Examples

This folder has some examples that might help you to use the Si470X Arduino Library in your receiver project. If you find some error or problem during your implementation, please let me know.

This project is about a library to control the SI4701/02/03 devices and the focus of this project is the library and its functionalities. Please, don’t ask me to assist you in your: displays, encoders, buttons or something else out the library scope. Thanks.

The examples stored in this folder are made to assist you to build your own sketch. Therefore, it is important to say that there was no care with the layout. This part of the project stays with you.

The si470x_01_serial_monitor folder shows how you can check your circuit by using just the Arduino IDE Serial Monitor to control the receiver. Check the examples with Atmega328 and ESP32. In the sketch you will find the wireup with Atmega328 or ESP32 and si470x device.

The si470x_02_TFT_display folder has an example with the traditional Display TFT based on ST7735. In the sketch you will find the wireup with display and si470x device.

The si470x_03_STM32_OLED folder has an example with the traditional OLED I2C display and the breakout board SI3703. In the sketch you will find the wireup with display and si470x device.

Donate

If you find this project useful, consider making a donation so that the author of this library can purchase components and modules for improvements and testing of this library. Click here to donate.

TFT SCHEMATIC

The schematic below shows the receiver example with TFT display, encoder and push buttons.

schematic with TFT, push buttons and encoder

In general, the SI4703 device is already sold in kit or shield format. So, the circuit above can help you to connect the arduino to the shield. In this case, you will not need the crystal, pull up resistors and audio jack output. Also, the labels will guide you. The table bellow shows the connections.

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

Device name	Device Pin / Description	Arduino Pin
Display TFT
	RST (RESET)	8
	RS or DC	9
	CS or SS	10
	SDI or SDA or DATA	11
	CLK	13
Si470X
	RESET (pin 5)	14 / A0
	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)	12
Encoder
	A	2
	B	3

ATtiny84 Schematic

schematic Attiny84, buttons and encoder

ATtiny84 and Si470X wireup

Si470x pin	Attiny84 REF pin	Physical pin
RESET /RST	7	6
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

Attiny85 Schematic

schematic Attiny85 and buttons

ATtiny85 and Si470X wireup

Si470x pin	Attiny85 REF pin	Physical pin
RESET /RST	PB3	2
SEEK_UP	PB1	6
SEEK_DOWN	PB4	3
SDIO / SDA	SDA	5
SCLK / CLK	SCL	7

SI470X

It is an Arduino Library for the SI4702 and SI4703, BROADCAST RECEIVER.