Relay Control (start refrigeration, humidifier, etc.)

[christophe-dupriez]

Relays can be added to any powered (radio)module or gateway and should be controlled using the threshold indicated for Alarms (relay setting / unsetting should result from an alarm on a given value). Conflicting alarms should be solved by specifying a priority (how?). An Hysteresis is also needed on value and/or time (15 seconds fixed time for now). As this is urgent, I suggest the relays settings to be queried periodically by the gateway and enforced by itself (locally for now). The query result would be a list of sensors with associated threshold values, comparator and relay ID and value (1=set/0=unset) and priority (0,1,2,3...) if multiple sensors are affecting the same relay.