SENA ProBee-ZE20S-SEME - Manual (Page 38)

ProBee-ZE20S-SExx User Guide Rev 1.8 38
ATS51=n, where n is poll timeout in seconds and the default is 60.
This value is for a parent node. If a sleepy end-device does not send a poll request to its parent
coordinator or router within the poll timeout, the sleepy end-device is removed from the child table.
Unlike the non-sleepy end-device, sleepy end-device does not use S56 as the poll period. Instead, it uses
S53 as the sleep duration which works similar to the poll period, except it goes to sleep mode.
ATS53=n, where n is sleep duration in quarter seconds and the default is 8.
The ZE20S sleeps for sleep duration and turns off radio.
ATS52=n, where n is poll period in milliseconds and the default is 100.
Sleepy end-device wakes up from the sleep mode if S53 timer expires or GPIO0 interrupt is generated or
serial data is received. Once the sleepy end-device wakes up, it polls the parent node at poll period
defined by S52 until it goes to sleep mode again. Since the sleepy end-device exchanges data with the
parent node only by polling, S52 poll period is usually configured as around 100 ms.
ATS54=n, where n is standby timeout in seconds and the default is 5.
If there is no RF data or serial data for S54 seconds, the sleepy end-device goes to sleep mode again. If
any serial or RF data is sent or received, the timer will reset and the sleepy end-device waits for another
S54 seconds before it goes to sleep mode again.
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.