If the range of your Zigbee coordinator is a bit disappointing, some sensors will be disconnected from your Zigbee network. Annoying, because you cannot receive information from those sensors. You can improve and enlarge the mesh through a device powered by 230v, such as a lamp. They also act as a Zigbee router and increase your reach and strengthen your mesh network, but it can also be done differently. With some cheap hardware and some free software.
To have a stable and reliable network of sensors and lamps, more and more people are using the affordable alternative to Zwave, Zigbee. By linking a Zigbee Gateway to domoticz you can easily use multiple systems from multiple manufacturers at the same time. Consider, for example, the Ikea Tradfri lamps, Philips Hue or Xiaomi Aqara sensors. You no longer need the expensive Bridges and gateways! In this blog post you can read how you can use the Zigate USB TTL stick in combination with a Synology NAS and home automation software domoticz.