A Modbus slave-device running in RTU mode (at the moment, TapNPass/TapNLink do not support ASCII mode).
A cable to connect TapNPass to your Modbus slave device.
An Android mobile device, with Android version 6.0 or later, with BLE and NFC connections enabled (the demo can work just using BLE, but it is more secure to use NFC for pairing).
A Windows based computer with IoTize Studio configuration software, installation procedure available here.
IoTize Tap Manager App (install from Google Play Store), which is used:
to relay the configuration from IoTize Studio to TapNPass.
to run the Web monitoring app (static site), from its internal 'viewer'.