September 2007
Beginner to intermediate
432 pages
17h 48m
English
Content preview from Making Things Talk
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208 MAKING THINGS TALK
Figure 6-15
BlueSMiRF radio
attached to a USB-to-
serial adaptor.
Vusb
V3.3
CBUS1
CBUS0
CBUS3
CBUS2
CBUS4
VCCIO
TX
RX
DTR
RTS
RI
DSR
DCD
CTS
Provides 5V output
when plugged into USB port
Vusb
V3.3
CBUS1
CBUS0
CBUS3
CBUS2
CBUS4
VCCIO
TX
RX
DTR
RTS
RI
DSR
DCD
CTS
FTDI
USB-to-Serial Adaptor
GND
RX
TX
V3.3
CTS
+5V
GND
TX
RX
RTS
BlueSMiRF
Module
+5V
Making_Things_Talk.indb 208 11/13/09 4:54 PM
WIRELESS COMMUNICATION 209
Figure 6-16
Bluetooth-to-serial connection
through two serial terminal windows.
radio is discoverable when it’s in Slave mode. The radio
connecting to it is said to be in Master mode. In this step,
you’ll learn a radio’s Bluetooth address and check its
connection status.
A series of status commands tell you about the radio’s
configuration. To learn the radio’s Bluetooth address, type:
ATSI,1\r
It will respond with an address in hexadecimal notation:
OK
1122334455AA
Write down this address, or copy it to a text document.
You’ll need it in a moment. Next, check its connection
status by typing ATSI,3\r. It will respond like so:
OK
0,0
The first digit is telling you that the radio is in slave mode,
and the second, that it’s not connected. Now you can open
a second serial terminal window, open the serial port that
corresponds to the radio’s Bluetooth connection (you
established this port when you paired the radio ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.