seqn number always the same

[Links2004]

my KNX network gateway does not work when the seqn is the same on every request.
first write will work but the next one gets a ACK but will never be send on the bus.
not sure if this true for all gateways.

can be fixed with:

  /**
   * Generates next sequence number to number each knx telegram
   */
  protected lastSeqnId: number = -1;
  protected nextSeqn() {
    let id = this.lastSeqnId;
    id++;
    if (id > 0xFF) {
        id = 0;
    }
    while (this.sequenceIds.has(id)) {
        id++;
        if (id > 0xFF) {
            id = 0;
        }
        if (id == this.lastSeqnId) {
            throw new Error('Maximum sequence number reached');
        }
    }
    this.lastSeqnId = id;
    this.sequenceIds.add(id);
    return id;
}