lookbackdemoESP32：I only can read the receiveFrameCount and the sentFrameCount, Can not read and send the data[],why . Can any one give a sample about to sent data and receive data. thanks

[giu-wxyao]

void loop () {
CANMessage frame_rx;
CANMessage frame_tx;
frame_tx.len = 8;
frame_tx.ext = false;
frame_tx.rtr = false;
frame_tx.idx = 0;
frame_tx.id = 0x12;

if (gBlinkLedDate < millis ()) {
gBlinkLedDate += 2000 ;
digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ;
const bool ok = can.tryToSend (frame_tx) ;
if (ok) {
gSentFrameCount += 1 ;
Serial.print ("Sent: ") ;
Serial.println (gSentFrameCount) ;
}else{
Serial.println ("Send failure") ;
}
}
if (can.available ()) {
can.receive (frame_rx) ;
gReceivedFrameCount ++ ;
Serial.print ("Received: ") ;
Serial.println (gReceivedFrameCount) ;
Serial.println (frame.data[0]) ;
Serial.println (frame.data[1]) ;
Serial.println (frame.data[2]) ;
Serial.println (frame.data[3]) ;
Serial.println (frame.data[4]) ;

}
}

[pierremolinaro]

I think you read frame object, but you receive frame_rx. Can you try with:

Serial.println (frame_rx.data[0]) ; Serial.println (frame_rx.data[1]) ; Serial.println (frame_rx.data[2]) ; Serial.println (frame_rx.data[3]) ; Serial.println (frame_rx.data[4]) ;

Pierre

…

Le 23 mai 2020 à 15:30, giu-wxyao ***@***.***> a écrit : void loop () { CANMessage frame_rx; CANMessage frame_tx; frame_tx.len = 8; frame_tx.ext = false; frame_tx.rtr = false; frame_tx.idx = 0; frame_tx.id = 0x12; if (gBlinkLedDate < millis ()) { gBlinkLedDate += 2000 ; digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ; const bool ok = can.tryToSend (frame_tx) ; if (ok) { gSentFrameCount += 1 ; Serial.print ("Sent: ") ; Serial.println (gSentFrameCount) ; }else{ Serial.println ("Send failure") ; } } if (can.available ()) { can.receive (frame_rx) ; gReceivedFrameCount ++ ; Serial.print ("Received: ") ; Serial.println (gReceivedFrameCount) ; Serial.println (frame.data[0]) ; Serial.println (frame.data[1]) ; Serial.println (frame.data[2]) ; Serial.println (frame.data[3]) ; Serial.println (frame.data[4]) ; } } — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#17>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEWKZVBXS6HKJ5L5HJ2776DRS7FV5ANCNFSM4NIOKHIQ>.

[giu-wxyao]

thanks， frame object ,this is my mistake. i changed arready. but still only can read receiveFrameCount and the sentFrameCount.