&Testing Steps (Handheld Operation)
1. Preliminary preparation
1. Obtain the SDK from the handheld device manufacturer (jar/aar, development documentation, serial port address, default baud rate)
2. Prepare multiple UHF ultra-high frequency RFID tags (both passive adhesive tags and metal resistant tags are acceptable)
3. Android development environment: Android Studio
2. Engineering access
1. Import the manufacturer's RFID SDK into the project
2. Modify RFID_SERIAL-PORT and BAUD_DATE in the code to match the actual parameters of the device
3. Permission adaptation: Android 10+partition storage, Android 6.0+dynamic request for read and write permissions
3. Real machine testing process
1. Compile APK and install it on HT550 RFID handheld device
2. Open the app → click on start card reading
3. Place the UHF tag close to the handheld card reading antenna
4. The interface automatically displays EPC numbers, statistical quantities, and logs
5. Click to stop card reading to end the test, clear logs, and reset data
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5, Common Problems&Optimization Solutions
1. No response when reading the card
Check the serial port address and baud rate (the most common issue)
Check if the APP permissions and handheld device have enabled serial port permissions
Confirm that the tag is UHF ultra-high frequency (non low frequency/high frequency 13.56M)
2. Repeatedly reading the same label
Add HashSet deduplication in the code (demo implemented)
Reduce the reading rate and extend the tag dwell time for judgment
3. Close reading distance/poor sensitivity
O Increase RFID transmission power (recommended 18~24dBm, do not fully turn on 30dBm, power consumption is fast)
Check the antenna position, with the label facing the antenna area
4. Missing reads in multi tag reading
Enable module anti-collision algorithm (original SDK configuration)
Reduce inventory speed and read in batches
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6, Extended functionality (can be further developed)
Read tags TID, user data area, password area
Label writing data, locking, and destruction
Export card reading data to Excel/TXT
Upload tag data online to the backend server
Press the button to trigger card reading (physical scanning key on the handheld device)
