dev/rfcomm3 cannot allocate memory after sending data(imx8mm mini evk baord)

anilpathrut — Sun, 12 Sep 2021 08:49:51 GMT

Hello Sir,

here i am using imx8mm mini evk board and ESP32 board for bluetooth base data transmission.

i want to do communication between A53 linux and esp32 using bluetooth.

on A53 linux executing below commands

void Bluetooth_Init(Void)
{
system("modprobe moal mod_para=nxp/wifi_mod_para.conf"); //before enabling bluetooth need to Enable WIFI first

delay(1000);

system("hciattach /dev/ttymxc0 any 115200 flow");//Set up Baud Rate with 115200 for bluetooth

delay(500);

system("hciconfig hci0 up");// basic configuration for the bluetooth

delay(500);

system("hciconfig");// basic configuration for the bluetooth

delay(500);

system("rfcomm bind rfcomm3 7C:9E:BD:35:F2:7A");//MAC Address of ESP32 Device

delay(500);

}

after this executing below command for data trnasmission from A53 to ESP32

while(1)

{

system( "echo -n -e 4 > /dev/rfcomm3");

delay(5000);

system( "echo -n -e 3 > /dev/rfcomm3");

delay(5000);

system( "echo -n -e 2 > /dev/rfcomm3");

delay(5000);

}

after this getting error /dev/rfcomm3 cannot allocate memory

i have no idea, why getting this error

is there any missing in above steps

Please suggest why getting error /dev/rfcomm3 cannot allocate memory

Re: dev/rfcomm3 cannot allocate memory after sending data(imx8mm mini evk baord)

igorpadykov — Mon, 13 Sep 2021 08:39:08 GMT

Hi Anil

one can look at similar issues on esp32 forum and post issue there

Best regards
igor