Documentation #2

README.md

@@ -1,9 +1,24 @@
 # Tonuino based on ESP32 with I2S-output
 
 ## Disclaimer
-This is a fork of the popular [Tonuino-project](https://github.com/xfjx/TonUINO) which means, that it only shares the basic concept of controlling music-play by RFID-tags and buttons. Said this I want to make clear, that the code-basis is completely different. So there might be features, that a supported by my fork whereas others are missing or implemented different.
+This is a fork of the popular [Tonuino-project](https://github.com/xfjx/TonUINO) which means, that it only shares the basic concept of controlling music-play by RFID-tags and buttons. Said this I want to make clear, that the code-basis is completely different. So there might be features, that a supported by my fork whereas others are missing or implemented different. For sure both share, that's it's non-profit, DIY and developed on [Arduino](https://www.arduino.cc/).
 
 ## What's different (basically)?
 The original project makes use of microcontrollers (uC) like Arduino nano (which is the Microchip AVR-platform behind the scenes). Music-decoding is done in hardware using [DFPlayer mini](https://wiki.dfrobot.com/DFPlayer_Mini_SKU_DFR0299) which also has a uSD-card-slot and an integrated amp as well. Control of this unit is done by a serial-interconnect with the uC using an api provided.
 
 The core of my implementation is based on the popular [ESP32 by Espressif](https://www.espressif.com/en/products/hardware/esp32/overview). Having WiFi-support out of the box makes it possible to provide features like an integrated FTP-server (to feed the player with music), smarthome-integration by using MQTT and webradio. However, my aim was to port the project on a modular base which means, that music-decoding takes place in software with a dedicated uSD-card and music-output with I2S. I did all my tests on [Adafruit's MAX98357A](https://learn.adafruit.com/adafruit-max98357-i2s-class-d-mono-amp/pinouts). Hopefully, not only in theory, other DACs can be used as well.
+
+## Basic concept/handling
+The basic idea of Tonuino (and my fork as well) is to provide a way, to use the Arduino-platform for a music-control-concept that is derived from the popular Toniebox. This basically means that RFID-tags are used to direct a music-player. Even for kids is concept is simple: place an RFID-object (card, character) on top of a box and the music starts to play. Place another object on it and the player plays anything else.
+
+## Hardware-setup
+So it's about time to have a look at the hardware I used. I'm using an ESP32 on a development-board that more or less looks like [this](https://docs.zerynth.com/latest/official/board.zerynth.nodemcu_esp32/docs/index.html). If ordered in China (Aliexpress, eBay e.g.) it's pretty cheap (around 4€) but even in Europe it's only around 8€.
+[Adafruit's MAX98357A](https://learn.adafruit.com/adafruit-max98357-i2s-class-d-mono-amp/pinouts)
+[uSD-card-reader](https://www.amazon.de/AZDelivery-Reader-Speicher-Memory-Arduino/dp/B077MB17JB)
+[RFID-reader](https://www.amazon.de/AZDelivery-Reader-Arduino-Raspberry-gratis/dp/B074S8MRQ7)
+[RFID-tags](https://www.amazon.de/AZDelivery-Keycard-56MHz-Schlüsselkarte-Karte/dp/B07TVJPTM7)
+[Neopixel-ring](https://www.ebay.de/itm/16Bit-RGB-LED-Ring-WS2812-5V-ahnl-Neopixel-fur-Arduino-Raspberry-Pi/173881828935)
+[Rotary Encoder](https://www.amazon.de/gp/product/B07T3672VK)
+[Buttons](https://de.aliexpress.com/item/32697109472.html)
+
+Most of them can be ordered cheaper directly in China. It's just a give an short impression of the hardware.