However, you said you were using the INTx external interrupts. This effectively means that your MCU will be waking up far too often. If you need to use delay(), millis() or micros() then, unfortunately, you cannot disable Timer 0 at all, because the Timer 0 overflow interrupt makes these functions work. Then I didn’t understand, if I disable Timer 0 can I use CANGHE? The quastion is: if I disable Timer 0 it should work?Ĭan I leave Timer 0 disabled forever? (I don’t use RTC or anything like that) but I use the delay() function, can it give problems to this one? If someone (human hands) manually shuts off the water I need to know and when the flow switch goes from LOW to HIGH it should wake up the MCU and send the error message via modem. When I have the MCU in sleep and the flow switch detects the passage of water it puts the FLUSSOSTATO pin at LOW and here it is okay because the MCU wakes up and sends an alarm message via the LoRa modem.īut when I receive the opening command via modem (and the aux pin wakes me up the MCU) then I give the command to the solenoid which opens a idraulic valve and then starts to flow the water and the flow switch (INPUT_PULLUP) goes to LOW. Now the problem with “FLUSSOSTATO” remains because the operation is: ![]() OK I solved the problem with the “PLUVIOMETRO” and “aux” interrupt because in both cases I always have the HIGH pin and when an external event occurs these devices send the pin LOW and therefore these two are working thanks! Obviously I realized that these don’t work either and I should get them to work. “DATA_PLUVIOMETER” which is a rain sensor.“aux” which is the aux pin of a LoRa modem.On this occasion I say that I also have two other interrupts: So having seen everything you’ve written how do I use interrupts with Atmega2560? LowPower.powerDown(SLEEP_FOREVER, ADC_OFF, I tried not to put it to sleep and it actually works.īut I have to put the MCU to sleep at all costs. attachInterrupt(digitalPinToInterrupt(DATA_PLUVIOMETRO)) ![]() Setup() pinMode(FLUSSOSTATO, INPUT_PULLUP) ĮnterSleep() //attachInterrupt(digitalPinToInterrupt(aux), auxWakeUp, FALLING) ĪttachInterrupt(digitalPinToInterrupt(FLUSSOSTATO), flussostatoWakeUp, FALLING) I apologize, in the second answer I capitalized it but because a programmer friend told me that the defines must be capitalized and so I redid the code: I’m currently writing my second (and third!) Arduino book, and it is all about interrupts – if I ever finish it – so I’m well aware of the problems of sleep modes and interrupt triggers at the moment! What are you trying to achieve? I might be able to help.
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