Davis VP2 usb datalogger

adiabatico · 30 August 2008 15:12

Hi all, I’m trying to use my Davis VP2 with usb datalogger with WD in a gNewSense linux distribution. I have connect the usb and the lsusb command said this:

lsusb
Bus 005 Device 001: ID 0000:0000  
Bus 004 Device 001: ID 0000:0000  
Bus 003 Device 002: ID 10c4:ea60 Cygnal Integrated Products, Inc. 
Bus 003 Device 001: ID 0000:0000  
Bus 002 Device 003: ID 046d:c50e Logitech, Inc. MX-1000 Cordless Mouse Receiver
Bus 002 Device 001: ID 0000:0000  
Bus 001 Device 001: ID 0000:0000

I see that Bus 003 Device 002: ID 10c4:ea60 Cygnal Integrated Products, Inc. is the usb of Davis.
Now I use this command to load the kernel module for usbserial:

modprobe usbserial vendor=0x10c4 product=0xea60

and the dsmeg said me

[ 6508.343761] /srv/tmp/linux-2.6.24/drivers/usb/serial/usb-serial.c: USB Serial support registered for cp2101
[ 6508.343787] cp2101 3-2:1.0: cp2101 converter detected
[ 6508.455557] usb 3-2: reset full speed USB device using uhci_hcd and address 2
[ 6508.599658] usb 3-2: cp2101 converter now attached to ttyUSB0
[ 6508.599673] usbcore: registered new interface driver cp2101
[b][ 6508.599676] /srv/tmp/linux-2.6.24/drivers/usb/serial/cp2101.c: Silicon Labs CP2101/CP2102 RS232 serial adaptor driver v0.07[/b]

I think that all it’s ok, but now I’m lost, how can I configure WD? What it’s the number of the comm port to use? When I click in the botton " Refresh list of COMM port" nothing appear.

Thank’s

windy2 · 31 August 2008 03:09

you would need to load the driver for linux provided by Davis on their web site for the USB data logger

adiabatico · 31 August 2008 11:09

Ok, The Davis web doesn’t have a linux driver for _USB data logger. But I have used Windows driver with ndiswrapper utility to load the driver in the Linux system:

/Silabs/MCU/CP210x# ndiswrapper -i slabbus.inf

and again I think all it’s ok

ndiswrapper -l 
slabbus : driver installed
	device (10C4:EA60) present (alternate driver: cp2101)

and dmesg said:

usb 3-2: cp2101 converter [b]now attached to ttyUSB0[/b]
[   23.182263] usbcore: registered new interface driver cp2101
[   23.182267] /srv/tmp/linux-2.6.24/drivers/usb/serial/cp2101.c: Silicon Labs CP2101/CP2102 RS232 serial adaptor driver v0.07

It’s now attach to ttyUSB0, but it’s not a serial port, How can tell to WD look at that port? or How can I change to ttyUSB0 to a real serial port?

prodata · 31 August 2008 11:25

I believe that ttyUSB0 is a serial port despite its name. Just try using it with that name (assuming WDfL allows you to do that, ie to enter a text string as a port identifier rather than just a COM number)). I’ve used ttyUSB0 as a serial port with a Python program running under Linux to read VP2 data and it works fine. I was using Ubuntu 8.0.4 (is I’ve remembered the version number correctly) and the relevant USB-to-VCP driver was loaded by default :D.

adiabatico · 31 August 2008 16:24

I don’t know how to make this in WD.

Prodata, I would like running your Python program in my computer to check the communication between the computer and Davis VP2. Could you share the code?

Thank’s

windy2 · 31 August 2008 18:38

you can set to use that serial name in the latest linux full version of WD

I have seen and downloaded the driver for the usb data logger from the davis web site.,…so it does exist…but its not obvious…
it has also been posted on this forum before

adiabatico · 31 August 2008 19:27

Sorry for the inconvenience, but where in WD I can set that serial name?

