ESP32-MiniWebRadio V3.4

MiniWebRadio Features:

User interfaces: TFT touchscreen display, web browser and FTP
Functions: WiFi Radio, Digital Clock, MP3 player, Alarm, Sleep timer, adjust screen brightness, EQ settings and Volume, web browser User Interface, access SD card via FTP (e.g. FileZilla), IR remote controller support
Up to 999 pre-set stations can be held in stations.csv file on SD card (can edit using web UI)
Each station can display its own station icon (when saved to SD card)
Time is obtained via Network Time Protocol (NTP) from internet. Local Time Zone can be set from web UI
Web UI - MiniWebRadio can be accessed via any web browser (e.g. IE/Edge/Chrome/FireFox)
Internal SD card can be accessed via FTP (e.g. FileZilla)
Your home WiFi router SSID and password can be set using the browser on your smart phone (only required on first boot) or edit the networks.csv file on SD card
Play audio files on SD card or on DLNA home network (via web UI)
Use Infra-Red (IR) remote controller (38kHz NEC-encoded - e.g. arduino or mp3 remote). The web UI allows you to configure the buttons if required
One Alarm time can be pre-set using display (choose days, Monday-Sunday)
A Sleep timer can be set using display (switches off sound and screen after a pre-set time - max. 6 hours)
Can announce the time each hour when in radio mode (set via web UI)
Screen brightness can be adjusted using display (if the display has a backlight-pin)
Supports the Latin, Greek and Cyrillic character sets
Community Radio Browser is integrated as a search engine. User can find new stations and then add them to the station list via web UI (with station icon if available) and then save the list and station icon file to the SD card
Channel lists can be exported or imported in Excel format (for data backup).

Required HW:

ESP32 or ESP32-S3 board with PSRAM
External DAC (e.g. PCM5102a, CS4344, PT8211, AC101, ES8388)
TFT Display with Touchpad (SPI), Display controller can be ILI9341 (320x240px), ILI9486 (480x320px), ILI9488 (480x320px) or ST7796 (480x320px)
SD Card (FAT32) + SD adapter (can use SD slot on back of TFT display if available)

Optional HW:

IR receiver + IR remote controller according to the NFC protocol
KCX_BT_EMITTER V1.7, for connecting external Bluetooth devices in the sending or receiving direction, a connection with voice assistants such as ALEXA is possible
BH1750 light sensor: The BH1750 has a wide range of values, which is still sufficiently sensitive at average room brightness. On the display, you can set the desired brightness when the sensor is darkened. Then the display is dimmed to this value 'at night'.

Control is via the display touchscreen or a web page in a browser, no additional components such as switches, rotary encoders, capacitors or resistors are required.

Schematic

Display Layout

Using the Community Radio Browser

How to install : PlatformIO is definitely recommended as the IDE.

Some features:

The audioprocess works in its own task and is decoupled. This prevents dropouts when drawing on the display or when the website is loading.
The SD card is wired as SD_MMC to improve stability and increase speed. This means that the GPIOs cannot be chosen freely. The SD card adapter must not have any resistors in series. For best display update speed, use 40MHz frequency for SD card if possible (SDMMC_FREQUENCY 40000000 in common.h).
Audio can be decoded using software. Possible formats are mp3, aac, mp4, opus, vorbis and flac.
External DACs (e.g. UDA13348, MAX98357A, PCM5102A) are connected via I2S, ES8388 and AC101 also require an I2C connection
480x320px display supported. The ILI9486 (SPI display from the Raspberry PI) is also supported
The SD card files can be accessed via FTP. See settings for Filezilla. The username and password are 'esp32' (this can be changed in 'common.h')
Access Point SSID/password can be set using mobile phone browser - no need to modify source code or networks.csv file on SD card
Stations URLs support entry of username and password if the server expects access data, "URL|user|pwd"
Can process local playlists in m3u format
Either the ESP32 or the ESP32-S3 can be used (PSRAM is highly recommended)
IR remote button codes can be changed by user using web UI
Improved web UI reliability
VU meter added to display
Timezone can be set using web UI
Play media files on home network DLNA (uPNP/DLNA app on smart phone, router, etc.)
Prevent clicks when changing radio stations

Codec	ESP32	ESP32-S3
mp3	y	y
aac	y	y
aacp	y (mono)	y (+SBR, +PS)
wav	y	y
flac	y	y	blocksize max 8192 bytes
vorbis	y <=196Kbit/s	y <=256Kbit/s
m4a	y	y
opus	y	y	celt only

self-made devices of the users

Known problems

SD Card

In the simplest case, the SD card is connected directly to the ESP32

Some SD card adapters for displays use series resistors. These are useless and in many cases harmful. Therefore, it is better to remove them and replace them with solder bridges.

If an ESP32 is used, any existing pull-up resistor at pin D0 must be removed (ESP32 - bootstrap pin). This will be added again later via SW. This is not necessary with the ESP32-S3. (Photo from the ESPuino forum)

Display

Many displays can be used without any problems. If the touchpad does not work, it may be that the TFT controller does not enable the SPI bus. This is the case with my ILI9488 display. Then MISO of the TFT controller must not be connected.

DAC

On some PCM5102 boards the solder bridges are missing on the back.

This is how the DAC CS4344 is connected:

If the DAC PT8211 is used, the I2S_COMM_FMT must be changed in common.h. This DAC requires Japanese LSBJ (Least Significant Bit Justified) format

IR Receíver

Various 38KHz IR receivers can be used. While the TSOP4838 can be used without any problems, the VS1838B is very sensitive to high frequency fields despite its metal shielding. The VS1838B should not be installed near the WiFi antenna.

IR Remote Control

The remote control must support the NEC protocol. If several remote controls are operated in one room, they must have different address codes to avoid mutual interference. The "Arduino" remote control on the left in the picture uses the address code 0x00FF and the "Android X96" remote control (right) uses the address code 0x01FE.