Check NFC or BLE compatiblity of the meter. If the meter is not a NFC or BLE meter, it may be compatible with OTG cable.
2. Check NFC(not compatible with iPhones) or Bluetooth compatibility of the smartphone.
3. Check the version of the installed SmartLog app. (SmartLog may need to be updated.)
4. Check the OS version of the smartphone. (OS may need to be updated.)
→ If the problem persists, contact the Customer Service Center at smartlog@i-sens.com.