User's Manual

Interfaces
10 DUST NETWORKS™ M1030-2 MOTE DATASHEET
CONFIDENTIAL
Figure 7 Vcc Inrush Current
6.3 Serial Interface Boot Up
Upon mote power up, the CTS line is high (inactive). The mote serial interface boots within boot_delay (see Table 13) of the
mote powering up, at which time the mote transmits an HDLC Mote Information packet, as described in section 7.4.3.7.
Once the mote has established wireless network connection, it uses the CTS pin to signify availability to accept serial packets
for wireless transmission. At certain critical times during communication, the mote may bring
CTS high. CTS remains high if
the mote does not have enough buffer space to accept another packet. It also remains high if the mote is not part of the
network. Sensor processors must check that the
CTS pin is low before initiating each serial packet for wireless transmission.
Note that the mote may receive local serial packets at any time regardless of the
CTS state.
7.0 Interfaces
7.1 Status LED Signal
The M1030-2 provides an output that can be used to drive a status LED. This signal indicates network connectivity
information which is useful during mote installation. Alternatively, the mote’s network status may be polled via serial using
the Get Parameter request (see
7.4.3.6) with the mote state parameter (see 7.4.4.3). See Figure 2 for an example application
circuit.
7.2 Discrete Input/Output (I/O)
The M1030-2 has the ability to perform discrete sensor sampling and digital output actuating.
The M1030-2 has two analog inputs (A1, A2), one digital input (D2), one digital output (D1), and a voltage reference (Vref)
output to allow for ratiometric sensors. Refer to section
3.0 for electrical specifications.
The mote buffers individual sensor readings and may perform the following functions:
• Concatenate individual readings into a report and send it into the network
• Summarize the readings into a report and send a it into the network
• Compare readings against threshold values and send a report into the network only if a limit is violated (event-based
monitoring)
• Compare readings against threshold values and locally actuate the digital output
Table 11 Status LED
LED Signal Behavior Mote State
High Off, or in sleep mode
Slow single blink (100 ms low, 900 ms high) On, and searching for potential network
Single blink (100 ms low, 400 ms high) On, and attempting to join network
Double blink (100 ms low, 100 ms high, 100 ms low, 700 ms
high)
On, connected to network, attempting to establish redundant
links
Low On, fully configured into network with redundant parents