Invalid conversion esp32

Using Arduino Programming Questions
1

Hi on esp8266 i have a function that sends messages to other nodes.

struct {
  byte IP[4];
} _EEPROM;

void sendMessage(char command[], IPAddress ip, int port) {
  Udp.beginPacket(ip, port);
  Udp.write(command);
  Udp.endPacket();
  server.send(200, "text/html", "Okay!");
}

sendMessage("NODECOMMAND", _EEPROM.IP, ServerPort); //send message

but when i try the same thing on esp32 i get error,

invalid conversion from 'byte* {aka unsigned char*}' to 'const char*'

what do i have to do differently?

2

Change the offending "char*" to "const char*" ?

3

Im sorry i screwed up. my variables are different. have a look at this error instead please.,

struct {
  char IP[4];
} _EEPROM;

void sendMessage(char command[], IPAddress ip, int port) {
  Udp.beginPacket(ip, port);
  Udp.write(command);
  Udp.endPacket();
  server.send(200, "text/html", "Okay!");
}

sendMessage("NODECOMMAND", _EEPROM.IP, ServerPort); //send message

i have redefined my variable as char but now it complains

conversion from 'char [20]' to 'IPAddress' is ambiguous
4

The error message will also tell you where (e.g. line #) this happens but you did not provide that vital piece of information.

5

Posting all the code as well as all the error message(s) helps greatly too.

I shouldn't have to say that...

6

What happens if you change the line above to:

7

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