US Patent 10368169 Power and bandwidth efficient true wireless stereo speakers

Methods, systems, and devices for wireless communications are described. Generally the described techniques provide for establishing, by a first speaker a control communication link with a second speaker over a first piconet, receiving a signal during an extended synchronous connection-oriented (eSCO) window between a wireless device and the second speaker (e.g., one of a null signal, an acknowledgement (ACK) signal, or a negative acknowledgement (NACK) signal) switching from the second piconet to the first piconet based on the received communication, communicating with the second speaker on the first piconet, and closing the eSCO window based at least in part on the communication.