ESP32-HUB75-MatrixPanel-DMA
ESP32-A2DP
ESP32-HUB75-MatrixPanel-DMA | ESP32-A2DP | |
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13 | 18 | |
831 | 1,413 | |
- | - | |
7.8 | 8.5 | |
10 days ago | 9 days ago | |
C++ | C++ | |
MIT License | Apache License 2.0 |
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ESP32-HUB75-MatrixPanel-DMA
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Diffuser for pixel matrix
I whipped up a quick ESPHome wrapper (as a custom component) for this library: https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-DMA
- What would I need to make this with arduino?
- Cloud Based LED Matrix (HUB75) Display Controllers
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Taking over a Dead IoT Company
The ESP32 can handle a 64x64 HUB75 display pretty handily. Several of them, even. There’s a solid library out there [0] that just pumps pixels right from memory via the ESP32’s built-in DMA engine. Adafruit_GFX is the supported library for drawing primitives/text/bitmaps/etc., so you can re-use a lot of code that’s out there.
But let’s start with a simple, quick hit of dopamine: There’s a web-based installer [1] (it uses web serial, so Chrome is required) for a couple varieties of clock designed for a 64x64 HUB75 panel and an ESP32. $20 in parts from AliExpress if you already have a suitable 5V power supply.
To use that site, all you need is that aforementioned 5V power supply—4A or more recommended, 10A if you’re planning to drive a full panel of pixels on an outdoor panel at full brightness—a 64x64 HUB75 matrix panel, and an ESP32. Everything except power is run directly to the ESP32. Many panels even come with a 16-pin female IDC connector for the panel, with individual DuPont-style female connectors at the other end that you can just slip over the pins on the ESP32.
The source code for each clock (repo is linked from the web page) is a great starting point for making your own versions.
The panels, as others have mentioned, are shockingly cheap from the usual sources like eBay [2] or AliExpress (search for “HUB75 panel” or “p3 64x64”), but even those in a hurry can get a 64x64 panel for under $40 from Amazon [3].
[0]: https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-DMA
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Just finished this rebuild from original to ESP32
I'm about to share the whole project documentation in german. I used ESP32-HUB75-MatrixPanel-DMA with additional 74HC245 to shift the levels up from 3.3 to 5v (as there is a 2m flat cable running through the frame to the display). The Library is based of Adafruit GFX, for which you can find plenty of examples. If you don't want blanking, use two buffers or partially repaint (for the text and image animation I added black filled boxes on each redraw before painting the new position/text). The ESP32 has just enough pins to power the basic functions, but I'm about to order a new PCB with a portexpander, which frees some pins and allows for blinking buttons. Will add a DFPlayer Mini as well, as soon my customer decided, which MP3 files he wants.
- Tidbyt hardware display device: a review
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how do i connect this panel to my esp32/breadboard? cant find any videos online i want to run a pxmatrix library
will this work? , also im very new to this space but very willing to learn . so far all i have is the freenove starterkit that came with an esp32 because the first one i got from aliexpress wasn't showing up in arduino IDE, but i have a feeling it just wasn't configured properly.
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Read gif from sd card, display on Wa2812B matrix. Difficult to find examples.
Here's some sample code that does exactly that this is a "HUB75" board, but it looks like a HUB75 is just an ESP32 with an LED matrix attached. The code should work fine for you so long as you change the number of LEDs, and the pin out.
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animated gifs in circuitpython
unless someone can help me fix the Arduino Code...
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Working on a DMD that displays GIFS, what do you think?
See: https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA#panels-supported
ESP32-A2DP
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Retreive time & date, cellular signal strength and battery percentage information via Bluetooth on esp32
Whole thing is programmed using Arduino library in platformio and for a2dp sink im using pschatzmann library https://github.com/pschatzmann/ESP32-A2DP
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Esp8266 as a wireless audio streamer
The ESP8266 won’t work, since it doesn’t support Bluetooth. You’ll need an ESP32 and an I2S DAC. I built something similar based on this library: https://github.com/pschatzmann/ESP32-A2DP
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Synth with USB computer keyboard input and bluetooth speaker output
I want to turn a USB computer keyboard into a musical instrument where i can press a key and a sound is played on my bluetooth speaker. I have played around with https://github.com/pschatzmann/ESP32-A2DP and managed to hardcode a little tune and play it on the speaker. Unfortunately that alone already uses 80% of the esp32 flash memory and I need some more space to read the keyboard input and do a little bit of sound design on top of that. I’m looking for suggestions on a controller (combination of controllers) would be best suited for the job, with the constraint that it should have low power consumption.
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Audio and Arduino
Check out arduino-audio-tools and other libraries it can make use of, such as ESP32-A2DP. It's tailored towards ESP32 devices, but also supports the RP2040 and others.
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Outputting the AudioPLL to an external DAC
For all other i2s pinouts, I'm leaning on this GitHub-project: https://github.com/pschatzmann/ESP32-A2DP
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Sending data (wav files) from esp 32 to PC
You can use Bluetooth A2DP. This is the same standard used in Bluetooth headphones. Several implementations are available https://github.com/pschatzmann/ESP32-A2DP
- BT Transmitter from 3.5mm audio jack
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24bit 48kHz ADC and DAC recommendations for audio
A2DP library: https://github.com/pschatzmann/ESP32-A2DP
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Use of ESP32 as Bluetooth audio receiver
I recently discovered that the ESP32 could be used to receive audio via Bluetooth and since I'm using one as part of my build anyway (for controlling peripherals and LED outputs) I was thinking to just use the ESP32's onboard Bluetooth rather than a dedicated chip/module. After looking through some example code and the ESP32-A2DP library, I feel confident that this would work but is anyone able to see any caveats in doing this other than not being able to support aptx?
- esp32 to aux in
What are some alternatives?
ESP_Python_Serial - A tutorial on how to make an ESP and a Python script (running on PC or a RPi) communicate via Serial and do useful stuff while communicating
esp32-bluetooth-audio-adafruit - An ESP32 bluetooth audio receiver using an adafruit breakout
stm32-usart-uart-dma-rx-tx - STM32 examples for USART using DMA for efficient RX and TX transmission
AutoConnect - An Arduino library for ESP8266/ESP32 WLAN configuration at runtime with the Web interface
ESP32-HUB75-MatrixPanel-I2S-D
arduinoFFT - Fast Fourier Transform for Arduino
dmdclock
Mach3Controller - Android / ESP32 / ESP8266 Controller (+ coordinate display) for Mach3 CNC
NeoGB-Printer - An open-source and standalone Gameboy Printer emulator 100% compatible with all officially released games (110 in total) that support the accessory. Just print and save the images as BMP
MatrixFireFast - A fire simulation for LED matrix displays on Arduino/ESP8266/ESP32 using the FastLED library.
dscKeybusInterface - An Arduino/esp8266/esp32 library to directly interface with DSC security systems.