Low power WIFI module user manual
Jinan USR IOT Technology Limited
Page 17/72
nReset-
Module hardware reset signal. Input. Logics “0” effective.
There is pull-up resister internal and no external pull-up required. When
module power up or some issue happened, MCU need assert nRST signal “0” at
least 10ms, then set” 1” to keep module fully reset.
nReload
- Module restore to factory default configuration.Input. Logics “0”
effective.
(This pin is recommend to connect to button, is used to enter wireless
upgrade mode)
User can de-assert nReload signal “0” more than 3s through button or MCU
pin, then release, module will restore to factory default configuration and
re-start boot up process.. If nReload function not required, can leave this
pin open.
UART0_TXD/RXD
- UART port data transmit and receive signal.
PWM-n-
PWM control signal output. It can also be configured as GPIO output.
“AT+LPTIO=on” command
configure PWM_1 pin as nLink
、
PWM_2 pin as nReady
、
PWM_3 as WPS function.
nReset-
Module hardware reset signal. Input. Logics “0” effective.
There is pull-up resister internal and no external pull-up required. When
module power up or some issue happened, MCU need assert nRST signal “0” at
least 10ms, then set” 1” to keep module fully reset.
nLink-
Module WIFI connection status indication. Output.
(This pin is recommend to connect to LED, indicate status when the module
in wireless upgrade mode)
When module connects to AP (AP associated), this pin will output “0”. This
signal used to judge if module already at WiFi connection status. Thers is
pull-up resister internal and no external pull-up required. If nLink
function not required, can leave this pin open.
