Chapter 13 WiFi Working Modes ============================= In this chapter, we'll focus on the WiFi infrastructure for ESP32-S3 WROOM. ESP32-S3 WROOM has 3 different WiFi operating modes: station mode, AP mode and AP+station mode. All WiFi programming projects must be configured with WiFi operating mode before using WiFi, otherwise WiFi cannot be used. Project 13.1 Station mode -------------------------------- Component List ^^^^^^^^^^^^^^^ - ESP32-S3-WROOM x1 - Type C USB Cable x1 Connect ^^^^^^^^^^^^ Connect ESP32-S3 to the computer using the USB cable. .. image:: img/0/connect1.png Code ^^^^^^^ Move the program folder “Basic_Starter_Kit_for_ESP32_S3/Python/Python_C odes” to disk(D) in advance with the path of “D:/Micropython_Codes”. **13.1_Station_mode** .. image:: img/software/20.1.png Because the names and passwords of routers in various places are different, before the Code runs, users need to enter the correct router’s name and password in the box as shown in the illustration above. After making sure the router name and password are entered correctly, compile and upload codes to ESP32S3, wait for ESP32-S3 to connect to your router and print the IP address assigned by the router to ESP32-S3 in “Shell”. .. image:: img/software/20.1-1.png The following is the program code: .. code-block:: python import time import network ssidRouter = 'xxxxxxxx' #Enter the router name passwordRouter = 'xxxxxxxx' #Enter the router password def STA_Setup(ssidRouter,passwordRouter): print("Setup start") sta_if = network.WLAN(network.STA_IF) if not sta_if.isconnected(): print('connecting to',ssidRouter) sta_if.active(True) sta_if.connect(ssidRouter,passwordRouter) while not sta_if.isconnected(): pass print('Connected, IP address:', sta_if.ifconfig()) print("Setup End") try: STA_Setup(ssidRouter,passwordRouter) except: sta_if.disconnect() Project 13.2 AP mode ------------------------ Component List & Circuit are the same as in Project 13.1. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Circuit ^^^^^^^ Connect ESP32-S3 to the computer using the USB cable. .. image:: img/0/connect1.png Code ^^^^^^^ Move the program folder “Basic_Starter_Kit_for_ESP32_S3/Python/Python_C odes” to disk(D) in advance with the path of “D:/Micropython_Codes”. Open “Thonny”, click “This computer” >> “D:” >> “Micropython_Codes” >> “13.2_AP_mod e”. and double click “AP_mode.py”. **13.2_AP_mode** .. image:: img/software/20.2.png Before the Code runs, you can make any changes to the AP name and password for ESP32-S3 in the box as shown in the illustration above. Of course, you can leave it alone by default. Click “Run current script”, open the AP function of ESP32-S3 and print the access point information. .. image:: img/software/20.2-1.png Turn on the WiFi scanning function of your phone, and you can see the ssid_AP on ESP32S3, which is called "WiFi_Name" in this Code. You can enter the password "12345678" to connect it or change its AP name and password by modifying Code. .. image:: img/software/20.2-2.jpg The following is the program code: .. code-block:: python import network import time def setup_secure_ap(): ssid = "Your_AP" password = "12345678" # Password must be at least 8 characters ap = network.WLAN(network.AP_IF) ap.active(False) # First, turn off the AP to ensure clearing any previous settings time.sleep(1) ap.active(True) # Configure AP with WPA2 encryption ap.config(essid=ssid, password=password, authmode=network.AUTH_WPA2_PSK) print("Setting up encrypted AP...") # Wait for AP activation for _ in range(10): # Wait for up to 10 seconds if ap.active(): print("AP setup successful") print("SSID:", ssid) print("Password:", password) print("IP address:", ap.ifconfig()[0]) return True time.sleep(1) print("AP setup failed") return False try: if setup_secure_ap(): print("AP is up and running. You should now see an encrypted Wi-Fi network.") else: print("Unable to set up AP. Please check your hardware and firmware.") except Exception as e: print("An error occurred:", str(e)) print("Program ended") Project 13.3 AP+Station mode -------------------------------- Component List & Circuit ^^^^^^^^^^^^^^^^^^^^^^^^^^ Component List & Circuit are the same as in Project 23.1. .. image:: img/0/connect1.png Code ^^^^^^ Move the program folder “Basic_Starter_Kit_for_ESP32_S3/Python/Python_C odes” to disk(D) in advance with the path of “D:/Micropython_Codes”. Open “Thonny”, click “This computer” >> “D:” >> “Micropython_Codes” >> “13.3_AP+ST A_mode”and double click “AP+STA_mode.py”. **13.3_AP+STA_mode** .. image:: img/software/20.3.png It is analogous to Project 13.1 and Project 13.2. Before running the Code, you need to modify ssidRouter, passwordRouter, ssidAP and passwordAP shown in the box of the illustration above. After making sure that the code is modified correctly, click “Run current script” and the “Shell” will display as follows: .. image:: img/software/20.3-1.png Turn on the WiFi scanning function of your phone, and you can see the ssidAP on ESP32-S3. .. image:: img/software/20.3-2.jpg The following is the program code: .. code-block:: python import network import socket import time import struct import binascii ssidRouter = '********' #Enter the router name passwordRouter = '********' #Enter the router password ssidAP = 'WiFi_Name'#Enter the AP name passwordAP = '12345678' #Enter the AP password local_IP = '192.168.4.150' gateway = '192.168.4.1' subnet = '255.255.255.0' dns = '8.8.8.8' sta_if = network.WLAN(network.STA_IF) ap_if = network.WLAN(network.AP_IF) def STA_Setup(ssidRouter,passwordRouter): print("Setting soft-STA ... ") if not sta_if.isconnected(): print('connecting to',ssidRouter) sta_if.active(True) sta_if.connect(ssidRouter,passwordRouter) while not sta_if.isconnected(): pass print('Connected, IP address:', sta_if.ifconfig()) print("Setup End") def AP_Setup(ssidAP,passwordAP): ap_if.ifconfig([local_IP,gateway,subnet,dns]) print("Setting soft-AP ... ") ap_if.config(essid=ssidAP,authmode=network.AUTH_WPA_WPA2_PSK, password=passwordAP) ap_if.active(True) print('Success, IP address:', ap_if.ifconfig()) print("Setup End\n") try: AP_Setup(ssidAP,passwordAP) STA_Setup(ssidRouter,passwordRouter) except: sta_if.disconnect() ap_if.disconnect()