This article presents results of Internet of things network modeling as an ad hoc network. The main attention is paid to the features of the functioning of such a network in high density conditions, up to 1 device per square meter. The paper presents the results of evaluations of the basic operating conditions, namely, the level of interference from neighboring network nodes and the signal-to-noise ratio. The results obtained show that such a network can remain connected, but construction of relatively long routes is required. The developed models make it possible to express the dependence of the noise level and signal-to-noise ratio on the network density, produced traffic, and transmitter power. © Springer Nature Switzerland AG 2020.