Remote Controlled Stereo FM Radio With RDS Using ESP-01

This remote-controlled stereo FM radio integrates digital tuning, wireless connectivity, and visual feedback into a compact, battery-powered system. At the core of the audio reception is the RDA5807M FM stereo module, which tunes into broadcast frequencies and decodes Radio Data System (RDS) data, outputting audio through a 3.5mm stereo connector to standard 32-ohm headphones. The system is controlled by an ESP-01 or ESP-01S microcontroller running code developed in the Arduino IDE, which communicates with the tuner and manages user commands. A 38kHz IR receiver captures signals from a remote control, allowing wireless adjustment of settings. Visual output is handled by a 0.91-inch 128x32 SSD1306 OLED display connected via a standard 4-pin 2.54mm header, providing real-time information such as station frequency and RDS text. Power management is achieved using a 3.7V/500mAh lithium-ion battery charged via a dedicated TP4056 module with a Micro USB interface. To ensure stable power distribution and clean operation across the digital and RF components, a regulated 3.3V output is maintained using an LD1117V33 or AMS1117-3.3 voltage regulator, supported by a filtering network of electrolytic capacitors (220µF and 470µF) and ceramic 100nF and 22nF capacitors to smooth out voltage ripples. Finally, a 75cm SWG#22 wire serves as an external antenna to optimize signal reception for the FM tuner.