9V Original HW High-Quality Battery (Pack of 25)

9V Original HW High-Quality Battery (Pack of 25) Documentation

Overview

The 9V Original HW High-Quality Battery is a reliable and efficient power source for various IoT projects. This battery pack consists of 25 high-quality 9V batteries, ideal for powering devices that require a stable and long-lasting power supply.

Specifications

Voltage: 9V
 Capacity: High-quality alkaline batteries
 Quantity: 25 batteries per pack
 Dimensions: Standard 9V battery size (48mm x 25mm x 15mm)

Usage Examples

### Example 1: Powering an Arduino Board

In this example, we will use the 9V battery to power an Arduino Uno board. The Arduino board is connected to a breadboard, and an LED is connected to digital pin 13.

Hardware Requirements

1 x Arduino Uno board
 1 x Breadboard
 1 x LED
 1 x 9V Original HW High-Quality Battery
 Jumper wires

Code
```c
const int ledPin = 13;  // LED connected to digital pin 13

void setup() {
  pinMode(ledPin, OUTPUT);
}

void loop() {
  digitalWrite(ledPin, HIGH);  // Turn the LED on
  delay(1000);               // Wait for 1 second
  digitalWrite(ledPin, LOW);  // Turn the LED off
  delay(1000);               // Wait for 1 second
}
```
Connect the 9V battery to the Arduino board's power input (VIN) using jumper wires. The Arduino board will regulate the 9V input to 5V for its internal components. The LED will blink on and off every second, demonstrating the reliable power supply from the 9V battery.

### Example 2: Powering a Wireless Sensor Node

In this example, we will use the 9V battery to power a wireless sensor node based on the ESP32 microcontroller. The sensor node will transmit temperature and humidity data to a remote server using Wi-Fi.

Hardware Requirements

1 x ESP32 microcontroller board
 1 x DHT11 temperature and humidity sensor
 1 x 9V Original HW High-Quality Battery
 Jumper wires
 Wi-Fi antenna (optional)

Code
```c
#include <WiFi.h>
#include <DHT.h>

const char ssid = "your_wifi_ssid";
const char password = "your_wifi_password";
const char serverUrl = "http://example.com/iot_data";

DHT dht(DHT11, 4);  // DHT11 sensor connected to digital pin 4

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");
  dht.begin();
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT11 sensor!");
  } else {
    WiFiClient client;
    HTTPClient http;
    http.begin(client, serverUrl);
    http.addHeader("Content-Type", "application/json");
    String payload = "{""temperature"": " + String(temperature) + ", ""humidity"": " + String(humidity) + "}";
    int httpResponseCode = http.POST(payload);
    http.end();
    delay(10000);  // Send data every 10 seconds
  }
}
```
Connect the 9V battery to the ESP32 board's power input (VIN) using jumper wires. The ESP32 board will regulate the 9V input to 3.3V for its internal components. The sensor node will transmit temperature and humidity data to the remote server every 10 seconds, demonstrating the reliable power supply from the 9V battery.

Note: Make sure to adjust the Wi-Fi credentials and server URL according to your specific setup.