R F - t o - U S B - R D 2
6
Rev. 0.2
4.
Node (1–4)
Up to four nodes may be connected to the PC application. The associated node window becomes enabled (or
ungreyed) as each node associates.
This demonstration uses a very simple association scheme. Each node board powers up unassociated. On the
first button press, the node requests a node ID from the dongle. The dongle assigns IDs in a round-robin
fashion, i.e. 1-2-3-4-1-2-…
Note that there is no disassociation, and given the round-robin association scheme, it is possible to have two
boards associated with the same node ID, particularly if power is cycled on the node boards. Reset is
accomplished by disconnecting and reconnecting the PC application, cycling power on the node boards, then
reassociating each by pressing its button.
5.
Temperature Window
This displays the node's temperature, as measured by the Si1014's on-chip temp sensor. The node will transmit
temperature data periodically, then enter a low-power sleep mode after several seconds. Press the node's
button to wake and send again.
6.
Potentiometer Window
This displays a normalized ADC reading from the node. The voltage measured by the ADC is set by a
potentiometer on the board.
Note:
The second generation RF to USB Reference Design is not backward-compatible with the earlier version because the
over-the-air protocol has changed. First-generation node boards are identified by part number “4431-DASNF912 HB”,
whereas second-generation node boards are identified by part number “SA-TS095PCB-001”. The dongle is compatible
with either kit since its software is downloaded automatically by the PC application.
Summary of Contents for RF-to-USB-RD2
Page 16: ...RF to USB RD2 16 Rev 0 2 6 PCB Schematics and Layouts Figure 22 Node Schematic ...
Page 17: ...RF to USB RD2 Rev 0 2 17 Figure 23 Dongle Schematic ...
Page 19: ...RF to USB RD2 Rev 0 2 19 Figure 27 Node PCB Layout L4 Bottom ...
Page 20: ...RF to USB RD2 20 Rev 0 2 Figure 28 Dongle PCB Layout L1 Top Figure 29 Dongle PCB Layout L2 ...
Page 21: ...RF to USB RD2 Rev 0 2 21 Figure 30 Dongle PCB Layout L3 Figure 31 Dongle PCB Layout L4 Bottom ...
