Arduino Asked by Johnny Derpp on December 13, 2020
I’m trying to control my arduino with a raspberry pi with python instead of C++ (which I don’t know). I’ve found code to take a string from serial and print it, but instead I’d like to use IRsend to use the code. Unfortunately I’m getting the error invalid conversion from ‘char*’ to ‘uint32_t {aka long unsigned int}’ [-fpermissive]. I know this must be an incredibly dumb question but is there a int() function for uint32_t for arduino C++? that I could set blah=uint32_t(buf) and then use my irsend.sendNEC(buf, 32)? If it’s not painfully obvious, I don’t know C++ and my python isn’t great.
#include <IRremote.h>
char buf[80];
int readline(int readch, char *buffer, int len) {
static int pos = 0;
int rpos;
if (readch > 0) {
switch (readch) {
case 'r': // Ignore CR
break;
case 'n': // Return on new-line
rpos = pos;
pos = 0; // Reset position index ready for next time
return rpos;
default:
if (pos < len-1) {
buffer[pos++] = readch;
buffer[pos] = 0;
}
}
}
return 0;
}
void setup() {
Serial.begin(115200);
}
IRsend irsend;
void loop() {
if (readline(Serial.read(), buf, 80) > 0) {
Serial.print("You entered: >");
Serial.print(buf);
Serial.println("<");
irsend.sendNEC(buf, 32);
}
}
Error:
/home/pi/Desktop/sendIRfromserial2addingir/sendIRfromserial2addingir.ino: 39:27: warning: invalid conversion from 'char*' to 'uint32_t {aka long unsigned int}' [-fpermissive]
irsend.sendNEC(buf, 32);
^
In file included from
/home/pi/Desktop/sendIRfromserial2addingir/sendIRfromserial2addingir.ino:1:0:
/home/pi/Arduino/libraries/IRremote/src/IRremote.h:444:10: note: initializing argument 1 of 'void IRsend::sendNEC(uint32_t, uint8_t, bool)'
void sendNEC(uint32_t data, uint8_t nbits, bool repeat = false);
^~~~~~~`
Instead of
irsend.sendNEC(buf, 32);
cast it to an unsigned int32 type:
irsend.sendNEC((uint32_t) buf, 32);
Correct answer by Michel Keijzers on December 13, 2020
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