Can Phy be set to 2M when connected to a Windows App?

Hi Remi,

Thank you so much for the response. I am attempting to use those functions in order to set my PHY to 2M mode however I'm not having any luck.

This is the code I'm attempting to use to change the PHY mode.

void BLE_SVC_GAP_Change_PHY(void)
{
 uint8_t TX_PHY, RX_PHY;
 tBleStatus ret = BLE_STATUS_INVALID_PARAMS;
 ret = hci_le_read_phy(BleApplicationContext.BleApplicationContext_legacy.connectionHandle,&TX_PHY,&RX_PHY);
 if (ret == BLE_STATUS_SUCCESS)
 {
 APP_DBG_MSG("READ PHY : ");
 APP_DBG_MSG("PHY Param TX= %d, RX= %d \n", TX_PHY, RX_PHY);
 if ((TX_PHY == TX_2M) && (RX_PHY == RX_2M))
 {
 APP_DBG_MSG("*A*TX= %d, **RX= %d \n", TX_PHY, RX_PHY);
 }
 else
 {
 ret = hci_le_set_default_phy(ALL_PHYS_PREFERENCE,TX_2M_PREFERRED,RX_2M_PREFERRED);
 ret = hci_le_set_phy(BleApplicationContext.BleApplicationContext_legacy.connectionHandle,ALL_PHYS_PREFERENCE,TX_2M_PREFERRED,RX_2M_PREFERRED,0);
 ret = hci_le_read_phy(BleApplicationContext.BleApplicationContext_legacy.connectionHandle,&TX_PHY,&RX_PHY);
 APP_DBG_MSG("*B*TX= %d, **RX= %d \n", TX_PHY, RX_PHY);
 
 }
 }
 else
 {
 APP_DBG_MSG("Read conf not succeess \n");
 }
 
 return;
}

From this, once a connection is formed I retrieve the following output.

[10:24:00.216] HCI_LE_CONNECTION_COMPLETE_SUBEVT_CODE for connection handle 0x802Interval : 30, Latency : 0
[10:24:00.246] **MTU_size = 257 
 
[10:24:00.246] READ PHY : PHY Param TX= 1, RX= 1 *B*TX= 1, **RX= 1 **MTU_size = 257 
 
[10:24:00.371] READ PHY : PHY Param TX= 1, RX= 1 *B*TX= 1, **RX= 1 

I am unable to understand why the PHY mode remains in 1M mode.

I am also attempting to maximise my throughput, sending simple text files (anywhere from 1k to 1M+ bytes) from a windows App to the board. I have read through plenty of documentation regarding maximising throughput, however any advice would be appreciated!

Regards,

Oliver.