on | off slow as hell to respond

Hardware Arduino GSM Shield
1

Digital pin 7 controls on / off for the GSM arduino modem.

I'm just doing some testing, so that I can turn the gsm modem on | off whenever I please (to save a to of battery hopefully it does not draw a hella lot of battery when it's in the off state...)

Problem: HIGH (on) is very quick and happens immediately. LOW (off) of the modem takes wayyy too long. It takes what seems like 1 minute after I call the function digitalWrite(xyz, LOW).

What's going on here? Is it because it has to connect to a network and do a power down sequence or something?

also if anyone knows the power draw for the gsm modem in an off state, kudos to you.

const int gsm_power = 7; // digital pin 7 controls the power for the GSM Arduino modem

void setup() {
pinMode(gsm_power, OUTPUT);
Serial.begin(9600);
}

void loop() {
digitalWrite(gsm_power, HIGH);
Serial.println("setting to high");
delay(1000);
digitalWrite(gsm_power,LOW);
Serial.println("setting to low");
delay(100000);

}
2

What do you reckon - this may have something to do with it --

delay(100000);

-- in the main loop()

3

lastchancename:
What do you reckon - this may have something to do with it --

delay(100000);

-- in the main loop()

Why would that affect anything?

That delay only controls the loop from starting over again.

This function is called first:
digitalWrite(gsm_power,LOW);
Serial.println("setting to low");

then there is a delay, until it loops over again and turns the device on again.

I'm not sure how the delay would precede the function before it?

4

The delay has absolutely nothing to do with it. I have been debugging this for a few days now. It has to do with the fact that high is a 1 low is a 0. So depending on what state it is, if it's already high and I set it to high nothing happens, same with low.