{"id":3504,"date":"2025-03-26T15:00:53","date_gmt":"2025-03-26T15:00:53","guid":{"rendered":"https:\/\/iotthinghub.com\/?p=3504"},"modified":"2025-03-26T15:49:04","modified_gmt":"2025-03-26T15:49:04","slug":"esp8266-as-station-mode-connected-to-internet","status":"publish","type":"post","link":"https:\/\/iotthinghub.com\/?p=3504","title":{"rendered":"ESP8266 as Station Mode: Connected to Internet"},"content":{"rendered":"\n

In our previous article we discuss about Access Point Network, in this article we discuss about ESP8266 station mode. For connecting with your 2.4GHz router & basic command please see my WiFi Load Control<\/a> article. Setting the ESP8266 to Station Mode (STA) allows it to connect to an existing Wi-Fi network. This enables it to communicate with other devices, send data to the cloud, or host a web server.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Before starting please go through my previous articles for some basic knowledge of ESP8266 module. Before starting let\u2019s see some command mode that we need in this article.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Let\u2019s see the command parameters & there uses. Simple AT command return OK string with carriage return & new line. If we send ATE0 it will stop echo otherwise echo comes. Command AT+CWMODE define the mode of operations. In this article we use ESP8266 as a Station. The AT+CWLAP command will show the available networks for esp8266 access point. If it doesn\u2019t show your router name, please enable the 2.4GHz frequency bandwidth. Connect your router with AT+JAP command. Let\u2019s look at the program for setup-<\/p>\n\n\n

\nchar WIFI_NAME[] = "SSID";       \/\/ WiFi Name\nchar WIFI_PASS[]  = "Password";  \/\/ WiFi Password\nchar display[1023],wifi_send[200],RX_ST[1023],TX_ID[20];\nuint8_t rx_char;\nuint16_t count;\nextern UART_HandleTypeDef huart1;\n\/\/-------------- Rx Callback Function -----\nvoid HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)\n{\n  if(huart->Instance== USART1)\n  {\n    display[count++]=rx_char;\n    HAL_UART_Receive_IT(&huart1,&rx_char,1);\n  }\n}\nvoid ESP8266_Setup(void)\n{\n\tESP8266_TX("AT\\r\\n","OK",4000);                \/\/ Device Checking\n\tESP8266_TX("ATE0\\r\\n","OK",4000);              \/\/ ECHO OFF\n\tESP8266_TX("AT+CWMODE=1\\r\\n","OK",4000);       \/\/ Station Mode\n\tsprintf(wifi_send,"AT+CWJAP=\\"%s\\",\\"%s\\"\\r\\n",WIFI_NAME,WIFI_PASS);\n\tESP8266_TX(wifi_send,"GOT IP",8000);           \/\/ Connected to Internet\n\tmemset (display, '\\0',1023);                   \/\/ clear the buffer\n\tcount=0;\n}\nvoid ESP8266_TX(char *b_send,char *return_string,uint16_t delay_time)\n{\n\tchar ESP8266_TX[10];\n\tsprintf(ESP8266_TX,"%s",return_string);\n            sprintf(wifi_send,"%s",b_send);\n\tHAL_UART_Transmit(&huart1,(uint8_t*)wifi_send,strlen(wifi_send),1000);\n\twhile(1)\n\t{\n\t\tsprintf(RX_ST,"%s",display);\n\t\tif(strstr(RX_ST,ESP8266_TX)) break;\n\t}\n\tHAL_Delay(delay_time);\n\tmemset (display, '\\0',1023);   \/\/ clear the buffer\n\tmemset (wifi_send,'\\0',200);   \/\/ clear the buffer\n\tmemset (RX_ST, '\\0',1023);     \/\/ clear the buffer\n\tcount=0;\n}\n<\/pre><\/div>\n\n\n
After setup the next step is to collect data from webpage & display it on screen. Here I use UART1 for ESP8266 & I2C2 for display purpose. In this article we get the data from following 2 website-<\/p>\n\n\n\n