Essentials for Integration Testing – Bluetooth Low Energy

Essentials for Integration Testing – Bluetooth Low Energy

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IoT has been around for a while, but the current detonation in interest is due to the massive price drops of sensors combined with near ubiquitous connectivity. As per the recent report by IDC, Worldwide technology spending on the Internet of Things to reach $1.2T in 2022, attaining a CAGR of 13.6% over the 2017-2022 forecast period. Bluetooth technology is widely used in IoT in various smart applications for connecting over short distances (up to 100m) using short-wavelength radio transmissions in the unlicensed industrial, scientific, and medical (ISM) band from 2400.0 to 2483.5 MHz.

Bluetooth device communicate from one device to another in multiple modes:

  • Unicast: Source sends and receives messages to multiple destinations establishing one-to-one device communication
  • Broadcast: Source send messages to multiple destinations establishing one-to-many device communication
  • Multicast (Mesh): Multiple Source and destinations establishing many-to-many device communication

BLE is marketed by Bluetooth Special Interest Group (SIG). Bluetooth SIG manages the certification process which needs to be followed by any Product using Bluetooth Wireless Technology. All these products must be Bluetooth SIG qualified and satisfy the requirements of the Bluetooth license agreements and specifications. SIG owns the logo as shown below and word “Bluetooth”:

Further process for qualifying Bluetooth enabled product can be followed at below link on Bluetooth website:

Bluetooth Protocol and Tests

Integration level tests for BLE involves the verification of advertisement data, handshake process (initiate communication and negotiate transfer parameters),