Bluetooth flow control

[Juan_Antonio]

I think Android Bluetooth always works at 9600 bauds. In the topic of the previous link, I set the speed of the Bluetooth module to 9600 and then I changed it to 115200, in both cases the image transmission time was the same.

Edit:
I have had the experience of changing the baud rate of the Bluetooth module to 115200 and I observe that it improves the transmission speed.
I can transfer an 800 kB file in 110 seconds at 115200 baud.
Look at these examples:

Bluetooth HC-06 Send/Receive image.jpg file to/from Arduino. SdCard Reader. Text file

3.- Change baud rate in HC-06. AT commands. HC-06 has 9600 bauds by default. Let's change it. We make this connection. Notice that I have now connected the module to terminals 2 and 3 of Arduino. [sdcard4c] We load this sketch: // Juan A. Villalpando // http://kio4.com/arduino/9L2_enviar_archivo_BT.htm #include <SoftwareSerial.h> SoftwareSerial BT(2,3); void setup() { BT.begin(9600); Serial.begin(9600); // BT.begin(115200); // Serial.begin(115200); } void loop(){ if(BT.availabl…

Made with the HC-05 and HC-06 modules.