Z_WaveRelative

1. Introduce

• a wireless home automation protocol;
• an alliance of companies;
• all z-ware hardware uses sigma chips;
• z-wave has been a closed protocol;
  • devices and protocol managed by sigma and z-wave alliance;
  • certified devices undergo a certification scheme to ensure compatibility;
  • open source projects needed to rely on reverse engineering the protocol;
• approx 600 companies and 2200 certified devices;
• introduce in 2015 and backward compatible with the original standard;
• improved devices with lower battery comsumption, coupled with improved protocol functionality;
  • data rate 100kb/s;
  • lower power consumption for better battery life;

2. z-wave protocol features

• two way communications:
  • guarantees delivery of data or notification of failure;
• mesh networking:
  • extends the network outside the immediate range of the controller;
• immediate status updates:
  • reduced latency over a polled system;
• large number of devices on a network
  • supports 232 physical devices;
• high security option

3. routing

• z-wave uses a source routing mesh network
  • the sender( controller ) is responsible for defining the routes;
  • up to four routers can be traversed between the source and destination;
• the controller uses “explorer frames” to derive a route to the destination;