diff --git a/port/posix-h4/main.c b/port/posix-h4/main.c
index 8ced66009..496ac6bcd 100644
--- a/port/posix-h4/main.c
+++ b/port/posix-h4/main.c
@@ -211,8 +211,9 @@ int main(int argc, const char * argv[]){
     hci_dump_open("/tmp/hci_dump.pklg", HCI_DUMP_PACKETLOGGER);
 
     // pick serial port
-    config.device_name = "/dev/tty.usbserial-A900K2WS"; // DFROBOT
-    // config.device_name = "/dev/tty.usbserial-A50285BI"; // BOOST-CC2564MODA New
+    // config.device_name = "/dev/tty.usbserial-A900K2WS"; // DFROBOT
+    config.device_name = "/dev/tty.usbserial-A50285BI"; // BOOST-CC2564MODA New
+    // config.device_name = "/dev/tty.usbserial-A9OVNX5P"; // RedBear IoT pHAT breakout board
 
     // init HCI
     const btstack_uart_block_t * uart_driver = btstack_uart_block_posix_instance();