Dynamic value reporting for wireless automated systems
View Patent ↗A wireless automation device monitors a condition and wirelessly reports an event over an automation network in response to detecting a change in the condition. The condition is sampled at a variable periodic interval, and the event reported during intervals when a change in the condition is determined. The change may be determined according to detecting a value for the condition outside a variable range. The change may also be determined according to detecting differences in the value from values detected in prior intervals. The range and the periodic interval may vary according to an analysis of multiple samples of the condition.
1. A wireless automation device, comprising:
a transceiver operable to wirelessly communicate packets of information over a wireless network;
a sensor operable to generate a indicator for a sensed condition;
a controller configured to poll the sensor at a polling interval to read the indicator during a current period of the polling interval and to selectively operate the transceiver to communicate information associated reading of the indicator; and
a memory, the controller storing a reading of the indicator during the current period in the memory, where the memory stores at least one prior reading of the indicator, the prior reading of the indicator made during a prior period of the polling interval,
wherein the transceiver is configured to transmit a most recent reading of the indicator stored in the memory during a period of a transmission interval in response to detecting a change in the sensed condition outside a predetermined range and wherein transmission of the most recent reading of the indicator stored in the memory during the period of the transmission interval is suspended in response to detecting a chance in the sensed condition within the predetermined range.
2. The wireless automation device of claim 1 where the transceiver transmits a still-alive current data after a predetermined maximum number of successive periods in which the most recent reading of the indicator stored in the memory during a period of the transmission interval is suspended.
3. The wireless automation device of claim 1 where an upper limit and a lower limit of the predetermined range may be varied.
4. The wireless automation device of claim 3 where the upper limit and lower limit may be varied according to an analysis of the most current reading of the indicator and the at least one prior reading of the indicator.
5. The wireless automation device of claim 1 where the transceiver is configured to transmit the most recent reading of the indicator stored in the memory during a period of the transmission interval in response to detecting a sensed condition beyond a band limit.
6. The wireless automation device of claim 5 where an upper band limit and a lower band limit may be varied.
7. The wireless automation device of claim 5 where the upper band limit and lower band limit may be varied according to an analysis of the most current reading of the indicator and the at least one prior reading of the indicator.
8. The wireless automation device of claim 1 where the transceiver is configured to transmit the most recent reading of the indicator stored in the memory in response to an externally-received transmission control signal received over the wireless network.
9. The wireless automation device of claim 1 where the transceiver is configured to transmit the at least one prior reading of the indicator stored in memory at the transmission interval.
10. The wireless automation device of claim 9 where the transceiver is configured to transmit the at least one prior reading of the indicator stored in memory in response to detecting a change in the sensed condition.
11. The wireless automation device of claim 1 where the transmission interval is variable.
12. The wireless automation device of claim 11 , where the polling interval is variable.
13. The wireless automation device of claim 12 , where the transmission interval and the polling interval vary according to a statistical analysis of the most current reading of the indicator and the at least one prior reading of the indicator.
14. The wireless automation device of claim 1 where the memory stores timing data associated with the most recent reading and the at least one prior reading of the indicator.
15. The wireless automation device of claim 1 where the transceiver is configured to transmit the timing data.
16. The wireless automation device of claim 1 comprising a counter associated with a number of prior readings stored in memory and not yet transmitted.
17. The wireless automation device of claim 16 where the most recent reading of the indicator and the at least one prior reading of the indicator are transmitted in response the counter reaching a maximum count.
18. The wireless automation device of claim 1 , where the sensor is configured to sense an environmental condition.
19. The wireless automation device of claim 18 , where the communication network comprises automation devices configured as a distributed building automation system.
20. The wireless automation device of claim 1 where the controller is configured to poll the sensor during a period of the transmission interval to read the indicator during a current period of the transmission interval.
21. The wireless automation device of claim 20 where the controller is configured to operate the transceiver to communicate information associated reading of the indicator during the current period of the transmission interval.