ESP-32S sur Ardino nano

[dfr68820]

**Hello everyone,**

I am new to your forum and also new to Arduino. I have used a SI4713 module (stereo FM transmitter, RDS) and connected it to an Arduino Nano board. I wrote the code that, with the help of a display and four control buttons, allows me to display and program the operating frequency, audio level, preset safety power (Rfl) to put the transmitter into safety mode in case of antenna failure, display transmitted power, and lock the settings to prevent unauthorized changes. All of this currently runs on 5V.

I plan to collect the text file containing all the song details that is currently being broadcast, just like in radios, to integrate it into my Arduino Nano code from the broadcasting software (ZARARADIO). For this, I bought an ESP32S board to establish a connection between it and my Nano board via the TX/RX pins of each board. However, I noticed that the module has a mini USB port and a 5V pin on pin 19. I tried connecting 5V to this port, and the module works. Therefore, I suspect that the ESP32S has a 3.3V regulator.

**My question:** To ensure proper communication between the two modules (Arduino Nano and ESP32S), both modules need to be powered correctly. Do you know if running this module at 5V instead of 3.3V could potentially damage it?

Thanks for your answers.

• This topic was modified 6 months, 1 week ago by Renzo Mischianti. Reason: Correct language of the forum

[Renzo Mischianti]

Hi,
it’s correct, you need a logic level converter or simply a voltage divider from tx of Arduino and rx of esp32.

Here a simple connection with a voltage divider

Remote WiFi debugging on Arduino Using ESP8266 (NodeMCU and ESP01) with ESP-LINK Firmware

Bye Renzo

[dfr68820]

Voici une photo de ma toile d’araignée

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