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Currently i am using lora from my end node to my dragino gateway and from my gateway, i push the sensor data up to thingspeak. i want to check that when my temperature graph hits above 30 it will send down a 1 or a command to my gateway and my gateway will transmit it to my end node to take action. i research and saw that react is one of the solution for on top but i do not know which action and how to use that specific action for this scenario.