Esp8266 arduino example code3/13/2024 Connect to it using the password from the sketch, open a new browser window and type in the address bar. You should see a new Wi-Fi network, called “ESP8266” (assuming you left the defaults in the sketch above). Now open the Wi-Fi settings of your phone, or PC. You should see the following output: Configuring access point. Load the sketch, open the serial monitor and restart your NodeMCU module. ESP8266 Web Server example connections with the larger variant of the NodeMCU board There is also a connection from the NodeMCU pin A0 (ESP8266 ADC0) to the point between the fixed pull-down resistor and the variable photocell resistor. One leg of the photocell is connected to 3.3v and the other one to ground trough a fixed 10k Ohm (or higher) resistor. The LED is connected to NodeMCU pin D1 (ESP8266 GPIO5) through a 1k resistor. As in the previous examples, I am using the Arduino IDE to program the ESP8266 board. A HTML page hosted on the web-server displays analog data from a photocell and allows you to control remotely a LED via Wi-Fi from a web-browser on your phone or PC. In the sketch below the NodeMCU development board creates a Wi-Fi access point and starts a web-server. After testing the basic Wi-Fi connectivity options of the ESP8266 it is now time to explore some of the more interesting features of the chip.
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