Hi Nancy, > Is this a gatttool limitation or a hardware limitation? It is a hardware limitation of the CSR dongle. I did a similar test using bluetoothctl not long ago: Using a CSR dongle, only 5 bluetooth LE devices could connect. With a Broadcom dongle (BCM20702) I could establish 14 concurrent connections. Then I ran out of bluetooth LE devices.... Regards, Martin -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html