ESP01 ESP8266 Wireless Transceiver Module Documentation
The ESP01 ESP8266 Wireless Transceiver Module is a versatile and low-cost IoT component that enables Wi-Fi connectivity for a wide range of applications. It is based on the popular ESP8266 system-on-a-chip (SoC) and provides a compact and efficient solution for wireless communication.
Wi-Fi 2.4 GHz frequency band
Supports 802.11 b/g/n protocols
Built-in antenna
Low power consumption
Operating voltage: 2.2V to 3.6V
Serial communication interface (UART)
Programmable using Arduino IDE or Lua script
VCC: Power supply (2.2V to 3.6V)
GND: Ground
RX: Receive data (UART)
TX: Transmit data (UART)
RST: Reset
GPIO0: General-purpose input/output
GPIO2: General-purpose input/output
Example 1: Connecting to a Wi-Fi Network using Arduino IDE
This example demonstrates how to connect the ESP01 module to a Wi-Fi network using the Arduino IDE.
```c
#include <WiFi.h>
const char ssid = "your_wifi_ssid";
const char password = "your_wifi_password";
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
// Your code here
}
```
Example 2: Sending Data to a Server using Lua Script
This example demonstrates how to send data to a server using the Lua script on the ESP01 module.
```lua
-- Set up Wi-Fi connection
wifi.setmode(wifi.STATION)
wifi.sta.config("your_wifi_ssid", "your_wifi_password")
wifi.sta.connect()
-- Wait for Wi-Fi connection
while wifi.sta.status() ~= wifi.STA_GOTIP do
print("Connecting to Wi-Fi...")
tmr.delay(1000)
end
-- Send data to server
local conn = net.createConnection(net.TCP, 0)
conn:connect(80, "example.com")
conn:send("GET / HTTP/1.1
Host: example.com
")
conn:on("receive", function(conn, payload) print(payload) end)
```
Example 3: MQTT Client using Arduino IDE
This example demonstrates how to use the ESP01 module as an MQTT client using the Arduino IDE.
```c
#include <WiFi.h>
#include <PubSubClient.h>
const char ssid = "your_wifi_ssid";
const char password = "your_wifi_password";
const char mqttServer = "mqtt.example.com";
const char mqttTopic = "your_mqtt_topic";
WiFiClient espClient;
PubSubClient client(espClient);
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
client.setServer(mqttServer, 1883);
}
void loop() {
if (client.connect("ESP01Client")) {
client.publish(mqttTopic, "Hello from ESP01!");
Serial.println("Published message to MQTT topic");
} else {
Serial.println("Failed to connect to MQTT server");
}
delay(5000);
}
```
Note: In all examples, replace "your_wifi_ssid", "your_wifi_password", "your_mqtt_topic", and "example.com" with your actual Wi-Fi credentials, MQTT topic, and server URL.
