Canbus over Wifi

Hardware UNO R4 UNO R4 WiFi
1

Hi im sniffing packets from canbus and sending the packets to my phone using Access Point. But its really slow since the vehicle sends out around 600 packets/second and the app only recieves 65packets/second.

I tried cleaning the code which helped a bit, went from 37 > 65 packets/second?

Is this because of my hardware or just by using tcp?

What happens with all the lost packets?

Im using r4wifi & mcp2515

void loop() {
  client = server.available();
  if (client) {
    while (client.connected()) {
      int packetSize = CAN.parsePacket();
      if (packetSize) {
        unsigned long PacketId = CAN.packetId();
        byte buf3[8];
        int i = 0;
        while (i < 8 && CAN.available()) {
          buf3[i] = CAN.read();
          i++;
        }

        // Combine header, ID, and data into canFrameBuffer
        memcpy(canFrameBuffer, RD_FRAME_HEADER, 4);
        memcpy(canFrameBuffer + 4, (const byte*)&PacketId, 4);
        memcpy(canFrameBuffer + 8, (const byte*)buf3, 8);

        // Send the entire CAN frame to client
        client.write(canFrameBuffer, 16);
      }
    }
    client.stop();
    Serial.println("client disconnected");
  }
}
2

Comment out all the CAN stuff and see how many client.write() per second is possible using a dummy 8 byte load.

3

im sending 16 bytes in total per can bus message because i have to send 4 bytes as a header for the app on the phone to accept it.

4

Send dummy packets using whatever length is necessary for your app. That will tell you the theoretical maximum throughput.

5

Hi chrisisbrown, may I ask you which CAN library are you using with Arduino R4 WIFI? Thanks a lot for your help in advance and have a great day.
Andrea