04:26:10,743 - Recv: echo: Last Updated: | Author: (Bob Kuhn, Anet config)
#Qinheng electronics hl 340 usb serial adapter driver serial#
04:26:09,090 - Changing monitoring state from "Opening serial port" to "Connecting" 04:26:09,089 - Connected to: Serial(port='/dev/ttyUSB0', baudrate=115200, bytesize=8, parity='N', stopbits=1, timeout=10.0, xonxoff=False, rtscts=False, dsrdtr=False), starting monitor 04:26:09,082 - Changing monitoring state from "Offline" to "Opening serial port" Would you like the log for today? This is the Serial log.
Why would the printer board stay online long enough to negotiate the handshake only to not answer the "hello" ? Which leads me to wonder again, what does lsusb say now that the log claims that the Pi has given up ? The 2 devices, both printer controller board, and Pi, have agreed upon a set of communication skills, which we see listed, yet, when trying to actually communicate using the agreed upon skillset, it appears to be the printer controller board that is refusing to answer the "hello" sent by the Pi, at which point the Pi sends out another "hello", which the controller board dutifully refuses to respond to, causing the Pi to give up and actually quit trying, and terminate the connection The handshake process has been successfully negotiated. So, to simplify (to myself because you guys are obviously far beyond me, and because I think best when I think out loud). 16:40:02,712 - No answer from the printer within the connection timeout, trying another hello 16:39:32,671 - Changing monitoring state from "Opening serial port" to "Connecting"
16:39:32,671 - Connected to: Serial(port='/dev/ttyUSB0', baudrate=115200, bytesize=8, parity='N', stopbits=1, timeout=10.0, xonxoff=False, rtscts=False, dsrdtr=False), starting monitor Hubīus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root $ lsusbīus 001 Device 006: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapterīus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MK260 Wireless Combo Receiverīus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Here the output of my pi before and after I reconnected my printer $ lsusbīus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubīus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hubīus 001 Device 005: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapterīus 001 Device 004: ID 0c45:6340 Microdia Cameraīus 001 Device 003: ID 046d:c52e Logitech, Inc. The device number increments everytime a device is reconnected.
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