SapIP – IRT Instruction Manual 1/23/2017
Page 46
Dynamax, Inc.
o
The LED turns on while the data is formatted and sent to the radio.
Note: There will be a pseudorandom delay before the data is sent.
o
Then, the battery voltages are checked. If they are bad, revert to the ‘Battery Charge
Loop’ (as listed above).
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Next, the LED will be turned off and the pseudorandom delay is normalized so the total
delay is 200 milliseconds. The Measurement Loop restarts at the top.
o Blink Codes
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DS2 is attached directly to the radio; CPU firmware does not control this LED. That LED is called
the “associate LED” in the Zigbee documentation.
o
Note: It is the customer’s responsibility to check the Zigbee documents.
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Context is everything when examining the radio blink codes. The client should know where he or
she is in the software loop to correctly interpret the radio blink codes.
o
Note: There may be reason to believe Zigbee documents are not 100% accurate.
5.1
Normal
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When first powering up an IRT with a coordinator nearby waiting for association, the LED is off for
several seconds then several fast blinks will occur, indicating association.
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Next, the normal blink sequence will start: 9 short blinks separating the 10 one second sleep periods.
After that is the 2 second. It then repeats until the time to transmit data. The first blink has an
irregularity due to timing tricks used to tune the software for accuracy.
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When in API mode during transmission of data the LED blinks fast about 4 times depending on
packet transmission time + acks.
5.2
References to Blink Codes in the Zigbee Manual
End Device Blink Rate
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“XBee: ZB End Device Joining” pg. 48 associate blink rate is 2 times per second.
Associate LED (pg. 80)
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Shows diagrams for success and failure codes.
Join Notification (pg. 130)
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LED is blinked rapidly on all devices that receive a JN command.
Blink Rate Command (pg. 133)