And in the davis web I found only this drivers, only for Mac and Windows:

http://www.davisnet.com/support/weather/software_driver.asp

windy2 · 31 August 2008 19:59

in the com port setup you should be able
(in the USB to serial name)
which version of WD linux are you using?
(the more information you can provide the better)

adiabatico · 2 September 2008 17:46

I put in USB to serial name: /dev/ttyUSB0 but unfortunately doesn’t work. I’m running the linux version 10.37i trial.

windy2 · 2 September 2008 18:47

what do you see under view, ws2010/ws2500 data report

also you would need to restart WD

adiabatico · 2 September 2008 22:06

I see this:

Loaded all time records
Connecting com port
trying to open comport /dev/ttyUSB0 ,handle → 8
Com port connected OK
set the comport OK to speed 19200

windy2 · 3 September 2008 01:40

that looks like you have a connection
does the data received light flash at all?

adiabatico · 3 September 2008 07:54

No, the lights remains in red, and 0 value in data receive.

adiabatico · 15 September 2008 10:52

I’m frustrated, but again I try to use WD with Davis VP2 with USB data logger. Maybe I can provide more information about the problem using the WD Linux console version.
All in my system appear correct, again I put the information of dmesg command:

usbcore: registered new interface driver usbserial
[   27.322512] /build/buildd/linux-2.6.24/drivers/usb/serial/usb-serial.c: USB Serial support registered for generic
[   27.322587] usbcore: registered new interface driver usbserial_generic
[   27.322592] /build/buildd/linux-2.6.24/drivers/usb/serial/usb-serial.c: USB Serial Driver core
[   27.364031] /build/buildd/linux-2.6.24/drivers/usb/serial/usb-serial.c: USB Serial support registered for cp2101
[   27.364091] cp2101 4-1:1.0: cp2101 converter detected
[   27.472542] usb 4-1: reset full speed USB device using uhci_hcd and address 2
[   27.616759] usb 4-1: cp2101 converter now attached to ttyUSB0
[   27.616782] usbcore: registered new interface driver cp2101
[   27.616788] /build/buildd/linux-2.6.24/drivers/usb/serial/cp2101.c: Silicon Labs CP2101/CP2102 RS232 serial adaptor driver v0.07

The station it’s appear to attached to ttyUSB0 port.

The permissions for ttyUSB0 dev are ok:

 
ls -la ttyUSB0 
crwxrwxrwx 1 root dialout 188, 0 2008-09-15 12:39 ttyUSB0

In the configuration file I put this options:

Weather station type=31 // Davis VP
Comport number (e.g 1)=U //use U for ttyUSB0 (i.e usb to serial)

Now I run ./GoWdconsole.sh

utc hour=10
local hour=12
31 2
Weather station type is a Davis VP
Station name =My station
Comport is USB to serial
Yes Revb Davis VP
Davis rain gauge 0.2mm
trying to open comport U result -> 3
Requesting Loop data
Requesting Loop data
Requesting Loop data
Requesting Loop data
Requesting Loop data
Requesting Loop data
Requesting Loop data

ad infinitum …

Why?

Thank you very much again.

windy2 · 16 September 2008 00:54

its possible its a baud rate setting that is wrong
consolewd is expecting the baud rate to be 19200 for the VP

I found some old posts on this subject
i.e

I talked with folks at Davis yesterday and they indicated they do not currently have a USB to UART driver for the USB data logger and Linux. They said at this time there are no plans to support Linux, but they may if there was enough customer interest.

adiabatico · 16 September 2008 19:14

In windows system WD has a baud rate of 19200 and it’s working.

I have wrote to Davis customer support and they have send me the link of the Linux driver for CP210x USB to UART Bridge VCP Drivers:

https://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx

I will try to compile this driver for my system.

windy2 · 17 September 2008 04:48

thats where I have seen a linux driver before…
I could not get it to compile myself though…

mrkarron · 24 September 2008 02:00

Hello,

Does anyone know if the Davis USB datalogger will work with Ubunto 8.04? I am new to this OS and am trying to get an idea of how big of a project it will be to get WD working…

Ron