get connected() {
    return (
      this.device !== null &&
      this.device.opened &&
      this.device.configurations[0].interfaces[0].claimed
    );
  }

 async _usbRead(resplen = null){
    let respData = { text : "", };

    if ((resplen === null)) { resplen = this.epIn.packetSize; }

    while (respData.text.length < resplen) {
      try {
        console.log("Transferring In...");
        let respPacket = await this.device?.transferIn(this.epIn?.endpointNumber, resplen);
        console.log("get respPacket");
        let response = new TextDecoder().decode(respPacket.data);
        console.log("get response");
        respData.text  = response;
        console.log("added response");
      } catch (error) {
        if (error.includes("timed out")) {
          console.error("Timed out");
          return new TextEncoder().endcode("");
        } else if (error.includes("Overflow")) {
          console.error("USB Overflow");
          return new TextEncoder().endcode("");
        }
      }
    }
    return new TextEncoder().encode(respData);
  }

  async _usbWrite(cmdPacket, pktSize=null) {
    if (!(pktSize === null)) { pktSize = this.epOut?.packetSize; }
    //let cmdPacket = new TextEncoder().encode(cmd);
    let offset = 0;
    while (offset < cmdPacket.length){
      try {
        console.log("Transferring Out...")
        //console.log(cmdPacket.slice(offset, offset 4));
        await this.device?.transferOut(this.epOut?.endpointNumber, cmdPacket);
        offset  = pktSize;
      } catch (error) {
        console.error(error);
        //return new TextEncoder().encode("");
        return false;
      }
    }
    return true;
  }`