User`s guide

MASSA PRODUCTS CORPORATION M3 & Digi Gateway Quick Guide on Getting Started
M3 & Digi Gateway Quick Guide on Getting Started 4 060513
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Troubleshooting
When the gateway’s XBee settings have been adjusted, power the sensor. It will blink green 3 times and then
turn on RED and typically within 18 seconds, it will associate with the gateway. Once associated, the sensor
will blink RED every 2 seconds.
Unassociated indication: If the sensor does not associate within 18 seconds (LED solid red), then it will
continue to search a gateway to associate to for up to 50 seconds. After this power up sequence, sensor with
sleep setting = 0 (factory default) will default to a 1 minute sleep cycle to conserve battery power. Once
associated, then it will blink every 2 seconds.
Reasons a sensor will not associate with a gateway:
a) Gateway’s “Scan Channel (SC)” register not set to “0x1ffe”.
b) Sensor PAN ID is non-zero (previously changed by user) and does not match gateway’s PAN ID.
c) Encryption is enabled (EE=1) with non-matching gateway and sensor “Link encryption key (KY)”.
d) Gateway has more than 10 sensors associated with it. If Number of remaining children (NC) register
(see Xbee Configuration – Device) is 0, then sensor will not associate. You may manually reset this by
changing Scan Channel (SC) register to 0x1 and then return it to 0x1ffe which will reset the NC register
to 10 allowing sensors to rejoin. Also, another option is to reboot the gateway if using Massa python
code version 1.02 which will reset the NC register (upon boot). To expedite sensor rejoining the
gateway, you can re-power the sensor (press commission button after battery removal to discharge any
internal voltage).
e) Sensor is out of RF range with the gateway. Avoid placing a gateway in an all metal building with the
sensor outdoors. In such cases, place gateway by window facing sensor.
f) If gateway was power cycled with sensor that has s Deep Sleep setting = 0 (factory default), then it may
take sensor up to 1 hour to re-associate with gateway. To expedite sensor rejoining the gateway, you
can re-power the sensor (press commission button after battery removal to discharge any internal
voltage).
g) If sensor is sleeping longer than the gateway’s poll timeout setting (0.03 x SN x SP in seconds), then it
will have to rejoin gateway. If the intention is for the gateway to maintain association with sensor,
program the gateway’s poll timeout to at least 3-4 times longer than the sensor’s sleep setting. If the
gateway had dropped a sensor from its association list, the sensor will have to rejoin the gateway
which causes additional battery power usage and should be avoided in most applications. The
gateway maintains individual poll timeout registers for each sensor which, when associated, will reset
for a full poll timeout period.
h) Antennas for both gateway and sensor may not be vertical.
First step is to have the sensor associated with the gateway before you proceed with adjusting any sensor
settings (with sensor’s red LED blinking every 2 seconds).
For additional troubleshooting information, see the M3 Sensor Users Guide Appendix H.