a bit off-topic, but Zigbee came up in a discussion with a friend recently when talking about adding wifi functionality to PLCs. he mentioned that Zigbee device

a bit off-topic, but Zigbee came up in a discussion with a friend recently when talking about adding wifi functionality to PLCs. he mentioned that Zigbee devices are pretty much unusable in existing Wifi deployments because they run over the same bands/frequencies. can you comment on this at all? thanks!