I’m trying to get my MHZ19B CO2 sensor connected but when adding it in inputs I cannot change the UART device location; as soon as I confirm /dev/ttyUSB0 I Press enter and it activates on /dev/ttyAMA0
I desoldered a couple times the TX/RX to get a reading but I think it’s trying to read from AMA0…
How can I get this to work?
LOGS:
pi@raspberrypi:~ $ udevadm info --name=/dev/ttyUSB0 --attribute-walk
Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.
looking at device ‘/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0/tty/ttyUSB0’:
KERNEL==“ttyUSB0”
SUBSYSTEM==“tty”
DRIVER==""
looking at parent device ‘/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0’:
KERNELS==“ttyUSB0”
SUBSYSTEMS==“usb-serial”
DRIVERS==“cp210x”
ATTRS{port_number}==“0”
looking at parent device ‘/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.1/1-1.1:1.0’:
KERNELS==“1-1.1:1.0”
SUBSYSTEMS==“usb”
DRIVERS==“cp210x”
ATTRS{bInterfaceProtocol}==“00”
ATTRS{bAlternateSetting}==" 0"
ATTRS{bInterfaceSubClass}==“00”
ATTRS{bInterfaceClass}==“ff”
ATTRS{authorized}==“1”
ATTRS{bNumEndpoints}==“02”
ATTRS{supports_autosuspend}==“1”
ATTRS{interface}==“CP2102 USB to UART Bridge Controller”
ATTRS{bInterfaceNumber}==“00”
looking at parent device ‘/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.1’:
KERNELS==“1-1.1”
SUBSYSTEMS==“usb”
DRIVERS==“usb”
ATTRS{tx_lanes}==“1”
ATTRS{bcdDevice}==“0100”
ATTRS{bmAttributes}==“80”
ATTRS{bDeviceSubClass}==“00”
ATTRS{removable}==“unknown”
ATTRS{authorized}==“1”
ATTRS{devpath}==“1.1”
ATTRS{devspec}=="(null)"
ATTRS{idVendor}==“10c4”
ATTRS{bConfigurationValue}==“1”
ATTRS{urbnum}==“15”
ATTRS{ltm_capable}==“no”
ATTRS{maxchild}==“0”
ATTRS{bMaxPacketSize0}==“64”
ATTRS{bDeviceProtocol}==“00”
ATTRS{quirks}==“0x0”
ATTRS{manufacturer}==“Silicon Labs”
ATTRS{bMaxPower}==“100mA”
ATTRS{configuration}==""
ATTRS{serial}==“0001”
ATTRS{bDeviceClass}==“00”
ATTRS{busnum}==“1”
ATTRS{version}==" 1.10"
ATTRS{rx_lanes}==“1”
ATTRS{speed}==“12”
ATTRS{product}==“CP2102 USB to UART Bridge Controller”
ATTRS{devnum}==“4”
ATTRS{idProduct}==“ea60”
ATTRS{bNumConfigurations}==“1”
ATTRS{bNumInterfaces}==" 1"
ATTRS{avoid_reset_quirk}==“0”
looking at parent device ‘/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1’:
KERNELS==“1-1”
SUBSYSTEMS==“usb”
DRIVERS==“usb”
ATTRS{removable}==“unknown”
ATTRS{bDeviceSubClass}==“00”
ATTRS{devnum}==“2”
ATTRS{version}==" 2.10"
ATTRS{bMaxPower}==“100mA”
ATTRS{rx_lanes}==“1”
ATTRS{ltm_capable}==“no”
ATTRS{configuration}==""
ATTRS{bNumConfigurations}==“1”
ATTRS{avoid_reset_quirk}==“0”
ATTRS{bMaxPacketSize0}==“64”
ATTRS{quirks}==“0x0”
ATTRS{idVendor}==“2109”
ATTRS{bDeviceProtocol}==“01”
ATTRS{maxchild}==“4”
ATTRS{product}==“USB2.0 Hub”
ATTRS{bcdDevice}==“0421”
ATTRS{devpath}==“1”
ATTRS{speed}==“480”
ATTRS{devspec}=="(null)"
ATTRS{urbnum}==“56”
ATTRS{idProduct}==“3431”
ATTRS{bConfigurationValue}==“1”
ATTRS{bmAttributes}==“e0”
ATTRS{bDeviceClass}==“09”
ATTRS{bNumInterfaces}==" 1"
ATTRS{busnum}==“1”
ATTRS{tx_lanes}==“1”
ATTRS{authorized}==“1”
looking at parent device ‘/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1’:
KERNELS==“usb1”
SUBSYSTEMS==“usb”
DRIVERS==“usb”
ATTRS{bDeviceProtocol}==“01”
ATTRS{manufacturer}==“Linux 5.10.17-v7l+ xhci-hcd”
ATTRS{idProduct}==“0002”
ATTRS{rx_lanes}==“1”
ATTRS{bDeviceClass}==“09”
ATTRS{urbnum}==“30”
ATTRS{bMaxPacketSize0}==“64”
ATTRS{authorized}==“1”
ATTRS{bNumInterfaces}==" 1"
ATTRS{bMaxPower}==“0mA”
ATTRS{bNumConfigurations}==“1”
ATTRS{tx_lanes}==“1”
ATTRS{removable}==“unknown”
ATTRS{serial}==“0000:01:00.0”
ATTRS{version}==" 2.00"
ATTRS{interface_authorized_default}==“1”
ATTRS{configuration}==""
ATTRS{idVendor}==“1d6b”
ATTRS{bDeviceSubClass}==“00”
ATTRS{speed}==“480”
ATTRS{bcdDevice}==“0510”
ATTRS{bmAttributes}==“e0”
ATTRS{devnum}==“1”
ATTRS{quirks}==“0x0”
