esp-idf-fm-radio

FM radio using esp-idf.

I used this component.
This component can communicate directly with the browser.
There is an example of using the component here. It's a great job.

I used this for segment display.

Software requiment

ESP-IDF V4.4/V5.x.
ESP-IDF V5.0 is required when using ESP32-C2.
ESP-IDF V5.1 is required when using ESP32-C6.

Hardware requirements

TEA5767 FM Stereo Radio Module.
I bought this on AliExpress about $4.

The module has a standard antenna, but if you want to use it in a room, you need a long antenna.
With a long antenna, you can get more signals.
I used an AC power cable.

Installation

git clone https://github.com/nopnop2002/esp-idf-fm-radio
cd esp-idf-fm-radio
git clone https://github.com/Molorius/esp32-websocket components/websocket
idf.py set-target {esp32/esp32s2/esp32s3/esp32c2/esp32c3/esp32c6}
idf.py menuconfig
idf.py flash

Configuration

WiFi Setting

You can use Static IP.

You can use the MDNS hostname instead of the IP address.

• esp-idf V4.3 or earlier
  You will need to manually change the mDNS strict mode according to this instruction.
• esp-idf V4.4 or later
  If you set CONFIG_MDNS_STRICT_MODE = y in sdkconfig.default, the firmware will be built with MDNS_STRICT_MODE = 1.

TEA5767 Setting

• CONFIG_SCL_GPIO
  GPIO number(IOxx) to SCL.
• CONFIG_SDA_GPIO
  GPIO number(IOxx) to SDA.
• CONFIG_FM_BAND
  In US/EU it ranges from 87.5 MHz to 108 MHz.
  In Japan it ranges from 76 MHz to 91 MHz.
  Used when wrapping in a search.

Wireing

TEA5767		ESP32	ESP32-S2/S3	ESP32-C2/C3/C6
SCL	--	GPIO22	GPIO12	GPIO5	(*1)
SDA	--	GPIO21	GPIO11	GPIO4	(*1)
GND	--	GND	GND	GND
VCC	--	3.3V	3.3V	3.3V	(*2)

(*1)
You can change it to any pin using menuconfig.
But it may not work with other GPIOs.

(*2)
The PCB marking is +5V, but it works at 3.3V.

How to use

• Open browser

• Enter the esp32 address in your browser's address bar

• Search Up
  Search for radio stations upwards.

• Search Down
  Search for radio stations downwards.

• Add Preset
  Record the current radio station in NVS.

• Segment Color
  Change segment color.

• Goto
  Goto preset station.

• As system default
  At boot time, set to this Radio station.

Clear preset

idf.py erase-flash

Reference

https://github.com/nopnop2002/esp-idf-tea5767