Table 3 Wireless communication technology used

Between sensors and controller

Zigbee

Vinod and Sushama (2016), Niel et al. (2016), Theofanis et al. (2014), Peng et al. (2009), Jayti and Jignesh (2016), Poonam et al., 2016, Xin et al. (2011), Pandian and Mala (2015), Liang (2014), Christie et al. (2014), Offiong et al. (2014), Anthony et al. (2014), Li et al. (2013)

UART

Tomoaki et al. (2016), Wei et al. (2012), Vijayakumar and Ramya (2015), Thinagaran et al. (2015), Mitar et al. (2016), Sathish et al. (2016)

Between controller and application

GSM/GPRS

Peng et al. (2009), Xin et al. (2011), Liang (2014), Wei et al. (2012), Francesco et al. (2015), Anthony et al. (2014), Tomoaki et al. (2016)

Ethernet LAN

Theofanis et al. (2014)

IoT (using external WiFi Module)

Vijayakumar and Ramya (2015), Thinagaran et al. (2015), Mitar et al. (2016), Jayti and Jignesh (2016), Poonam et al., 2016, Sathish et al. (2016)

IoT (using inbuilt WiFi Module)

Proposed

LCD, Alarm, Actuators.

Vinod and Sushama (2016), Niel et al. (2016), Li et al. (2013)