TEA5767 FM Stereo Radio Driver for esp-idf.

I ported from here.

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.

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 as extended antena.

git clone https://github.com/nopnop2002/esp-idf-tea5767
cd esp-idf-tea5767
idf.py set-target {esp32/esp32s2/esp32s3/esp32c2/esp32c3/esp32c6}
idf.py menuconfig
idf.py flash

• 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.

(*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.

Refer to tea5767.h.

• Search radio station
  Press the + key to search for radio stations upwards.
  Press the - key to search for radio stations downwards.

• Preset radio station
  Press the * key to record the current radio station in NVS.
  At boot time, it read from NVS and set to the current Radio station.

• Change frequence
  Press the D key to decrease the frequence by -1.0Mhz.
  Press the U key to increase the frequence by +1.0Mhz.
  Press the d key to decrease the frequence by -0.1Mhz.
  Press the u key to increase the frequence by +0.1Mhz.

• Clear preset
  idf.py erase-flash

https://github.com/nopnop2002/esp-idf-fm-radio