diff --git a/chipset/bcm/btstack_chipset_bcm.c b/chipset/bcm/btstack_chipset_bcm.c
index 7b075da53..f78055fb8 100644
--- a/chipset/bcm/btstack_chipset_bcm.c
+++ b/chipset/bcm/btstack_chipset_bcm.c
@@ -147,15 +147,6 @@ static btstack_chipset_result_t chipset_next_command(uint8_t * hci_cmd_buffer){
         if (res == 0){
             log_info("chipset-bcm: end of file, size %u", init_script_offset);
             close(hcd_fd);
-
-            // TODO: should not be needed anymore - fixed for embedded below and tested on RedBear Duo
-
-            // wait for firmware patch to be applied - shorter delay possible
-#ifdef _WIN32
-            Sleep(1000);
-#else
-            sleep(1);
-#endif
             return BTSTACK_CHIPSET_DONE;
         }
         if (res < 0){
@@ -285,13 +276,6 @@ static btstack_chipset_result_t chipset_next_command(uint8_t * hci_cmd_buffer){
     }
 
     if (init_script_offset >= brcm_patch_ram_length) {
-        
-        // It takes up to 2 ms for the BCM to raise its RTS line
-        // If we send the next command right away, the raise of the RTS will fall happen during
-        // it and causing the next command to fail (at least on RedBear Duo with manual CTS/RTS)
-        //
-        // -> Work around implemented in hci.c
-
         return BTSTACK_CHIPSET_DONE;
     }
 
diff --git a/src/hci.c b/src/hci.c
index 71c49eff4..0d637aa4e 100644
--- a/src/hci.c
+++ b/src/hci.c
@@ -1334,11 +1334,12 @@ static void hci_initializing_run(void){
                         hci_stack->hci_transport->set_baudrate(baud_rate);
                     }
 
-                    // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this
-                    //   -> Work around: wait a few milliseconds here.
-                    log_info("BCM delay after init script");
+                    uint16_t bcm_delay_ms = 300;
+                    // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time
+                    //   -> Work around: wait here.
+                    log_info("BCM delay (%u ms) after init script", bcm_delay_ms);
                     hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY;
-                    btstack_run_loop_set_timer(&hci_stack->timeout, 10);
+                    btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms);
                     btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler);
                     btstack_run_loop_add_timer(&hci_stack->timeout);
                     break;