Low Power WiFi Module User Manual V1.3
http://www.tcp232.net
Jinan USR IOT Technology Limited.
Page 15 of 59
1.3. Typical Application
1.3.1. Hardware Typical Application
Figure 8. USR-WIFI232-G Hardware Typical Application
Notes
：
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.
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 n Link function not required, can leave this pin open.
nReady- Module boot up ready signal. Output. Logics “0” effective.
The module will output “0” after normal boot up. This signal used to judge if module finish boot up and
ready for application or working at normal mode. If nReady function not required, can leave this pin
open.
nReload- Module restore to factory default configuration.Input. Logics “0” effective.
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, we still suggest 50K~100K ohm pull up added outside the module.
Sleep-RQ- Module Pin Sleep Control. Input.
