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README.md

Squeezelite-esp32

Supported Hardware

SqueezeAMP

Works with the SqueezeAMP see here and here. Add repository https://raw.githubusercontent.com/sle118/squeezelite-esp32/master/plugin/repo.xml to LMS if you want to have a display

Use the squeezelite-esp32-SqueezeAmp-sdkconfig.defaults configuration file.

ESP32-A1S

Works with ESP32-A1S module that includes audio codec and headset output. You still need to use a demo board or an external amplifier if you want direct speaker connection.

ESP32-WROVER + I2S DAC

Squeezelite-esp32 requires esp32 chipset and 4MB PSRAM. ESP32-WROVER meets these requirements. To get an audio output an I2S DAC can be used. Cheap PCM5102 I2S DACs work others may also work. PCM5012 DACs can be hooked up via:

I2S - WROVER
VCC - 3.3V
3.3V - 3.3V
GND - GND
FLT - GND
DMP - GND
SCL - GND
BCK - (BCK - see below)
DIN - (DO - see below)
LCK - (WS - see below) FMT - GND
XMT - 3.3V

Use the squeezelite-esp32-I2S-4MFlash-sdkconfig.defaults configuration file.

Configuration

To access NVS, in the webUI, go to credits and select "shows nvs editor". Go into the NVS editor tab to change NFS parameters. In syntax description below <> means a value while [] describe optional parameters.

I2C

The NVS parameter "i2c_config" set the i2c's gpio used for generic purpose (e.g. display). Leave it blank to disable I2C usage. Note that on SqueezeAMP, port must be 1. Default speed is 400000. Syntax is

sda=<gpio>,scl=<gpio>[,port=0|1][,speed=<speed>]

SPI

The NVS parameter "spi_config" set the spi's gpio used for generic purpose (e.g. display). Leave it blank to disable SPI usage. The DC parameter is needed for displays. Syntax is

data=<gpio>,clk=<gpio>[,dc=<gpio>][,host=1|2]

DAC/I2S

The NVS parameter "dac_config" set the gpio used for i2s communication with your DAC. You can define the defaults at compile time but nvs parameter takes precedence except for SqueezeAMP and A1S where these are forced at runtime. If your DAC also requires i2c, then you must go the re-compile route. Syntax is

bck=<gpio>,ws=<gpio>,do=<gpio>

SPDIF

The NVS parameter "spdif_config" sets the i2s's gpio needed for SPDIF.

SPDIF is made available by re-using i2s interface in a non-standard way, so although only one pin (DO) is needed, the controller must be fully initialized, so the bit clock (bck) and word clock (ws) must be set as well. As i2s and SPDIF are mutually exclusive, you can reuse the same IO if your hardware allows so.

You can define the defaults at compile time but nvs parameter takes precedence except for SqueezeAMP where these are forced at runtime.

Leave it blank to disable SPDIF usage, you can also define them at compile time using "make menuconfig". Syntax is

bck=<gpio>,ws=<gpio>,do=<gpio>

Display

The NVS parameter "display_config" sets the parameters for an optional display. Syntax is

I2C,width=<pixels>,height=<pixels>[address=<i2c_address>][,HFlip][,VFlip][driver=SSD1306|SSD1326|SH1106]
SPI,width=<pixels>,height=<pixels>,cs=<gpio>[,speed=<speed>][,HFlip][,VFlip][driver=SSD1306|SSD1326|SH1106]
  • VFlip and HFlip are optional can be used to change display orientation
  • Default speed is 8000000 (8MHz)

Currently 128x32/64 I2C display like this and this are supported

The NVS parameter "metadata_config" sets how metadata is displayed for AirPlay and Bluetooth. Syntax is

[format=<display_content>][,speed=<speed>]
  • 'speed' is the scrolling speed in ms (default is 33ms)

  • 'format' can contain free text and any of the 3 keywords %artist%, %album%, %title%. Using that format string, the keywords are replaced by their value to build the string to be displayed. Note that the plain text following a keyword that happens to be empty during playback of a track will be removed. For example, if you have set format=%artist% - %title% and there is no artist in the metadata then only