Tuesday, June 30, 2015

Making Yun WiFi connection stable

I trying the following scheme to ensure the stable WiFi connection with Yun device.

1. on connection failure : reboot Yun (WiFi core)
2. set the bridge started variable to 0
3. begin the bridge again

bridge lib change :

extern Serial_ Serial;

void BridgeClass::begin() {
  char c;
 
  if (started) {
    uint8_t quit_cmd[] = {'X', 'X', 'X', 'X', 'X'};
    max_retries = 1;
    transfer(quit_cmd, 5);
   
    stream.print(CTRL_C);
    delay(250);
   
    stream.println("boot");        //in case we are in the bootloader
    stream.println("reboot");    //in case we are in the shell
  }
   
  started = true;

  stream.setTimeout(5000);
 
  // Wait for U-boot to finish startup
  while(stream.readBytes(&c, 1)) Serial.print(c);
 
  stream.setTimeout(1000);

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