Using two node MCU ESP8266 modules and addressable RGB LED strip, visualize the music, display animated flags, brighten the darkness (with the help of torch and emergency torch modes), and even Adalight compatible. Therefore, you can use it with any kind of Adalight compatible software, such as Prismatik Unofficial

Purpose: Measure the voltage level of the sound output of a device, i.e., computer, and send it to the receiver LED module via UDP protocol to visualize music.

• Ability to change the used wi-fi channel to keep away interference
• Capable of saving the current configuration to external I2C EEPROM to avoid adjusting the settings on each boot
• Different colors and visualizing modes
• Software restart mode for transmitter
• Very low latency (no noticeable lag even with listening to music with wired headphones)
• Analog or serial data acquisition

• Flag colored flowing light
• Ambiance light changing color according to the seen video on the computer screen
• Emergency light (with different tones of white)

• Both transmitter and receiver stations’ CPU frequency is set to 160 MHz to increase stability and smoothness
• Due to the nature of the UDP, sometimes packet drops occur. If the packet drops are incredibly high, changing the wi-fi channel is required.

• Please watch the complete demonstration video on YouTube.
• You may also want to watch my playlist consisting of uncopyrighted music visualized by this project.

• Smooth bar music visualizer in different color modes (steady gradient, flowing gradient, color shifting)
• Fast bar visualizer
• Brightness changing visualizer
• Optional music indicator and seconds indicator for all modes

• Warm white light, 2700K color temperature.
• Optional seconds indicator

• Display your county's flag colors on the RGB stick
• Not music reactive

• Various colored lights in the color range 2700K to 6500K (press the red button once to change color)
• Adjustable brightness
• Optional seconds indicator (double press the red button to enable/disable seconds indicator)

• Adalight client for Adalight compatible software

Unpress the toggle switch first, then power up. If the transmitter station is near the receiver and turned on, the receiver will connect to the transmitter automatically and run according to the transmitter's configuration.

• Connect the 3.5mm audio jack to the audio source (PC/phone/tablet etc.) via y-splitter cable
• Select source as analog at the menu

• Connect the transmitter station to a PC via USB cable.
• Install a client ( example: https://github.com/Mehmet-Emre-Dogan/vu-meter-with-serial ) to the PC to passthrough the audio signal from PC speaker/microphone to the transmitter station
• Select source as serial at the menu

Press the toggle switch, adjust the potentiometer knob to the maximum, then power up the receiver. If you see the red, green, blue colors, respectively, the Adalight client mode has been initialized successfully.

Press the toggle switch, and adjust the potentiometer below the maximum value, then power up. Note that the potentiometer is software inverted in the emergency torch mode so that the brightness increases when the potentiometer is rotated clockwise. (I did this because I was lazy to open the box again and swap the potentiometer positive and ground connections by desoldering and resoldering. I need to do the soldering job again because the purple cable has a jumper pin, but the blue one does not. The cables mentioned above can be seen on the image titled Receiver station lid )

To your mode selection be valid, you need to restart the receiver station after adjusting the switch and the potentiometer. To restart, simply cut the power off and then back on.

When the menu item title is highlighted, rotating the rotary encoder will change which setting you are about to change. When a variable is highlighted, rotating the encoder will change the value of the variable. Pressing the rotary encoder button will swap the selected item. For example, when the 'Brightness' is selected, if you press the encoder button, the brightness value will be selected to adjust the brightness of the LEDs.

When you adjust the settings, move to 'saveConfig.' on the menu and press the rotary encoder button to write your current configuration to the external EEPROM.

Please install the libraries below if you have not done yet.

• Fastled library
• Adafruit GFX library
• Adafruit SSD1306 library
• SoftwareI2C library

They are not directly related to the project. However, they are worth mentioning.

When necessary, the external boost converter module can be used to power the device via a power bank or any device that is powerful enough and has a USB out. Warning: You may need to decrease the brightness of the LEDs if your power gadget is not capable enough to run the device flawlessly. Most of the time, if you try to draw more current than your power gadget can handle, your power gadget will disconnect its battery from the output, and you will need to restart your power device. Sometimes, your power device can automatically do this restart process and cause the LEDs to flicker/blink. Therefore, if you face any abnormal behaviors like above mentioned, my advice is to decrease the brightness first (from the transmitter module or the potentiometer, in emergency torch mode) and then turn off and on the receiver station using the switch on the external boost converter module or directly plug out the USB cable and plug it in back.

Since the meter screen is multiplexing the seven-segment displays, in the above photos, the screen seems corrupted. However, this is not the case. By the way, with the naked eye, this multiplexing is not noticeable as expected.

The setup to record line output of the PC with any mobile phone. There is a 10 kOhm resistor between any signal output channel, left or right, to mobile phone microphone input.