ATTRS{ltm_capable}==“no”
ATTRS{avoid_reset_quirk}==“0”
ATTRS{busnum}==“1”
ATTRS{bConfigurationValue}==“1”
ATTRS{authorized_default}==“1”
ATTRS{maxchild}==“1”
ATTRS{product}==“xHCI Host Controller”
ATTRS{devpath}==“0”
looking at parent device ‘/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0’:
KERNELS==“0000:01:00.0”
SUBSYSTEMS==“pci”
DRIVERS==“xhci_hcd”
ATTRS{local_cpulist}==“0-3”
ATTRS{max_link_speed}==“5.0 GT/s PCIe”
ATTRS{current_link_speed}==“5.0 GT/s PCIe”
ATTRS{consistent_dma_mask_bits}==“64”
ATTRS{subsystem_vendor}==“0x1106”
ATTRS{msi_bus}==“1”
ATTRS{driver_override}=="(null)"
ATTRS{subsystem_device}==“0x3483”
ATTRS{local_cpus}==“f”
ATTRS{dma_mask_bits}==“64”
ATTRS{vendor}==“0x1106”
ATTRS{ari_enabled}==“0”
ATTRS{max_link_width}==“1”
ATTRS{class}==“0x0c0330”
ATTRS{irq}==“65”
ATTRS{device}==“0x3483”
ATTRS{broken_parity_status}==“0”
ATTRS{current_link_width}==“1”
ATTRS{enable}==“1”
ATTRS{revision}==“0x01”
looking at parent device ‘/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0’:
KERNELS==“0000:00:00.0”
SUBSYSTEMS==“pci”
DRIVERS==“pcieport”
ATTRS{dma_mask_bits}==“32”
ATTRS{subsystem_vendor}==“0x0000”
ATTRS{broken_parity_status}==“0”
ATTRS{consistent_dma_mask_bits}==“32”
ATTRS{revision}==“0x10”
ATTRS{local_cpus}==“f”
ATTRS{ari_enabled}==“0”
ATTRS{device}==“0x2711”
ATTRS{secondary_bus_number}==“1”
ATTRS{max_link_width}==“1”
ATTRS{enable}==“1”
ATTRS{driver_override}=="(null)"
ATTRS{local_cpulist}==“0-3”
ATTRS{vendor}==“0x14e4”
ATTRS{current_link_width}==“1”
ATTRS{max_link_speed}==“5.0 GT/s PCIe”
ATTRS{irq}==“64”
ATTRS{current_link_speed}==“5.0 GT/s PCIe”
ATTRS{class}==“0x060400”
ATTRS{subsystem_device}==“0x0000”
ATTRS{subordinate_bus_number}==“1”
ATTRS{msi_bus}==“1”
looking at parent device ‘/devices/platform/scb/fd500000.pcie/pci0000:00’:
KERNELS==“pci0000:00”
SUBSYSTEMS==""
DRIVERS==""
looking at parent device ‘/devices/platform/scb/fd500000.pcie’:
KERNELS==“fd500000.pcie”
SUBSYSTEMS==“platform”
DRIVERS==“brcm-pcie”
ATTRS{driver_override}=="(null)"
looking at parent device ‘/devices/platform/scb’:
KERNELS==“scb”
SUBSYSTEMS==“platform”
DRIVERS==""
ATTRS{driver_override}=="(null)"
looking at parent device ‘/devices/platform’:
KERNELS==“platform”
SUBSYSTEMS==""
DRIVERS==""
Daemon log:
2021-07-09 14:25:38,078 - INFO - mycodo.controllers.controller_input_2ce87ed6 - Deactivated in 40.9 ms
2021-07-09 14:25:51,832 - ERROR - mycodo.controllers.controller_input_2ce87ed6 - initialize_variables() Exception: Write timeout
Traceback (most recent call last):
File “/var/mycodo-root/mycodo/controllers/base_controller.py”, line 74, in run
self.initialize_variables()
File “/var/mycodo-root/mycodo/controllers/controller_input.py”, line 317, in initialize_variables
self.measure_input = input_loaded.InputModule(self.input_dev)
File “/home/pi/Mycodo/mycodo/inputs/mh_z19b.py”, line 130, in init
self.initialize_input()
File “/home/pi/Mycodo/mycodo/inputs/mh_z19b.py”, line 151, in initialize_input
self.abcoff()
File “/home/pi/Mycodo/mycodo/inputs/mh_z19b.py”, line 199, in abcoff
self.ser.write(bytearray([0xff, 0x01, 0x79, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86]))
File “/var/mycodo-root/env/lib/python3.7/site-packages/serial/serialposix.py”, line 636, in write
raise SerialTimeoutException(‘Write timeout’)
serial.serialutil.SerialTimeoutException: Write timeout
2021-07-09 14:25:51,833 - INFO - mycodo.controllers.controller_input_2ce87ed6 - Activated in 5160.6 ms
2021-07-09 14:25:51,835 - ERROR - mycodo.controllers.controller_input_2ce87ed6 - Mycodo is attempting to acquire measurement(s) from an Input that has already critically errored. Review the log lines following Input Activation to investigate why this happened.
2021-07-09 14:25:57,964 - INFO - mycodo.controllers.controller_input_2ce87ed6 - Deactivated in 67.6 ms