RDA5807 Arduino Library

It is a cross-platform Arduino Library for RDA5807. You can use it with official Arduino boards, ATtiny, STM32 , ESP32 and more. It works with I2C protocol and can provide you an easier interface to control the RDA5807 device. This library was built based on "RDA5807M - SINGLE-CHIP BROADCAST FM RADIO TUNER - Rev.1.1–Aug.2015"

This library can be freely distributed using the MIT Free Software model.

Contact: pu2clr@gmail.com.

Attention

The RDA5807 device can work safaty from 2.7 to 3.3V. Be aware that some Arduino board oparates with 5V instead of 3.3V (for example: Arduino Uno and Arduino Nano). A wrong setup can make the system unstable or damage the RDA5807 device. Preferably use an Arduino or other boards like ESP32 and ESP8266 that work with 3.3V voltage. If you are not using a 3.3V version of board, you must use a kind of 5V to 3.3V converter to feed the RDA5807 device and to send signal to SCLK and SDIO/SDA pins. In my experiments, I used an Arduino Nano (5V) and fed the RDA5807 with 3.3V (from the Nano. See the Pin 3.3V of the Arduino). It has worked. However, this is at your own risk.

Preface

The RDA5807 is a FM DSP integrated circuit receiver (50 to 115MHz) with low noise amplifier support. This device requires very few external components if compared with other similar devices. It also supports RDS/RBDS functionalities, direct auto gain control (AGC) and real time adaptive noise cancellation function. The PU2CLR RDA5807 Arduino Library was developed to take the most functionalities of this device. Plese, check the API Documentation for more details.

{% include video01.html %}

See the presentation video on youtube

{% include video02.html %}

See RDS and TFT Display example - youtube

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See RDS and Nokia 5110 Display example - youtube

You can buy the RDA5807 device on AliExpress, eBay, Amazon etc. You will find two types of RDA5807: The RDA5807MS (breakout) and RDA5807FP (standalone IC).

RDA5807MS breakout

The photo below shows a Breakout that uses the RDA5807MS.

RDA5807FP standalone IC

If you are using the standalone RDA5807FP you must add some parts to make it work. In my opinion, there is no big reasons to use the RDA5807FP instead of the RDA5807MS breakout. I think the most important thing is the possibility to use the digital audio configuration via I2S protocol. This library has function to deal with I2S.

RDA5807FP PINOUT

PIN	Label	Description
1	GPIO1	General purpose input/output (Stereo indicator, interrupt etc)
2	GND_1	Ground. Must be connected to ground
3	RFGND	RF Ground. Must be connected to the ground or a special RF ground
4	FMIN	FM signal imput - Antenna
5	GND_2	Ground. Must be connected to ground
6	GND_3	Ground. Must be connected to ground
7	SCLK	I2C clock
8	SDA	I2C SDA/SDIO
9	RCLK	32.768kHz pasive crystal
10	VDD	3.3V power supply
11	GND_4	Ground. Must be connected to ground
12	ROUT	Right audio output
13	LOUT	Left audio output
14	GND_5	Ground. Must be connected to ground
15	GPIO3	General purpose input/output
16	GPIO2	General purpose input/output

The two photos below show the standalone RDA5807FP IC mounted on a homebrew board.

The schematic below shows the basic RDA5807FP setup.

Components	Value
R1	1K
R2	1K
R3	8 ~ 12K
R4	8 ~ 12K
C1	1nF (FMIN)
C2 and C3	4,7 ~ 10uF tantalum capacitor (stereo audio output)
Q1	32768 kHz passive crystal occilator
J1	Audio stereo jack

The RDA5807FP on an Arduino Uno adapter

The photos below show the RDA5807FP setup on a Arduino Uno board adapter.

{% include video04.html %}

See the presentation video on youtube

RDA5807 features implemented by this library

76–108 MHz
Seek tuning
Automatic frequency control (AFC)
Automatic gain control (AGC)
Programmable de-emphasis (50/75 μs)
Adaptive noise suppression
Volume control
Mute control
Mono/Stereo control
RDS/RBDS Processor (under construction)
I2S Digital Audio (RDA5807FP)

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE ARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Library Installation

The easiest method to install this library is via your Arduino IDE. All you have to do is:

Select Tools menu;
Select Manage Libraries option;
In the text box (top windows), type PU2CLR or RDA5807;
Select the PU2CLR RDA5807.

The images below show how you can install this library via your Arduino IDE from Manage Libraries tool.

Installing via the repository

With this approach, you will have the most current version of the library. However, it may not be the most stable version. This is because the current version is always in development. Prefer releases. Do you need some old version (release) of this library? If yes, check here.

First, you have to download this library in zip format.
After, unzip the RDA5807-master.zip file in your Arduino Library folder.

On Windows: "My Documents\Arduino\libraries"
On MAC OS: ˜/Documents/Arduino/libraries
On Linux: ˜/home/Arduino/libraries

Installing the most current version via arduino-cli

The commands below Install the latest version of the PU2CLR RDA5807 Arduino Library from github. As said before, unlike a release (installed from Arduino IDE) this method installs the current version of the PU2CLR RDA5807 Arduino Library (latest modifications even if not yet released).

