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Other examples of low power nodes include battery operated versions of the smart hazard detectors 104. These smart hazard detectors 104 are often located in an area without access to constant and reliable power and may include any number and type of sensors, such as smoke/fire/heat sensors e. g. , thermal radiation sensors, carbon monoxide/dioxide sensors, occupancy/motion sensors, ambient light sensors, ambient temperature sensors, humidity sensors, and the like. Furthermore, smart hazard detectors 104 may send messages that correspond to each of the respective sensors to the other devices and/or the server system 164, such as by using the mesh network as described above. As explained above with reference to FIG.fall detection medical alert systems
11, are able to switch to a relatively low power communication protocol, such as IEEE 802. 15. 4, to receive these messages, translate the messages to other communication protocols, and send the translated messages to other spokesman nodes and/or the server system 164 using, e. g. , the relatively high power communication protocol. Thus, the low powered nodes using low power communication protocols are able to send and/or receive messages across the entire smart home network 202, as well as over the Internet 162 to the server system 164. In some implementations, the mesh network enables the server system 164 to regularly receive data from most or all of the smart devices in the home, make inferences based on the data, facilitate state synchronization across devices within and outside of the smart home network 202, and send commands to one or more of the smart devices to perform tasks in the smart home environment. As described, the spokesman nodes and some of the low powered nodes are capable of “listening. ” Accordingly, users, other devices, and/or the server system 164 may communicate control commands to the low powered nodes. For example, a user may use the electronic device 166 e. g.