weeder.1

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weeder(1) Qualcomm Atheros Open Powerline Toolkit weeder(1)

NAME
weeder - Weeder Solid State Relay Module Controller

SYNOPSIS
weeder [options] [attenuation]

DESCRIPTION
Set or get the attenuation level on the Qualcomm Atheros Production Test System using a local RS-232 communication port.
Attenuator settings are changed if an attenuation value is specified. Attenuator settings are read and displayed if no
attenuation value is specified. The serial port settings must be configured before running this program. Settings are
9600 baud, no parity, 8 data and 1 stop bit. See datasheet http://www.weedtech.com/wtssr-m.pdf for more information.

OPTIONS
-e echo
Enable or disable echo mode. The value of echo can be 1=on or 0=off. Alternately, keywords "on" and "off" can be
used. Atheros recommends that you always disable echo when using this program to speed relay switching.

-m mode
Turn on or off the Device Under Test power. The value of mode can be 1=on or 0=off. Alternately, keywords "on"
and "off" can be used.

-o units
Change relay control module order. Individual relay control modules are assigned a digital address that can be
referenced using the UTF-8 letters "[A-P]" then "[a-p]". The Atheros PTS is configured so that module "B" is
activated before module "A". This options lets you specify some other module order. The default value is "BA" to
indicate "B" before "A".

-p port
The name of the serial port. On Linux, the name is usually "/dev/ttyS[0-4]". On OS/X, the name is usually
"/dev/cua[0-4]". On Windows, the name is "com[0-9]:". The default is "/dev/ttyS0" on Linux and "com1:" on Win‐
dows. If environment string "WEEDER" is defined then it takes precedence over the default serial port. This
option then takes precedence over either default. Belkin USB-to-serial cables are named "/dev/ttyUSB0" on Linux.

-w wait
Wait time in milliseconds. Serial I/O operation are slow and a delay is needed after each write operation.
Unfortunately, different operating systems require different wait times. This options lets you adjust the time.
The default is 10 milliseconds which should be adequate on most systems.

ARGUMENTS
attenuation
The attenuation in decibels. The attenuation may be expressed in decimal, binary or hexadecimal when setting
attenuator but is displayed in decimal when reading the attenuator. Binary values start with "0b" and hexadecimal
values start with "0x".

EXAMPLES
The following example turns the Device Under Test power on and configures the attenuator for 72db attenuation. Option -m
is not necessary if the Device Under Test power is already on.

# weeder -m 1 72

The next example configures the controller for 42db attenuation. There is no needed to turn the Device Under Test on
again because it remains on until turned off.

# weeder 42

The next example configures the controller for 56db attenuation and turns the Device Under Test off.

# weeder -m off 56

The next example displays the current attenuation on the console because no attenuation value was specified.

# weeder

REFERENCES
Information shown above applies to WTSSR-M Solid State Relay Module by Weeder Technologies, 90-A Beal Pkwy NW, Fort Wal‐
ton Beach FL 32548 USA; Tel +44 850 863 5723.