Wifi Module - ESP8266 Initializing

This project will test the Wifi Module Connection to the available access point in surrounding. Follow the steps below to establish a connection to the available AP.

Hardware Connection

• Do the connection as shown in the diagram.

• At initial stage DON'T Connect Arduino RST to GND

• SW1 Open (NC) & SW2 Open (NC)

• Connect Vss and ch_pd of ESP8266 to 3.3V of Arduino. You can use 5V as Vss but many forums suggested to connect to 3.3V. I connected to 5V and its functioning well.

Software Setup

• Open Arduino IDE

• Setup Arduino Board and COM port

• Send Empty program (Refer program code)

• Compile the program

Send AT Command

• Connect Rx(ESP8266) to Rx (pin0) of Arduino

• Connect Tx(ESP8266) to Tx (pin1) of Arduino

• Connect Arduino RST to GND – To disable the Arduino

• Press SW2 to reset the ESP8266

• Open Serial Monitor in IDE

• Set "Both NL&CR" and Baud Rate = 115200 baud

• Type AT and press enter

If you receive "OK" message then all functioning well. If not please reacheck all connection.

AT
OK

Check the ESP8266 version

• Type AT+GMR, you will receive the following message

AT+GMR
AT version:1.2.0.0(Jul  1 2016 20:04:45)
SDK version:1.5.4.1(39cb9a32)
v1.0.0
Mar 11 2018 18:27:31
OK

Check AT Mode

• To check the AT mode, type AT+CWMODE?

+CWMODE:2
OK

• If the mode is not "1", then change it mode 1 by typing AT+CWMODE=1. Then check again the AT Mode.

• Mode 1 : Station

• Mode 2: Soft Access Point (AP)

• Mode 3: Station + Soft AP

AT+CWMODE=1
OK

Check available APs

• Now check the available network around you by typing AT+CWLAP

AT+CWLAP
+CWLAP:(4,"xxxx",-89,"xx:xx:xx:xx:xx",x,xx,0)
+CWLAP:(3,"xxxxxxxxz",-69,"xx:xx:xx:xx:xx",x,xx,0)
+CWLAP:(3,"xxxxxxxxx",-72,"xx:xx:xx:xx:xx",x,xx,0)
+CWLAP:(3,"xxxxxxxxxxxx",-73,"xx:xx:xx:xx:xx",x,xx,0)
+CWLAP:(3,"xxxxxxxx",-85,"xx:xx:xx:xx:xx",x,xx,0)
+CWLAP:(4,"xxxxxxxxx",-51,"xx:xx:xx:xx:xx",x,xx,0)
+CWLAP:(4,"xxxxxxxx",-85,"xx:xx:xx:xx:xx",x,xx,0)
+CWLAP:(3,"xxxxxxxxx",-80,"xx:xx:xx:xx:xx",x,xx,0)
+CWLAP:(3,"xxxxxxxxx",-86,"xx:xx:xx:xx:xx",x,xx,0)