Trouble with more than two servo inputs

[savall21]

I have three servo inputs connected. Each one works individually. However, when all three are connected one of them always fails to work properly. I have three switch channels connected from channels 4, 5 & 6. Chanel six is a momentary switch, channel 5 is three position and channel four is a two position. Channels 4 and 6 work flawlessly. If I plug in channel 5 then it only reads position 2 & 3. Also, when channel 5 is plugged in channel 6 works intermittently.

I'm using an Arduino Nano Every with Ch 6 on pin 12, Ch 5 on pin 8 and Ch 4 on pin 10. The ground is connected to pin 29. Code:

#include <SoftwareSerial.h>
#include <ServoInput.h>
//Setup mappings for receiver channels- each channel is mapped to a channel on the transmitter
ServoInputPin<12> ch6; //momentary switch
ServoInputPin<8> ch5;  //three position switch
ServoInputPin<10> ch4;  //two position switch
const int MT = 2;
const int Three = 3; 
int sound_clip = 1;

SoftwareSerial mySerial(2, 1); // RX, TX... Nano Every Tx=1  Rx=2

void sendCmd(int cmd, int lb, int hb, bool reply = false)
{ // standard format for module command stream
uint8_t buf[] = {0x7E, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0xEF};
int16_t chksum = 0;
int idx = 3; // position of first command byte

buf[idx++] = (uint8_t)cmd; // inject command byte in buffer
if (reply) buf[idx++] = 0x01;
else buf[idx++] = 0x00;// set if reply is needed/wanted
if (hb >= 0) // if there is a high byte data field
buf[idx++] = (uint8_t)hb; // add it to the buffer
if (lb >= 0) // if there is a low byte data field
buf[idx++] = (uint8_t)lb; // add it to the buffer
buf[2] = idx - 1; // inject command length into buffer
buf[idx++] = 0xEF; // place end-of-command byte

mySerial.write(buf, idx); // send the command to module
// for (int i = 0; i < idx; i++) // send command as hex string to MCU
// Serial.printf("%02X ", buf[i]);
// Serial.println();                                                                                                                                                                                                                                                                                                   b
}

void setup()
{

Serial.begin(115200); //for console debugging
delay(2000); //Allow Serial to start up

Serial.println("starting ");
mySerial.begin(9600); //communicate with DF Player
delay(3000); //Allow SoftwareSerial to start up

Serial.println("Stop anything playing"); //in case anything is already playing on reset
sendCmd(0x0E, 0, 0, false);
delay(200); //give a delay for the DF Player to execute the command

//Serial.println("Now volume ");
sendCmd(6, 30, 0, false); //command code can be in decimal too.

//Serial.println("Starting Player");
//sendCmd(0x01, 0, 0, false); // Send a "next track" command that turns play mode on
delay(1000);
Serial.println("_____________________________________");

}

void loop()
{
 //Momentary Switch Channel 6 HS - Play sound
int channel6 = ch6.map(1, MT);
//Serial.println(channel6); //Debugging to read the channel

if (channel6 == 2){
  Serial.print("Sound Activated");
  delay(300);
  play_sound();
}

//Three position switch Channel 5 SE - Select up scanner sound; middle no sound; down turbo boost
int channel5 = ch5.map(1, Three);
//Serial.println(channel5); //Debugging line for channel5
 if (channel5 == 3){
  delay(500);
  Serial.println("Turbo Boost");
  sound_clip = 6;
  }

if (channel5 == 2){
  delay(500);
  Serial.println("Scanner");
  sound_clip = 4;
  }

//Two position switch Chanel 4 SF - Select Sound
int channel4 = ch4.map(1, MT);
if (channel4 == 2){
  delay(500);
  sound_clip = sound_clip + 1; //Increase the number of the selected sound file up to 16 and then reset to 1
    if (sound_clip > 16){
      sound_clip = 1;
    }
  Serial.println("Sound select change");
  Serial.print("Selected sound:");
  Serial.println(sound_clip);
  delay(300);
  }
}

void play_sound() //Subroutine to play the selected sound file
{
  Serial.println("Play sound ");
  Serial.print(sound_clip);
  sendCmd(0x0F, sound_clip, 1, false); //play selected track in folder 01
  delay(200);
  Serial.println(" ");
}

Its a great library though! Any help is appreciated.

[dmadison]

Hello, sorry to hear you're having issues.

What does your wiring setup look like? Have you tried using different pins for the channel inputs?

I see that you're using software serial. Do you have the same issues if you remove the software serial code?

[savall21]

I'm using basic jumpers on a breadboard. I tried swapping the ones on the receiver out with no change. I need software serial to control the DFPlayer Mini.

[dmadison]

I need software serial to control the DFPlayer Mini.

I understand that, but software serial may be interfering with the library. For debugging purposes do you have the same issues if you remove the software serial library from the code?

[savall21]

I swapped the channel and the switch. It's working now. Thanks for the help!