KaraDio32 in dev state: Stable
Works on any esp32 board.
See the feature on https://hackaday.io/project/11570-wifi-webradio-with-esp8266-and-vs1053
The esp32 adds the output on the internal dac or with i2s to an external dac
but only mp3 stations can be played.
Adding a vs1053 board, all stations can be played.
Compatible with esp8266 KaRadio addons.
Uart or telnet commands: http://karadio.karawin.fr/Interface.txt
Work with i2s, internal DAC or a vs1053
Output mode set in Setting panel on web page of KaraDio32:
I2S for connection to ac external DAC
I2SMERUS to connect a merus amplifier
DAC to use the built in DAC of the esp32
PDM to output a PDM (Pulse Density Modulation) stream
VS1053 to connect to a vs1053 board.
LCD or Oled support integrated: most common b/w or color oled and lcd can be used.
Programmable lcd off timer
Date format DD:MM:YYYY or MM:DD:YYYY .
Remote IR support integrated. Nec protocol only.
Rotary encoder support integrated. Common functions: play/stop, volume, station change, date time display.
To build your own release, you must install the idf https://github.com/espressif/esp-idf and the toolchain.
To flash all build output, run 'make flash' or:
python /home/yourhome/esp/esp-idf/components/esptool_py/esptool/esptool.py --chip esp32 --port com5 --baud 460800 --before default_reset --after hard_reset write_flash -u --flash_mode dio --flash_freq 40m --flash_size detect 0x1000 /home/yourhome/esp/Ka-Radio32/build/bootloader/bootloader.bin 0x10000 /home/yourhome/esp/Ka-Radio32/build/KaRadio32.bin 0x8000 /home/yourhome/esp/Ka-Radio32/build/partitions.bin
//file gpio.h
//-------------------------------//
// Define GPIO used in KaRadio32 //
//-------------------------------//
// Compatible ESP32 ADB
// https://www.tindie.com/products/microwavemont/esp32-audio-developing-board-esp32-adb/
// HSPI pins
//-----------
#define PIN_NUM_MISO GPIO_NUM_19 // Master Input, Slave Output
#define PIN_NUM_MOSI GPIO_NUM_23 // Master Output, Slave Input Named Data or SDA or D1 for oled
#define PIN_NUM_CLK GPIO_NUM_18 // Master clock Named SCL or SCK or D0 for oled
// status led if any.
//-------------------
#define GPIO_LED GPIO_NUM_4 // Flashing led or Playing led
// gpio of the vs1053
//-------------------
#define PIN_NUM_XCS GPIO_NUM_32
#define PIN_NUM_RST GPIO_NUM_12
#define PIN_NUM_XDCS GPIO_NUM_33
#define PIN_NUM_DREQ GPIO_NUM_34
// + HSPI pins
// Encoder knob
//-------------
#define PIN_ENC_A GPIO_NUM_16 // CLK
#define PIN_ENC_B GPIO_NUM_17 // DT
#define PIN_ENC_BTN GPIO_NUM_5 // SW
// I2C lcd
//----------
#define PIN_I2C_SCL GPIO_NUM_14
#define PIN_I2C_SDA GPIO_NUM_13
#define PIN_I2C_RST GPIO_NUM_2 // or not used
// SPI lcd
//---------
// HSPI pins +
#define PIN_LCD_CS GPIO_NUM_13 //CS
#define PIN_LCD_A0 GPIO_NUM_14 //A0 or D/C
#define PIN_LCD_RST GPIO_NUM_2 //Reset RES RST or not used
// IR Signal
//-----------
#define PIN_IR_SIGNAL GPIO_NUM_21 // Remote IR source
// I2S DAC or PDM output
//-----------------------
#define PIN_I2S_LRCK GPIO_NUM_25
#define PIN_I2S_BCLK GPIO_NUM_26
#define PIN_I2S_DATA GPIO_NUM_22
The type of lcd can be set with the uart or telnet command sys.lcd("x")
Status: Ready.
Other type and some color lcd added later.
// min 128x64
#define LCD_I2C 0
#define LCD_NONE 255
// Black&White
//I2C
#define LCD_I2C_SH1106 0 //128X64
#define LCD_I2C_SSD1306 1 //128X64
#define LCD_I2C_SSD1309 2 //128X64
#define LCD_I2C_SSD1325 3 //128X64
#define LCD_I2C_SSD1306NN 4 //128X64
#define LCD_I2C_SSD1309NN 5 //128X64
#define LCD_I2C_SSD1306UN 6 //128x32
//SPI
#define LCD_SPI_SSD1306 64 //128X32 (LCD_SPI =0x40)
#define LCD_SPI_SSD1309 65 //128X64
#define LCD_SPI_ST7565_ZOLEN 66 //128X64
#define LCD_SPI_SSD1322_NHD 67 //256X64
#define LCD_SPI_IL3820_V2 68 //296X128
#define LCD_SPI_SSD1607 69 //200X200
#define LCD_SPI_LS013B7DH03 70 //128X128
#define LCD_SPI_SSD1306NN 71 //128X64
#define LCD_SPI_SSD1309NN 72 //128X64
#define LCD_SPI_ST7920 73 //128X64
// Colors
#define LCD_SPI_ST7735 192 // 128x160 (LCD_COLOR|LCD_SPI =0xC0)
#define LCD_SPI_SSD1351 193 // 128x128
#define LCD_SPI_ILI9341 194 // 240x320
#define LCD_SPI_ILI9163 195 // 128x128
#define LCD_SPI_PCF8833 196 // 132x132
#define LCD_SPI_SSD1331 197 // 96x64
#define LCD_SPI_SEPS225 198 // 96x64
In the Setting panel on the webpage of KaraDio32 you can set the desired output method for audio.
