https://github.com/asathiskumar98-byte/esp8266-dht22-temperature-humidity-sensor-micropython

This project shows how to interface a **DHT22 (AM2302)** sensor with an **ESP8266** using **MicroPython**. It reads **temperature** and **humidity** values every 2 seconds and displays them on the **Thonny IDE console**.
https://github.com/asathiskumar98-byte/esp8266-dht22-temperature-humidity-sensor-micropython

dht22-sensor embedded-systems esp8266 esp8266-projects humidity-monitoring micropython micropython-esp8266 temperature-monitoring thonny-ide

Last synced: about 2 months ago
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This project shows how to interface a **DHT22 (AM2302)** sensor with an **ESP8266** using **MicroPython**. It reads **temperature** and **humidity** values every 2 seconds and displays them on the **Thonny IDE console**.

• Host: GitHub
• URL: https://github.com/asathiskumar98-byte/esp8266-dht22-temperature-humidity-sensor-micropython
• Owner: asathiskumar98-byte
• Created: 2025-10-29T03:37:43.000Z (7 months ago)
• Default Branch: main
• Last Pushed: 2025-10-29T03:40:32.000Z (7 months ago)
• Last Synced: 2025-10-29T05:39:18.348Z (7 months ago)
• Topics: dht22-sensor, embedded-systems, esp8266, esp8266-projects, humidity-monitoring, micropython, micropython-esp8266, temperature-monitoring, thonny-ide
• Language: Python
• Homepage:
• Size: 2.93 KB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# 🌡️ ESP8266 DHT22 Temperature & Humidity Sensor — MicroPython

## 🧠 Overview

This project shows how to interface a **DHT22 (AM2302)** sensor with an **ESP8266** using **MicroPython**.  

It reads **temperature** and **humidity** values every 2 seconds and displays them on the **Thonny IDE console**.

---

## ⚙️ Hardware Setup

| Component | ESP8266 Pin | Description |

|------------|-------------|--------------|

| DHT22 (Data) | GPIO4 (D2) | Sensor data output |

| VCC | 3.3V | Power supply |

| GND | GND | Common ground |

🪛 **Connections:**

- DHT22 **VCC → 3.3V**

- DHT22 **GND → GND**

- DHT22 **Data → GPIO4 (D2)**  

- Add a **10kΩ pull-up resistor** between **VCC** and **Data** for stable readings.

---

## 🧩 Code

```python

# GPIO04 = D2 = Data of DHT22

import machine

import dht

import utime

dh = dht.DHT22(machine.Pin(4))

while True:

    dh.measure()

    utime.sleep_ms(2000)

    tem = dh.temperature()

    hum = dh.humidity()

    print('Humidity:', hum, 'TEMPERATURE:', tem)