User's Manual

HF-BL100-CU Low Energy Bluetooh（BLE 4.0）Module User Manual
Shanghai High Flying Electronics Technology Co., Ltd www.hi-flying.com - 40
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"AT:ERP\r\n" means invalid command, change failed
In order to enable user CPU have enough time wake up from sleep and ready to receive,
module provide a Latency (X) setting, set BCTS low level before sending data from UART, and
the data latency between BCTS to module TX is set by the parameter. Module can assure min
latency over “X” , the actual latency is T = ( X+Y ) ms ,and 500us<Y<1ms. The parameter can be
save after power off.
Figure 9. Module UART Output Data Latency Set Map
4.3.26. Save Parameter
Function：save the changed parameter( the save will stop BLE function and other interrupt,
after save, system will restore)
Effective time： immediately, save will stop BLE function and other interrupt, after save,
system will restore
Command：
"AT:SAVE"+<CR><LF>
APP command no need <CR><LF>
Feedback：
"AT:OK\r\n" means command correct
"AT:ERP\r\n" means invalid command, command failed
APP Command no need "\r\n"
4.3.27. Module Restore
Function：module restore, system software restore
Effective time： stop BLE function ,execute immediately