For output on a simple speaker or a general analog amplifier
- DAC to use the built in DAC of the esp32
- PDM to output a PDM (Pulse Density Modulation) stream. Wiki on PDM : https://en.wikipedia.org/wiki/Pulse-density_modulation
For output via addional I2S or VS1053 hardware
- I2S for connection to ac external DAC
- I2SMERUS to connect a merus amplifier
- VS1053 to connect to a vs1053 board.
You can connect the GPIO25 (left audio channel), GPIO26 (right audio channel) and Ground directly to a small loudspeaker, a simple earphone (like from an mp3 player) or the input of an analog amplifier. The quality is less perfect than using an I2S or VS1053 board, bit it is very simple hardware-wise.
Connect like this
+------------------------------------+
ESP32-GPIO25 (left) -----+speaker/earphone/analog-amp (left) +-----+
+------------------------------------+ |
|
+------------------------------------+ |
ESP32-GPIO26 (right) ----+speaker/earphone/analog-amp (right +------+
+------------------------------------+ |
|
ESP32-GROUND --------------------------------------------------------+
If the audio signal level is too high for your speaker, earphone or amplifier you can add a potentiometer to decrease the level. Connect the potentiometer like this (only pictured for 1 audio channel, for stereo you need 2 potentiometers or a stereo-potmeter.
+--------------------------------------+
ESP32-GPIO25 (left) -------+ +-----+speaker/earphone/analog-amp (left) +------+
+-+ | +--------------------------------------+ |
+P+ | |
+o+--+ |
+t+ |
+++ |
| |
ESP32-GROUND --------------+-------------------------------------------------------+
An analog DAC signal always has some noise that may cause some distortion on the audio output, especially on low volume passages in the sound. This noise can be decreased with a low-pass filter. The digital PDM signal needs allways low pass filter to convert the digital signal to an analog signal. Fortunately the speaker and earphone acts as a low pass filter, although not in a perfect way.
You can improve the analog signal with an external low-pass filter. A simple low-pass RC filter can be find on the internet, f.i. here : http://www.pavouk.org/hw/usbdac/en_index.html.
If Karadio32 is configured to use ADC, PDM or I2S output (to an external dac) it can play audio streams in mp3 format. Other formats like AAC and WMV require too much dynamic memories and can not be played this way.
When you want to play other formats you add an external VS1053 decoder to Karadio. Details on the features of this decoder can be found here : http://www.vlsi.fi/en/products/vs1053.html
Many boards can be found at https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20180113141636&SearchText=vs1053b
Normally a radio station is played without interruption.
But when a connection to the server of the radio station is (temporarily) disrupted (due to internet problems or server problems) Karadio behaves as follows:
- Playing of the radio stream stops, after a short while Karadio retries to relaunch the connection to the radio stream.
- If the relaunch of the connection fails again, the webpage of Karadio then shows “invalid address” and goes into the stop state. If you have a display connected to Karadio it will then show the Date, Time and IP address.
- You can try to relaunch the connection manually by pressing “play” on the Karadio webpage, or resetting the ESP32.
- If the wifi is disconnected, the esp is rebooted.
- If the acces point of your router is not known, the webradio inits itself as an AP. Connect the wifi of your computer to the ssid "WifiKaRadio",
- Browse to 192.168.4.1 to display the page, got to "setting" "Wifi" and configure your ssid ap, the password if any, the wanted IP or use dhcp if you know how to retrieve the dhcp given ip (terminal or scan of the network).
- In the gateway field, enter the ip address of your router.
- Validate. The equipment restart to the new configuration. Connect your wifi to your AP and browse to the ip given in configuration.
- Congratulation, you can edit your own station list. Dont forget to save your stations list in case of problem or for new equipments.
- if the AP is already know by the esp32, the default ip is given by dhcp.
- a sample of stations list is on http://karadio.karawin.fr/WebStations.txt . Can be uploaded via the web page.
To flash your KaRadio32 you will need these files:
http://karadio.karawin.fr/KaRadio32.bin
and
http://karadio.karawin.fr/KaRadio32sup.zip
The tool to use is here: http://espressif.com/en/support/download/other-tools
(change the security of the installation directory to permit all)
See the image at http://karadio.karawin.fr/karawin32Flash.jpg
The scheme from tomasf71
https://github.com/espressif/esp-idf the espressif IDF
https://hackaday.io/project/11570-wifi-webradio-with-esp8266-and-vs1053 The esp8266 KaRadio
https://github.com/karawin/karadio-addons The KaRadio addons
https://github.com/kodera2t/ESP32_OLED_webradio webradio for ESP-ADB module
https://github.com/MrBuddyCasino/ESP32_MP3_Decoder webradio with the MP3 decoder software
https://github.com/olikraus/u8g2 Black/White oled lcd library
https://github.com/olikraus/ucglib color lcd library
https://github.com/nkolban/esp32-snippets/tree/master/hardware/displays/U8G2 u8g2 Hal for esp32
https://github.com/soligen2010/encoder Encoder
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