SunriseLEDs

ESP8266 based project to slowly light a 12v LED strip or any other PWM controlled source of light to simulate sunrise light.
Control using Telegram bot / MQTT (good for home assistant) / local network web dashboard.

Motivation

I always appreciate waking up when the room is lit, but a big tree covers my single window and no light enters through it.
Introducing - my own private sunrise.

Also good if you wake up after/before sunrise and want to have your own sunrise.

System Requirements

• Set a time for a target brightness and total durations
• Control using local webpage
• OTA updates over WiFi
• Find way to avoid soldering and 12v power supply (maybe 5V LED strip?)
• Add smart switch mode - just start a sunrise as soon as powered on
• Push button integration to turn lights completely on and off, as god intended for a light
• Add indication of currently set alarm if set

Prerequisites

• ESP8266 (NodeMCU preferably)
• P-Channel MOSFET
• 12v Power Supply
• 12v to 5v Converter
  • Alternatively use another 5V source with a common ground with the 12v power supply
• Soldering capabilities
• 12V LED Strip (3528/5050 Warm White is a good choice)

Method

Hardware

1. ESP8266/32 (NodeMCU preferably) to connect to run the code, connect to WiFi and generate a relevant PWM signal
2. 12V LED Strip that is dimmed by the 12V PWM Signal
3. P-Channel MOSFET to "convert" the 3.3V PWM to 12V PWM

Software

1. Get a fixed format message from various sources -
   1. Local webpage
   2. Telegram channel with a bot / conversation with a bot to control
   3. MQTT
2. Create a single-time alarm for a specific time to initiate the sunrise routine
3. Increment PWM duty cycle until full @ the right time

Getting Started

Building it

This is the "electrical schematics"
Default GPIO is 2

I used IRF9540N P-Channel MOSFET and cut a breadboard with a box opener

Installation

1. Clone the project and open a PlatformIO Workspace
   1. If you are using Arduino IDE, just copy the main.cpp and config_example.h
2. Rename config_example.h to config.h and update configuration
3. Comment out upload_port = XX.XX.XX.XX to make sure you can upload through USB, change the ip address and uncomment later for OTA

Usage

In every method (Dashboard/MQTT/Telegram) you control these parameters -

• Current brightness - ...
• Max brightness - the target brightness that the sunrise will reach
• Sunrise Duration (minutes) - how many minutes will the sunrise take - meaning the sunrise will start from [Sunrise Duration] minutes before [Sunrise Time]
• Sunrise time - when will the LEDs reach FULL brightness

Web Dashboard

1. Locate your ESP IP address using router admin dashboard or other methods
2. Type it in your web browser

Telegram

1. Create a bot and get your token and chat id
2. Edit the configuration

Messages format

• /settime HH:MM - to set the sunrise time and activate it
• /setduration MINUTES - to set the Sunrise Duration (minutes)
• /setbrightness BRIGHTNESS - to set the current brightness
• /setmaxbrightness - to set the target sunrise brightness
• /reboot

MQTT

1. Configure publisher IP and topic in the config
2. Publish same messages as above

Extras

You can 3D print a box that has:

1. Standoffs for an upside down ESP8266 NodeMCU to be mounted using self-tapping screws
2. Holes for barrel jack panel connector
3. A lid and holes for screws

Download "box_and_lid.stl", slice it and go ahead