https://github.com/desiFish/GPS-CLOCK-V1

A precision timepiece that syncs with satellites and monitors your environment!
https://github.com/desiFish/GPS-CLOCK-V1

128x64 arduino bh1750 bme280-sensor bmp280 buzzer digital-clock esp32 esp32-devkit-v1 gps gps-clock gps-time iot lcd-clock lcd-display st7920 tmp117

Last synced: 2 months ago
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A precision timepiece that syncs with satellites and monitors your environment!

• Host: GitHub
• URL: https://github.com/desiFish/GPS-CLOCK-V1
• Owner: desiFish
• License: gpl-3.0
• Created: 2024-06-30T16:49:08.000Z (11 months ago)
• Default Branch: main
• Last Pushed: 2025-03-01T03:29:06.000Z (3 months ago)
• Last Synced: 2025-03-01T04:23:33.664Z (3 months ago)
• Topics: 128x64, arduino, bh1750, bme280-sensor, bmp280, buzzer, digital-clock, esp32, esp32-devkit-v1, gps, gps-clock, gps-time, iot, lcd-clock, lcd-display, st7920, tmp117
• Language: C++
• Homepage: https://iotthings.pythonanywhere.com/
• Size: 6.27 MB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
  

  
 🌟 ESP32 GPS Clock & Weather Station 


  [![License](https://img.shields.io/badge/License-GPL%20v3-blue.svg?style=for-the-badge)](LICENSE)

  [![ESP32](https://img.shields.io/badge/ESP32-Developer-blue?style=for-the-badge&logo=espressif)](https://www.espressif.com/)

  [![Arduino](https://img.shields.io/badge/Arduino-Compatible-green?style=for-the-badge&logo=arduino)](https://www.arduino.cc/)

  

  [![Status](https://img.shields.io/badge/Status-Active-success?style=for-the-badge)](https://github.com/desiFish/ESP32-GPS-CLOCK-V1)

  [![Issues](https://img.shields.io/github/issues/desiFish/ESP32-GPS-CLOCK-V1?style=for-the-badge)](https://github.com/desiFish/ESP32-GPS-CLOCK-V1/issues)

  


    A precision timepiece that syncs with satellites and monitors your environment! 🛰️

  





  >
⚠️ Enhanced Version Available ⚠️

  >
An improved version of this project with physical buttons for better device configuration is available at:


  >ESP32-GPS-CLOCK-V2

  >


✨ Features


  

    🕒 Time

    GPS-synchronized precise timekeeping

  

  

    🌡️ Environment

    Temperature & humidity monitoring

  

  

    🔆 Display

    Auto-brightness & power saving

  

  

    📱 Connectivity

    WiFi with OTA updates

  



  
🌟 Project Highlights

  

    

      ⚡ Fast GPS Lock

      🌙 Auto Brightness

      🔄 OTA Updates

    

    

      📱 WiFi Manager

      🔋 Battery Backup

      🌡️ Environment Monitor

    

  



🛠️ Hardware Requirements


Core Components 📋

| Component | Purpose | Notes |

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

| ESP32 devkit v1 | 🧠 Controller | DOIT version recommended |

| BH1750 | 💡 Light sensor | I²C interface |

| BME280 | 🌡️ Environment | Temperature/Humidity |

| GPS Neo 6m | 📡 GPS receiver | UART interface |

| ST7920 LCD | 🖥️ Display | 128x64 pixels |

| Buzzer | 🔊 Alerts | Active buzzer |

Optional Components 🔧

- 🔋 LiFePO4 AAA 80mAh (GPS backup)

- ⚡ TP5000 charging circuit

- 🔌 BMS with IN4007 diode

- 🛠️ Prototyping materials



  
🎯 Key Features Explained

  


    
🕒 Precise Timekeeping: GPS-synchronized time with battery backup

    
🌡️ Environmental Monitoring: Temperature and humidity tracking

    
📱 Smart Connectivity: WiFi enabled with web configuration

    
🔆 Adaptive Display: Auto-brightness with power saving

  



⚠️ Important Notice



  ❌ DO NOT USE AHT25 SENSOR!


  Due to significant accuracy issues, we recommend using BME280/BMP280/TMP117 instead.

 


🔋 GPS Battery Modification



  
⚠️ Known Issue with GPS Module's Internal Battery

  


    The NEO-6M GPS modules often come with problematic internal rechargeable batteries that:

    



      
Are frequently dead on arrival

      
Fail to hold charge properly

      
Only last 15-20 minutes when disconnected

      
Cannot be reliably recharged

    

  


  
🛠️ Solution Implemented

  


    To resolve this, I've made the following modifications:

    



      
Removed the internal battery and charging diode

      
Installed a LiFePO4 battery (AAA size)

      
Added TP5000 charging circuit for reliable charging

      
Implemented BMS for deep discharge protection

      
Added diode to drop voltage to 3V for GPS backup pin

    

  


  
💡 User Options

  


    You have two choices:

    


      


Keep Original Battery: 

        


          
Suitable if clock remains powered most of the time

          
No modifications needed

        

      

      


Modify Battery (Recommended):

        


          
Better for frequent power cycles

          
Eliminates 5-10 minute GPS lock delay on cold starts

          
More reliable long-term solution

        

      

    

  



📊 Schematics



    👀 Circuit Diagram

    


    

    
ESP32 GPS Clock Circuit Diagram


  

    

      📝 Format

      High-resolution PNG

    

    

      🔍 Zoom

      Click image to enlarge

    

    

      💾 Download

      Full Resolution

    

  



📸 Gallery



  

    

      

      

        

        
Internal Components 🔧

      

      

        

        
PVC Case 🎨

      

      

        

        
Front View 📱

      

    

    

      

      

        

        
PCB Layout 🔌

      

      

        

        
Internal View 2 🔌

      

      

    

  



📜 License



GNU General Public License v3.0


✅ Permissions



  
Commercial use

  
Modification

  
Distribution

  
Patent use

  
Private use



⚠️ Conditions



  


License and copyright notice: Include the original license and copyright

  


State changes: Document all modifications

  


Disclose source: Make source code available

  


Same license: Use the same license for derivatives



❌ Limitations



  
No liability

  
No warranty





🤝 Contributing



  

    

      🍴 Fork

      🔧 Code

      📤 Push

      📫 PR

    

  



📞 Support



  
If this project helps you, please consider:

  


    ⭐ Giving it a star


    🐛 Reporting issues


    💡 Suggesting improvements


    🤝 Contributing code

  



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