Send Failed Question - Githubissues

atestani commented 1 week ago

I am working on a custom ESP32-wroom-E32 board and am getting Send Failed errors after a delay depending on the size of the buffer I create. At the moment I am using the Battery Monitor example with everything as default except my CAN pins which are declared before the includes. I am sure I have TXD/RXD for the ISO1050 transceiver I am using and that the bus is terminated properly and CANH and CANL are connected properly. Everything looks OK electrically in that I can see what look like good CANL and CANH signals on an oscilloscope. At this point I am out of ideas for why my messages are not being sent.

I understand I need to have another device on the bus or the buffer will fill up due to unsent messages. Question: Is having an Actisense NGT1 enough as a device on the bus in addition to my own? The NGT1 is not showing any activity from my device.

atestani commented 1 week ago

Some additional information: Includes look like this:

#include <Arduino.h>
#define ESP32_CAN_TX_PIN GPIO_NUM_5
#define ESP32_CAN_RX_PIN GPIO_NUM_4
#include "NMEA2000_CAN.h"       // This will automatically choose right CAN library and create suitable NMEA2000 object
#include "N2kMessages.h"

I added this to see if the NMEA2000.Open() worked:

  Serial.print("NMEA2000.Open returned: ");
  Serial.println(NMEA2000.Open());

and the result is: NMEA2000.Open returned: CAN device ready

Here is the start of the serial monitor trace:

Start address claim for device 0
1553 : Pri:6 PGN:60928 Source:25 Dest:255 Len:8 Data:1,0,C0,FF,0,AA,46,C0
2054 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1
2064 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF
2074 : Pri:6 PGN:127513 Source:25 Dest:255 Len:8 Data:1,D1,1,A4,1,35,7D,4B
3554 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1
3564 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF
5054 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1
5064 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF
6554 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1
6564 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF
7074 : Pri:6 PGN:127513 Source:25 Dest:255 Len:8 Data:1,D1,1,A4,1,35,7D,4B
8054 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1
8064 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF
9554 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1
9564 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF
11054 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1
11064 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF
11554 : Pri:7 PGN:126993 Source:25 Dest:255 Len:8 Data:60,EA,0,FF,FF,FF,FF,FF
12074 : Pri:6 PGN:127513 Source:25 Dest:255 Len:8 Data:1,D1,1,A4,1,35,7D,4B
12554 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1

and when it starts failing it looks like this:

84564 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF
PGN 127508 send failed
86054 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1
PGN 127506, frame:0/2 send failed
86064 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF
PGN 127513, frame:0/2 send failed
87074 : Pri:6 PGN:127513 Source:25 Dest:255 Len:8 Data:1,D1,1,A4,1,35,7D,4B
PGN 127508 send failed
87554 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1
PGN 127506, frame:0/2 send failed
87564 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF
PGN 127508 send failed
89054 : Pri:6 PGN:127508 Source:25 Dest:255 Len:8 Data:1,6B,5,33,0,B8,D,1
PGN 127506, frame:0/2 send failed
89064 : Pri:6 PGN:127506 Source:25 Dest:255 Len:11 Data:1,1,0,38,5C,82,2,C,0,FF,FF

atestani commented 1 week ago

FWIW, Here is a scope trace: 20240707_215216

ttlappalainen commented 1 week ago

You need to triple check:

CANL/CANH order
Bus termination, for short test at least one 120 ohm termination resistor. Prefered two.
You must have at least one other device on the bus.
Check that bus is powered or other devices powers completely from external source. E.g., NGT-1 and many MFD:s requires that bus is powered with 12V.

atestani commented 1 week ago

Does the NGT-1 count as the other device on the bus?

On Sun, Jul 7, 2024 at 11:54 PM Timo Lappalainen @.***> wrote:

You need to triple check:

CANL/CANH order

Bus termination, for short test at least one 120 ohm termination resistor. Prefered two.

You must have at least one other device on the bus.

Check that bus is powered or other devices powers completely from external source. E.g., NGT-1 and many MFD:s requires that bus is powered with 12V.

— Reply to this email directly, view it on GitHub https://github.com/ttlappalainen/NMEA2000/issues/411#issuecomment-2212955609, or unsubscribe https://github.com/notifications/unsubscribe-auth/AA2MD74XJFMSOF5UPTCJCG3ZLIEPDAVCNFSM6AAAAABKP3XQMSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDEMJSHE2TKNRQHE . You are receiving this because you authored the thread.Message ID: @.***>

ttlappalainen commented 1 week ago

Yes.

atestani commented 1 week ago

I am embarrassed to say how I fixed the problem. When I went to check the bus power at 12V, I found that the NGT-1 was not connected to the bus!!! When I connected it, it all works fine now.

Very sorry for the confusion!

ttlappalainen / NMEA2000

Send Failed Question #411