Connect to a Wi-Fi network as a client.
Connect to a Wi-Fi network as a client.
Act as a Wi-Fi access point, allowing other devices to connect to it.
| SoftAP + Station mode | Operate as both a Wi-Fi client and access point simultaneously. |
Key Features
Additional Features
Programming
| The ESP8266 12F can be programmed using various programming languages, including |
Applications
| The ESP8266 12F is suitable for various IoT applications, including |
Conclusion
The ESP8266 12F is a powerful and versatile IoT component that offers a perfect blend of performance, power efficiency, and affordability. Its integrated Wi-Fi capabilities, microcontroller, and peripherals make it an ideal choice for a wide range of IoT applications.
ESP8266 12F DocumentationOverviewThe ESP8266 12F is a low-cost, low-power system on a chip (SoC) with integrated Wi-Fi and microcontroller capabilities. It is widely used in Internet of Things (IoT) projects and applications due to its compact size, ease of use, and affordability.Technical SpecificationsMicrocontroller: 32-bit LX6 microprocessor
Flash Memory: 4MB
SRAM: 96KB
Wi-Fi: 802.11 b/g/n
Operating Frequency: 2.4 GHz
Interface: SPI, I2C, I2S, UART, ADC, DAC
Power Supply: 2.2V - 3.6V
Operating Temperature: -40C to 125CCode Examples### Example 1: Connecting to Wi-Fi and Publishing to MQTT BrokerThis example demonstrates how to connect the ESP8266 12F to a Wi-Fi network and publish a message to an MQTT broker using the PubSubClient library.```cpp
#include <WiFi.h>
#include <PubSubClient.h>// Wi-Fi credentials
const char ssid = "your_wifi_ssid";
const char password = "your_wifi_password";// MQTT broker credentials
const char mqttServer = "mqtt://your_mqtt_broker";
const char mqttTopic = "your_mqtt_topic";WiFiClient espClient;
PubSubClient client(espClient);void setup() {
Serial.begin(115200);// Connect to Wi-Fi
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to Wi-Fi...");
}
Serial.println("Connected to Wi-Fi");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());// Connect to MQTT broker
client.setServer(mqttServer, 1883);
while (!client.connected()) {
Serial.print("Connecting to MQTT broker...");
if (client.connect("ESP8266Client")) {
Serial.println("connected");
client.publish(mqttTopic, "Hello from ESP8266!");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
delay(5000);
}
}
}void loop() {
client.loop();
delay(1000);
}
```### Example 2: Reading Analog Input and Sending Data to a Web ServerThis example demonstrates how to read an analog input from a sensor connected to the ESP8266 12F and send the data to a web server using the HTTPClient library.```cpp
#include <WiFi.h>
#include <HTTPClient.h>// Wi-Fi credentials
const char ssid = "your_wifi_ssid";
const char password = "your_wifi_password";// Web server URL
const char serverUrl = "http://your_web_server.com/esp8266_data";WiFiClient espClient;
HTTPClient http;void setup() {
Serial.begin(115200);// Connect to Wi-Fi
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to Wi-Fi...");
}
Serial.println("Connected to Wi-Fi");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}void loop() {
int sensorValue = analogRead(A0);
float voltage = sensorValue (3.3 / 1023.0);
String postData = "sensor_value=" + String(voltage);http.begin(espClient, serverUrl);
http.addHeader("Content-Type", "application/x-www-form-urlencoded");int httpResponseCode = http.POST(postData);
if (httpResponseCode > 0) {
Serial.println("Data sent successfully!");
} else {
Serial.println("Error sending data:");
Serial.println(http.errorString(httpResponseCode));
}
http.end();delay(10000);
}
```Note: Make sure to replace the placeholders (e.g., `your_wifi_ssid`, `your_wifi_password`, `your_mqtt_broker`, `your_mqtt_topic`, `your_web_server.com`) with your actual credentials and server URLs.