User manual

1-Wire Application Guide v1.04 Page 13 of 41
Sensors
Texas Weather
Instruments
sensors
N/C GND DQ GND N/C DC
Supply
RJ-12
Simon Atkins’ Hub +5VDC +5VDC DC
Supply
DQ GND DC
Supply
GND GND
RJ-45
AAG RJ-45
Sensors
DQ GND +5VDC +12VDC +12VDC +5VDC GND GND
RJ-45
Hobby-Boards
Sensors
GND +5VDC GND DQ GND N/C +12VDC GND
RJ-45
1Wire.org draft
standard for RJ45
GND +5VDC GND DQ GND Analog
Signal
+12VDC GND
RJ-45
RJ-11 refers to the common 4-pin telephone plug.
RJ-12 is the less common equivalent plug that has 6 pins equipped.
RJ-45 is the common 8-pin Ethernet plug.
Pin numbers in the table above presume that Pin 1 of the female connector is on
the left when facing it and the spring latch is on the bottom as in Figure 8.
Figure 8 RJ-12 and RJ-45 Connectors
2.4 Trouble-Shooting Network Problems
There are many components to a 1-Wire network, including the PC, the PC Serial
Port, PC software, the 1-Wire interface, the sensors, and the wiring. As a result,
trouble-shooting needs to be done in a methodical way, starting at basics and
then building up to the point where trouble begins.
In a TEMP08 system, start by making sure that TEMP08 is alive and well. If the
green light is flashing, and goes red from time to time, then TEMP08 is
functioning. Disconnect all your sensors from TEMP08 now.
Connect TEMP08 now to a PC running a terminal emulation program, such as
HyperTerminal, which comes with every Windows PC. Make sure that you can
communicate to TEMP08 by trying a few commands and then verifying that the
responses come back. If this isn’t working, check the settings on your serial port