On macOS or Linux

curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | sh
export ARDUINO_LIBRARY_ENABLE_UNSAFE_INSTALL=true
./bin/arduino-cli lib install --git-url https://github.com/pu2clr/RDA5807

On Windows 10 or 11

Run the command shell (cmd / Command Prompt) and follow the steps below.

echo off  
curl -fsSL https://downloads.arduino.cc/arduino-cli/arduino-cli_latest_Windows_64bit.zip --output arduinocli.zip
tar -xf arduinocli.zip 
set ARDUINO_LIBRARY_ENABLE_UNSAFE_INSTALL=true
.\arduino-cli lib install --git-url https://github.com/pu2clr/RDA5807

Schematic

In general, the RDA5807 can be found in kit or breakout form. In this case, the circuit below can help you to connect the arduino to the RDA5807 shield. If you are using just the IC, you might want to check the RDA5807M - SINGLE-CHIP BROADCAST FM RADIO TUNER - Rev.1.1–Aug.2015; page 17.

Wire up on Arduino UNO, Pro mini or other based on ATmega 328.

RDA5807 / Description	Arduino Pin
VCC	3.3V
SDA / SDIO	A4
SCL / SCLK	A5

Wire up on Arduino, TFT7735 display and Push Buttons.

Device name	Device Pin / Description	Arduino Pin
Display TFT
	RST (RESET)	8
	RS or DC	9
	CS or SS	10
	SDI	11
	CLK	13
RDA5807
	VCC	3.3V
	SDIO (pin 8)	A4
	SCLK (pin 7)	A5
Buttons
	Volume Up	4
	Volume Down	5
	Stereo/Mono	6
	RDS ON/off	7
	SEEK (encoder button)	A0/14
Encoder
	A	2
	B	3

RDA5807 breakout, ATtiny84, Encoder and Buttons schematic

RDA5807 breakout, ATtiny84, Encoder and Buttons wireup

RDA5807 pin	Attiny84 REF pin	Physical pin
SEEK_UP	3	10
SEEK_DOWN	5	8
ENCODER_PIN_A	0	13
ENCODER_PIN_B	1	12
SDIO / SDA	SDA	7
SCLK / CLK	SCL	9

RDA5807 breakout, Arduino Nano and Nokia 5110 display wireup

Device name	Nokia 5110	Arduino
NOKIA 5110	Pin function	Nano Pin
	(1) RST (RESET)	8
	(2) CE or CS	9
	(3) DC or DO	10
	(4) DIN or DI or MOSI	11
	(5) CLK	13
	(6) VCC (3V-5V)	+VCC
	(7) BL/DL/LIGHT	+VCC
	(8) GND	GND
--------------------------	-------------------------	--------------
RDA5807	Pin Function
	VCC	3.3V
	SDIO (pin 8)	A4
	SCLK (pin 7)	A5
--------------------------	--------------------------	--------------
Buttons
	Volume Up	4
	Volume Down	5
	Stereo/Mono	6
	RDS ON/off	7
	SEEK (encoder button)	A0/14
--------------------------	--------------------------	---------------
Encoder
	A	2
	B	3

Arduino Nano, RDA5807 and Nokia 5110 setup on Breadboard

RDA5807 breakout, Arduino Nano and LCD16X02 display wireup

Device name	Device Pin / Description	Arduino Pin
LCD 16x2 or 20x4
	D4	D7
	D5	D6
	D6	D5
	D7	D4
	RS	D12
	E/ENA	D13
	RW & VSS & K (16)	GND
	A (15) & VDD	+Vcc
--------------------------	-------------------------	--------------
RDA5807
	VCC	3.3V
	SDIO (pin 8)	A4
	SCLK (pin 7)	A5
--------------------------	--------------------------	--------------
Buttons
	Volume Up	8
	Volume Down	9
	Stereo/Mono	10
	RDS ON/off	11
	SEEK (encoder button)	D14/A0
--------------------------	--------------------------	---------------
Encoder
	A	2
	B	3

RDA5807FP setup, ESP32 and LCD16X02 display wireup

Wire up ESP32 Dev Module, RDA5807 and LCD16x02 or LCD16x04

Device name	Device Pin / Description	Arduino Pin
LCD 16x2 or 20x4
	D4	GPIO18
	D5	GPIO17
	D6	GPIO16
	D7	GPIO15
	RS	GPIO19
	E/ENA	GPIO23
	RW & VSS & K (16)	GND
	A (15) & VDD	+Vcc
--------------------------	-------------------------	--------------
RDA5807FP (See schematic)
	VCC	3.3V
	SDIO / SDA (pin 8)	GPIO21
	SCLK (pin 7)	GPIO22
Buttons
	Volume Up	GPIO32
	Volume Down	GPIO33
	Stereo/Mono	GPIO25
	RDS On/Off	GPIO26
--------------------------	--------------------------	--------------
Encoder
	A	GPIO13
	B	GPIO14
	PUSH BUTTON (encoder)	GPIO27

ATTENTION: Be guided by the ESP32 IO/GPIO pins.

Thanks

I would like to thanks to Dimitri, F5SWB, for sharing his project based on RDA5807 (RDA5807 fm chipset / arduino with a Nextion screen F5SWB@2021 / Version 1.18). See RDA5807

TO DO

RDS Improvments;
Example using OLED;
Check the functions/methods to deal with I2S (RDA5807FP);
Fix the problem with 200 kHz frequency step

More Arduino Projects developed by author

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nunesson/RDA5807