SENA ProBee-ZE20S-SEME - Manual (Page 37)

ProBee-ZE20S-SExx User Guide Rev 1.8 37
The ZE20S poll interval can be configured by setting the S-registers using the AT commands as below.
ATS51=n, where n is poll timeout in seconds and the default is 60.
This value is for a parent node. If an end-device does not send a poll request to its parent coordinator or
router within the poll timeout, the end-device is removed from the child table.
ATS56=n, where n is poll period in seconds and the default is 5.
End-device polls the parent node at poll period defined by S56 periodically. It is for the connection to the
parent node and data transmission with other nodes in the network.
ATS55=n, where n is rejoin timeout and the default is 10.
When the connection to the parent node is broken for S55 in seconds, the child node tries to rejoin the
current network.
Even though the end-device needs to poll the parent node continuously, it does not go into the sleep
mode and it can send and receive messages any time unlike the sleepy end-device.
3.7 Setting up ZE20S as a Sleepy End-Device
A sleepy end-device can turn off radio to save power. To configure the ZE20S as a ZigBee sleepy end-
device, please follow the steps below.
 Configure the CBKE Data Token
 Optionally, configure the Install Code
 Configure the ZE20S node as a sleepy end-device.
 Optionally, select the channel mask. Otherwise, the ZE20S will use the default channel mask.
 Optionally, set up the PAN ID and/or the extended PAN ID. Otherwise, the ZE20S will scan and
join the ZigBee network found automatically.
 Configure the settings for sleep interval.
Please refer to the section 3.5 Setting up ZE20S as a Router for the AT commands regarding the CBKE
Data Token configuration, the Install Code configuration, the node type selection, the channel mask
configuration and the PAN ID/Extended PAN ID configuration.
One of the unique features of the ZigBee device is its extreme low power consumption which is mainly
achieved by its efficient sleep and wake-up mechanism. While ZigBee coordinator and routers are
required to be in operation all the time, ZigBee sleepy end-devices can be configured to be in the sleep
mode most of the time and only wake up at pre-configured time interval for data transmission before it
goes into the sleep mode again. The ZE20S sleep interval can be configured by setting the S-registers
using the AT commands as below.