6
2.2 Wifi connection status indicator pin
GPIO58 pin is used as the indicator pin of the module’s wifi connection status in sta mode.
When the module's wifi is connected to the router, GPIO58 will output a high level, otherwise will
output low level, and other modes will output low level.
2.3 Socket connection status indicator pin
The GPIO59 pin is used as the indicator pin of the module socket's connection status. When the
socket connection is successful, the GPIO outputs a high level, otherwise outputs low level.
2.4 One-click distribution mode
For the IOT wifi module, based on cost and performance considerations, there is no touch
screen interactive interface like a mobile phone. Users can see the ap list on the mobile phone and
click the password to connect to the network. What should I do? One-click configuration is the wifi
module in promiscuous mode (can capture all 802.11 frames in the air), APP sends the SSID and
password to the wifi module through UDP broadcast or multicast through certain encoding rules, the
module parses out, and then connects to the router. Install the Android app HLK-TCPdemo, then
select Configure Networking, select the elian mode, then select V5, input the password, click to open
the configuration and start the configuration. When the distribution network is successful, the
module will change from double flash to quick flash, indicating network successful connected.
Figure 4 One-click distribution network
