Nano_Nrf24_AHT10_TX-RX-Mqtt

Wireless Environmental Monitoring System with nRF24L01+

This project is a lightweight, battery-friendly wireless monitoring system using Arduino, AHT10, and nRF24L01+ modules. It includes a single transmitter and two types of receivers:

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🛰️ Components

1. Transmitter

• Hardware: Arduino Pro Mini 3.3V 8MHz + AHT10 + nRF24L01+
• Function: Reads temperature, humidity, and battery voltage. Sends packets over nRF24.
• Power Efficient: Designed for long-term battery operation.

2. Receiver with OLED

• Hardware: Arduino Nano + nRF24L01+ + OLED 128x32
• Function: Receives and displays data in real-time:
  • Temperature (°C)
  • Humidity (%)
  • Battery Voltage (V)
  • Message Count & Timeout Since Last Message

3. Receiver with MQTT

• Hardware: ESP8266 (e.g. Wemos D1 Mini) + nRF24L01+
• Function: Receives packets and publishes them to an MQTT broker in JSON format for Home Assistant or similar platforms.

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📡 Communication

All nodes use nRF24L01+ and a shared address (pipe 0) for data transmission.

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🏠 Use Case Examples

• Remote temperature & humidity sensing
• Smart home monitoring with MQTT
• Data logging for environmental analysis

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📁 Code Files

• TX_ProMini_AHT10.ino: Battery-powered transmitter
• RX_Nano_OLED.ino: Arduino Nano receiver with OLED
• RX_ESP8266_MQTT.ino: ESP8266 receiver publishing to MQTT

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🛠️ Dependencies

• RF24 by TMRh20
• Adafruit AHT10 / Wire
• Adafruit SSD1306 / Adafruit GFX
• PubSubClient (for ESP8266 MQTT)

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🌍 License

Public Domain / CC0. Use freely for any purpose.

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Created by AmirY — June 2025