SI4732 full-band DSP radio｜ESP32-S3 global Internet radio two-in-one portable receiver

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Dual-core professional solution, taking into account local shortwave and global network radio stations

Radio chip: SI4732 professional DSP broadcast chip

The industry's mainstream high-performance radio solution fully covers the broadcast frequency bands: long wave LW, medium wave MW,
Shortwave SW, FM, aviation VHF frequency bands; built-in hardware DSP noise reduction, AGC automatic gain, synchronous detection, lower noise floor for weak signals, and strong anti-interference ability for long-distance reception.

Main control chip: ESP32-S3 WiFi Bluetooth dual-mode main control

Equipped with a high-speed WiFi module, you can access the global Internet radio library through the Internet; it has built-in Bluetooth function and supports
Supports Bluetooth audio output; the computing power smoothly drives the color spectrum UI, clock, radio collection, and scheduled sleep, and the firmware can be continuously upgraded and optimized.

Body hardware configuration

High-definition color TFT spectrum display: real-time display of frequency MHz, RSSI signal strength, SNR signal-to-noise ratio, time and date, spectrum waveform, bandwidth/squelch/step parameters;

Large red aluminum alloy knurled knob: integrated control of FM, volume, and menu switching, with smooth damping and a clear feel for outdoor blind operation;

Standard SMA external antenna interface: can be freely expanded with rod antenna, loop shortwave antenna, and portable short antenna;

Built-in lithium battery + Type-C charging: Portable for outdoor use without the power cord, long-lasting battery life;
The one-piece matte metal shell is mini-sized in the palm of your hand and can be carried in your pocket, making it easy to carry around outdoors without any burden.

Detailed explanation of dual-mode core functions

SI4732 local hardware full-band radio (available when the network is disconnected)

Full coverage of all frequency bands: daily FM city FM, medium wave news, overseas shortwave radio stations, aviation tower VHF signals are covered by one machine, and it is suitable for beginners of radio, amateur listening, and daily radio listening.

Professional adjustable radio parameters:

• STEP frequency step customization (5/10/15/20KHz)
• BW receiving bandwidth automatic/manual switching, narrow bandwidth filtering electromagnetic interference
• AGC automatic gain switch, SM synchronous detection, SQ squelch threshold adjustment, suitable for different listening environments
• Visual spectrum assisted station search: Dynamic spectrum bar at the bottom of the screen, intuitive visualization of signal strength, quick locking of weak stations outdoors, more efficient than traditional digital radios to find stations.
• Real-time signal monitoring: The interface displays the RSSI received signal strength and SNR signal-to-noise ratio in real time, making it easy to adjust the antenna placement and optimize the outdoor reception effect.

ESP32 WiFi Internet Radio (listen to global radio online)

After connecting to WiFi, you can access a massive global online radio station library. There are no geographical restrictions on domestic and foreign broadcasts, so you can listen to special programs from various places without leaving home;

Supports radio station classification retrieval, collection of commonly used channels, and one-click retrieval without repeated searches;

The time is automatically synchronized when connected to the Internet, and the day, date, hour and minute are displayed in real time at the top of the screen;

It supports scheduled automatic sleep, so you don’t need to get up and shut down the phone to listen to the radio before going to bed.

Screen UI interaction & operation experience

Section title: Full-color visual operation interface, single-knob minimalist control

Large color screen layered UI: top status bar (WiFi, time, week, number of stored radio stations), large font frequency value in the middle, signal parameter area on the right, and dynamic spectrum waveform at the bottom;

Single knob logic: short press to switch mode/menu, rotate to adjust frequency/volume, long press to favorite radio stations, novices can get started quickly;

Large-capacity radio station memory: supports multiple sets of commonly used radio stations to be saved with one click, and can be retrieved quickly at startup without repeated station searches;

Red and blue contrasting body design: matte black host + red metal knobs, the screen text is clear and non-reflective under strong outdoor light.

Complete machine specifications and kit accessories list

Main control chip: ESP32-S3 WiFi Bluetooth dual-mode main control

Radio chip: SI4732 DSP full-band radio chip

Display: Color TFT dynamic spectrum screen

Radio band: 9.9KHz~181MHz LW/MW/SW/FM/VHF aviation full frequency band

Antenna interface: standard SMA female socket, compatible with various shortwave/FM antennas

Power supply and battery life: built-in lithium battery, Type-C charging, pure radio battery life of 6-10 hours

Control parts: red aluminum alloy knurled stepless knob

Body size: mini and portable in the palm of your hand, can be carried in your pocket

Working mode: local hardware radio / WiFi Internet radio two-in-one