Forum >Replies by bam
Replies （3）
- You Reply: Hello Leff,
Operating voltage is 4.6 - 5V
I use 1K resistance at TX and RX pins, but I listen "murmur" at low volume or where volume is "0".
I tried to use different arduino modules (nano, mega, uno, original\chines) and different DFPlayer mini modules with next code:Code: Select all#include <DFPlayer_Mini_Mp3.h>
#define MP3_RX 8
#define MP3_TX 9
SoftwareSerial mp3_serial = SoftwareSerial(MP3_TX, MP3_RX); // RX, TX mp3
void setup() {
mp3_serial.begin(9600);
mp3_set_serial(mp3_serial);
delay(100);
mp3_set_volume(10);
delay(100);
mp3_play(800); // or mp3_next();
delay(100);
}
void loop() {
}
, but result is same.
P.s. Sorry for my bad english. - You Reply: Hello Leff,
Operating voltage is 4.6 - 5V
I use 1K resistance at TX and RX pins, but I listen "murmur" at low volume or where volume is "0".
I tried to use different arduino modules (nano, mega, uno, original\chines) and different DFPlayer mini modules with next code:Code: Select all#include <DFPlayer_Mini_Mp3.h>
#define MP3_RX 8
#define MP3_TX 9
SoftwareSerial mp3_serial = SoftwareSerial(MP3_TX, MP3_RX); // RX, TX mp3
void setup() {
mp3_serial.begin(9600);
mp3_set_serial(mp3_serial);
delay(100);
mp3_set_volume(10);
delay(100);
mp3_play(800); // or mp3_next();
delay(100);
}
void loop() {
}
, but result is same.
P.s. Sorry for my bad english. - You Reply: Hello, I connect 1k resistors between the arduino module and MP3 rx/tx, but noise (murmur) is going on.
I cheked 4 differnt dfplayer mini and have the same problem. Any ideas about solve this problem?Q 1. When Arduino send command to DFPlayer mini, the speaker will murmur, seems like noise, how to deal with it?
A: Plz connect a 1k resistor between the module and MP3 on TX-RX and RX-TX.Because DFPlayer Mini Module operating voltage is 3.3V.