N11
Hardware User Guide
Copyright © Neoway Technology Co., Ltd
13
Figure 3-5
Power-on timing
VBAT
ON/OFF
UART
3s
1.2s
In program design, use the unsolicited message
\r\nMODEM:STARTUP\r\n
to determine whether the
module is started or whether the module is reset properly after setting the baud rate.
Pay attention to the interface level exception between MCU and the module, especially the UART port,
might affect the power on procedure of the module. E.g. in the turn on procedure, IO port of MCU has not
completed the initialization and is in the output state, UTXD signal of the port (also the output pin) forced
to pull low or high, the module may not be able to turn on normally.
Power-Off Procedure
While the module is on, pull the ON/OFF pin to ground for at least 5
00 ms
and then release, the
module will try to detach to network and normally 2 seconds later it will shut down. Another approach
to turn off the module is using AT commands. For details, please refer to
Neoway_N11_AT_Commands_Manual
.
Figure 3-6
Power-off procedure
VBAT
ON/OFF
UART
2 s
500 ms
