Challenges in Integration of Heterogeneous Internet of Things

Table 2

Search strings.

Sources	Search string	Context
Google Scholar	(“Heterogeneous Internet of Things”) AND (“issues OR challenges”)	IoT heterogeneity
IEEE Explore	“Heterogeneous” AND (“IoT” OR “Internet of Things”) AND “challenges”
ScienceDirect	(“IoT” OR “Internet of Things”) AND (“heterogenous”) AND (“challenges”)
ACM	(“IoT”) AND (“heterogenous”) AND (“challenges”)
SpringerLink	(“IoT”) AND (“heterogeneity”) AND (“challenges”)