A major challenge in wide deployment of smart wireless devices, using different technologies and sharing the same 2.4 GHz spectrum, is to achieve coexistence across multiple technologies. The IEEE 802.11 (WLAN) and the IEEE 802.15.4e TSCH (WSN) where designed with different goals in mind and both play important roles for respective applications. However, they cause mutual interference and degraded performance while operating in the same space. To improve this situation we propose an approach to enable a cooperative control which type of network is transmitting at given time, frequency and place.We recognize that Time-Slotted Channel Hopping (TSCH) based sensor network is expected to occupy only small share of time, and that the nodes are by design tightly synchronized. We develop mechanism enabling over-the-air synchronization of the Wi-Fi network to the TSCH based sensor network. Finally, we show that Wi-Fi network can avoid transmitting in the "collision periods". We provide full design and show prototype implementation based on the Commercial off-the-shelf (COTS) devices. Our solution does not require changes in any of the standards.Index Terms-Wireless LAN , Wireless sensor networks, Heterogeneous networks, Cooperative communication • A single Wi-Fi basic service set working in the infrastructure mode i.e., consisting of one Access Point (AP) and multiple Stations. Wi-Fi devices under consideration are using COTS hardware with the standard spectrum sensing 978-1-5090-0223-8