--- instance0 ---
Normal True
Loopback True
recv 0x51 b'Loopback'
Silent False
silent_rx_count True
Silent Loopback True
recv 0x54 b'SiLoop'
Normal again True
--- instance1 ---
recv 0x50 b'Normal'
recv 0x51 b'Loopback'
send failed
recv 0x55 b'Normal2'
