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Using the THUM with the Raspberry Pi
Compiled binaries for ARMv6 Rasberry Pi platform
Notes: You must have a USB Hub with sufficient power available to power on the device for a reading. "Reading failed" is a good general indicator of not sufficient power to the device.
--You should copy thumctl and thumchk.pl to /usr/bin or /usr/local/bin
--When using the thumctl command, you must use at least one switch.
example: thumctl -t
If you run thumctl without a switch, you will need to unplug/replug in the THUM to get it to start responding again.
Required dependencies: libhid, libusb-dev, libusb-0.1-4, libnet-smtpauth-perl
Debian "Stretch" Notes
- libhid has been replaced with libhidapi-libusb0 - which can be installed with apt-get install
Debian Stretch has one version of the libusb-dev library installed:
libusb-dev 2:0.1.12-30 armhf
Debian Stretch has two versions of the libusb library installed:
libusb-0.1-4:armhf 2:0.1.12-30 armhf (installed using apt-get install)
libusb-1.0-0:armhf 2:1.0.21-1 armhf
Debian Stretch has one version of the libnet-smtpauth-perl library installed using apt-get install:
libnet-smtpauth-perl 0.08-4 all
Sample Output:
root@raspberrypi:~# uname -a
Linux raspberrypi 3.2.27+ #250 PREEMPT Thu Oct 18 19:03:02 BST 2012 armv6l
GNU/Linux
root@raspberrypi:~# tar -zxvf thum.pi.src.tar.gz
thum-src/
thum-src/THUM.c
thum-src/thumchk.conf
thum-src/libTHUM.so.1
thum-src/thumctl.c
thum-src/thumctl
thum-src/Makefile
thum-src/thumchk.pl
thum-src/THUM.h
thum-src/Makefile_thumctl
thum-src/THUM.o
root@raspberrypi:~# cd thum-src
root@raspberrypi:~/thum-src# make all
gcc -fPIC -g -c -Wall THUM.c
THUM.c: In function GetVersion:
THUM.c:1000:29: warning: operation on i may be undefined
[-Wsequence-point]
gcc -shared -Wl,-soname,libTHUM.so.1 -o libTHUM.so.1 THUM.o -lc -lm
root@raspberrypi:~/thum-src# make install
cp -f libTHUM.so.1 /usr/lib
ln -sf /usr/lib/libTHUM.so.1 /usr/lib/libTHUM.so
/sbin/ldconfig
root@raspberrypi:~/thum-src# thumc
thumchk.pl thumctl
root@raspberrypi:~/thum-src# thumctl
1/26/2013 15:17:15 23.258900 C 27.625240 3.556923 C 1.000000 0.010000 C
19.000000 1.000000
root@raspberrypi:~# thumchk.pl -v -f -t -h
Enabling verbose output
Setting temperature unit to F
Taking internal temperature reading
Checking for THUM device at /dev/usb/hiddev0
Found Practical Design Gr USB Temp/Humidity Sensor on /dev/usb/hiddev0
Found THUM device at /dev/usb/hiddev0
Taking relative humidity reading
1/26/2013 15:23:06 74.712000 F 25.570978
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