🌤️ ESP32 + BMP180 Weather Logger with InfluxDB & Grafana

This project reads temperature, pressure, and altitude from a BMP180 sensor using an ESP32, and sends the data to InfluxDB via Wi-Fi. The data is then visualized in Grafana in real time.

📷 Overview

• Sensor: BMP180
• Microcontroller: ESP32
• Database: InfluxDB 2.x
• Visualization: Grafana

🔧 How It Works

1. ESP32 connects to Wi-Fi.
2. Reads sensor data (temperature, pressure, and altitude) from the BMP180.
3. Formats the data using InfluxDB Line Protocol.
4. Sends it via HTTP POST to your local InfluxDB instance.
5. Grafana reads the data from InfluxDB and visualizes it in real time.

🧰 Hardware Setup

• ESP32
  • SDA: GPIO 21
  • SCL: GPIO 22
• BMP180 Sensor
  • Connect to ESP32 I2C pins
• Make sure your ESP32 board is properly configured in Arduino IDE.

📸 Screenshots

📦 Libraries Used

Install these libraries via the Arduino Library Manager:

• WiFi.h
• HTTPClient.h
• Wire.h
• Adafruit Sensor
• Adafruit BMP085 (for BMP180)

🔗 InfluxDB Setup

Make sure you have InfluxDB running and set up:

1. Create a bucket: weather-data
2. Create an organization: dot
3. Generate an API Token with write access
4. Replace the following placeholders in the sketch:
   • WIFI_NAME
   • WIFI_PASSWORD
   • LAPTOP_IP (your computer’s IP running InfluxDB)
   • iNFLUX_DB_TOKEN

🖥️ Grafana Dashboard

1. Connect Grafana to your InfluxDB 2.x instance.
2. Create a dashboard using the weather-data bucket.
3. Use queries like:

from(bucket: "weather-data")
  |> range(start: -1h)
  |> filter(fn: (r) => r._measurement == "weather")