nrf5340 in extended mode

[saeed mahvis]

hello Sirs

How can I put nrf5340-sdk in to extended mode to transfer 250 bytes of data over BLE radio?

the sample code I am using is Peripheral-uart example code.

[Edvin]

Hello,

I suggest you have a look at the sample found in:

NCS\nrf\samples\bluetooth\throughput,

And look at the configurations in the prj.conf file. 

I am not sure exactly which ones that you need, but I guess you can start by trying to include this chunk:

CONFIG_BT_BUF_ACL_RX_SIZE=251
CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_ATT_PREPARE_COUNT=2
CONFIG_BT_CONN_TX_MAX=10
CONFIG_BT_L2CAP_TX_BUF_COUNT=10
CONFIG_BT_L2CAP_TX_MTU=247
CONFIG_BT_L2CAP_DYNAMIC_CHANNEL=y
CONFIG_BT_CTLR_PHY_2M=y
CONFIG_BT_CTLR_RX_BUFFERS=2
CONFIG_BT_BUF_ACL_TX_COUNT=10
CONFIG_BT_BUF_ACL_TX_SIZE=251
CONFIG_BT_CTLR_DATA_LENGTH_MAX=251

You don't necessarily need the 2M PHY, and the dynamic channel, and some of the others, but I am not sure if you want to send 250 bytes in order to increase throughput, or if you just want to send long packets.

Best regards,

Edvin

[saeed mahvis]

Hello again

I added the above code in the prj.conf file but it had no effect.

Actually I have changed CONFIG_BT_NUS_UART_BUFFER_SIZE from 32 to 256 in autoconf.h and I could send

up to 62 bytes over BLE radio. Any further bytes won't be sent. In this situation fewer bytes can also be sent but 

by adding only one byte to 62 you cant receive any byte. 

[saeed mahvis]

hello 

I should apologize seriously because I had added your suggested code to the wrong file Kconfig.prj

instead of  prj.conf . After correcting, the code worked perfectly and I could send and receive 243 bytes

of data over ble radio.

Thank you very much for your invaluable support. 

[saeed mahvis]

hello 

I could transfer over 200 bytes over BLE by editing the Config file as you said before.

 But when I decreased the baud rate from 115200 to 9600 the BLE transferring function didn't work

for long frame data.

Is this a problem caused by maximum window time in BLE advertising parameters?

How can I correct this issue?

[Edvin]

saeed mahvis said:

 But when I decreased the baud rate from 115200 to 9600 the BLE transferring function didn't work

for long frame data.

How does it not work? Can you describe the symptoms please? It is hard to tell how to correct the issue when I don't know what the issue actually is.

Best regards,

Edvin

[saeed mahvis]

Thank you very much for your immediate reply.

Actually the cause of problem was another hardware device and the BLE device is working very nice.

The problem is caused by serial port of node red program.

Any way thank you very much again.