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https://github.com/mathertel/Radio

An Arduino library to control FM radio chips like SI4703, SI4705, RDA5807M, TEA5767.
https://github.com/mathertel/Radio

arduino arduino-library fm fm-radio-chips radio rda5807m si4703 si4705 tea5767

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An Arduino library to control FM radio chips like SI4703, SI4705, RDA5807M, TEA5767.

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README 

        
# Radio Library Overview



[![Build Examples for ESP8266](https://github.com/mathertel/Radio/actions/workflows/buildESP8266.yml/badge.svg)](https://github.com/mathertel/Radio/actions/workflows/buildESP8266.yml)



This library is about controlling an FM radio chips by using an Arduino, ESP8266 or ESP32 board

and some optional components like a LCD display, a rotary encoder, a LCD+Keyboard shield

or an Ethernet Shield to build a standalone radio.



In the [github.com/mathertel/Radio](https://github.com/mathertel/Radio) repository on github.com you find an Arduino library for implementing an FM receiver using one of the supported radio chips for receiving FM broadcast audio signals.



There are various examples included that show using the library using different hardware setups.



The library is working for many boards like Arduino, Arduino Mega, ESP8266, ESP32 and maybe more.



See also the [Changelog](CHANGELOG.md).



## Documentation



The API documentation for the libraries in DOXYGEN style can be found at [http://mathertel.github.io/Radio/html](html/index.html).



A more detailed article is available at [www.mathertel.de/Arduino/RadioLibrary.aspx](http://www.mathertel.de/Arduino/RadioLibrary.aspx).



Currently the following radio receiver chips are supported:



* The **RDA5807M** and **RDA5807FP** with I2S support from RDA Microelectronics

* The **SI4703** from Silicon Labs, now Skyworks

* The **SI4705** from Silicon Labs, now Skyworks

* The **SI4721** and **SI4730** chips  from Silicon Labs, now Skyworks

* The **TEA5767** from NXP



They all are capable for receiving FM radio stations in stereo with European and US settings and can be controlled by using the I2C bus. However there are differences in the sensitivity and quality and well on receiving RDS information from the stations.



For each of these chips a specific library is implemented that knows how to communicate with the chip using the I2C bus and the wire library. These libraries all share a common base, the radio library so that all the common code is only implemented once in there:



All the libraries share the same interface (defined by the radio library) so it is possible to exchange them when not using one of the chip specific functions.



Currently the following radio transmitter chips are supported:



* The **SI4721** from Silicon Labs, now Skyworks



## Contributions



Contributions to the library like features, fixes and support of other chips and boards are welcome using Pull Requests.



Please don't ask general programming questions in this project.

Radio chip specific questions may be answered by the community (or not) and are closed after some months of inactivity.



## Examples



Within the Arduino library you can find examples that implement different scenarios to control various radio chips.



The basic examples only startup the chips and set a static station and volume:LCDKeypadRadio



* **TestRDA5807M** to test the RDA5807M chip. 

* **TestSI4703** to test the SI4703 chip.

* **TestSI47xx** to test the SI4705, SI4721 and SI4730 chips.

* **TestTEA5767** to test the TEA5767 chip.

* **TransmitSI4721** to test transmission mode of SI4721 chip.



The examples can be used with several chips and boards:



* The **SerialRadio** example doesn't need extra inputs as it

  uses the Serial in- and output to change the settings and report information.

  This example can be used with Arduino, ESP8266 and ESP32.



* The **LCDRadio** example is similar to SerialRadio but also populates some information to an attached LCD.

  This example can be used with Arduino, ESP8266 and ESP32.



* The **ScanRadio** is similar to the SerialRadio example

  and includes some experimental scanning approaches.

  This example can be used with Arduino, ESP8266 and ESP32.



* The **LCDKeypadRadio** example uses the popular LCDKeypad shield for **Arduino UNO** only.



* The **WebRadio** example is the most advanced radio that runs on an **Arduino Mega** with an Ethernet Shield and an rotator encoder.

  You can also control the radio by using a web site that is available on the Arduino.



The only sending example for the SI4721 chip can be found in **TransmitSI4721**.