问题
I faced a problem to send 1 SMS if an input is HIGH,and if it is LOW==> no SMS to send,if LOW to HIGH==> send 1 SMS. this code not working,just sent SMS when I turn the GPRS on,and after nothing is happened.
mclopez helped me,thank you,but not working :( , this is the new code that I wrote with the delay()s,but the same problem.
Thank you for helping in advance.
#include <SoftwareSerial.h>
#include "TimerOne.h"
const int DI = 2;
const int DT = 3;
const int DGP1 = 4;
const int DGP2 = 5;
const long interval = 100000; // in microseconds
int value1 = 0;
int value2 = 0;
int value3 = 0;
int value4 = 0;
int value1_old = 0;
int value2_old = 0;
int value3_old = 0;
int value4_old = 0;
boolean changed1 = false;
boolean changed2 = false;
boolean changed3 = false;
boolean changed4 = false;
SoftwareSerial SIM900 (7, 8);
void SIM900power(){
digitalWrite(9, HIGH);
delay(1000);
digitalWrite(9, LOW);
delay(5000);
}
void initia(){
SIM900.print("AT+CMGF=1\r");
delay(100);
SIM900.println("AT + CMGS = \"xxxxxxxxxx\"");
delay(100);
}
void Send_SMS(){
SIM900.println((char)26);
delay(100);
SIM900.println();
delay(5000);
}
void isr_timer(){
if (changed2) {
initia();
SIM900.println("Station 85: Defaut electrique");
delay(100);
Send_SMS();
value2_old = value2;
changed2 = false;
}
if (changed3) {
initia();
SIM900.println("Station 85: DefautGP1");
delay(100);
Send_SMS();
value3_old = value3;
changed3 = false;
}
if (changed4) {
initia();
SIM900.println("Station 85:DD>1000");
delay(100);
Send_SMS();
value4_old = value4;
changed4 = false;
}
}
void setup() {
pinMode(DI, INPUT);
pinMode(DT, INPUT);
pinMode(DGP1, INPUT);
pinMode(DGP2, INPUT);
SIM900.begin(19200);
Timer1.initialize(interval);
Timer1.attachInterrupt(isr_timer);
}
void loop() {
value1 = digitalRead (DI);
value2 = digitalRead (DT);
value3 = digitalRead (DGP1);
value4 = digitalRead (DGP2);
if (value1 != value1_old && value1 == HIGH) changed1 = true;
if (value2 != value2_old && value2 == HIGH) changed2 = true;
if (value3 != value3_old && value3 == HIGH) changed3 = true;
if (value4 != value4_old && value4 == HIGH) changed4 = true;
value1_old = value1;
value2_old = value2;
value3_old = value3;
value4_old = value4;
}
回答1:
Try slowing down the interval on the interrupt. It is possible that due to several if
statements running under isr_timer()
that the main loop may be locking up. I have a sneaking suspicion you are trying to do too much!
Be careful about trying to execute too complicated of an interrupt at too high of a frequency, or the CPU may never enter the main loop and your program will 'lock up'. Reference
Saying that and to check that your main loop is actually running why not add a simple debug at the bottom of the main loop()
to flash the on board led..
int onBoardLED = 13;
void setup()
{
pinMode(onBoardLED, OUTPUT);
// And all the rest
}
void loop()
{
// Doing stuff
if (onBoardLED == LOW) digitalWrite(ledPin, HIGH);
else digitalWrite(ledPin, LOW);
}
At least then you will know if the main loop()
is even actually executing.
It obviously runs once as you are getting a single SMS through but really with no other way of telling its a guess after that...
If all looks good try adding some further flags around the place just to see whats getting executed and what is not. Other than that suggestion i cant spot anything further but interested to find out! Best of luck
Update
Just dug this link out of my bookmarks. You may find it useful.
- Nick Gammon - Interrupts
来源:https://stackoverflow.com/questions/29818894/send-sms-for-1-time-with-arduino-gprs-sim900-if-an-iput-is-high