Table 6.

Most utilized communication technologies in IoT crop irrigation systems.

Technology	References
Ethernet	[52,62,72,99,117,131,138,139,146,152,164]
GSM	[35,36,44,48,51,57,61,64,72,73,79,85,90,91,92,103,112,129,153,157,185,186,187,188,189]
Wi-Fi	[28,34,41,43,46,47,50,51,52,53,56,59,60,64,65,66,69,70,71,77,82,84,88,94,95,111,112,116,117,119,120,123,125,126,127,128,129,132,134,135,139,143,151,152,153,154,156,157,158,160,163,165,166,168,169,173,182,187,190,191,192,193,194]
ZigBee	[5,32,39,42,63,65,66,67,93,119,120,121,122,123,128,133,137,144,151,157,175,185,191]
Bluetooth	[46,53,81,118,129,132,134,156,174,181,195,196]
LoRa	[14,31,78,95,142,144,145,149,157,196,197]
GPRS	[44,45,67,73,79,98,101,122,137,157,161,171,179,186,190]
MQTT	[47,75,86,113,114,160,175,176]
4G	[14,45,78,138,141,145,152]
6LoWPAN	[75,147]
IEEE 802.15.4	[73,102]