Stopping and running tasks

[mikro29]

Hello everyone, How to use stop and start tasks.
Platform version 1.0.0
Modem = Quectel MC60

#include <os_api.h>
int result;
int main(){
os_task_create(led_flash_task, "led_flash", NULL,FALSE); // task ID = 1
result = os_task_resume(1);
os_task_suspend(1);
while (1) {
gpio_write(gpio_5, GPIO_LEVEL_HIGH);
os_task_sleep(500);
gpio_write(gpio_5, GPIO_LEVEL_LOW);
os_task_sleep(1000);
}
}
This is a bug = undefined reference to `os_task_resume'

Can you also give an example of how to use sleep modes? I have to put the modem to sleep and wake it up again and again. Thanks

[ajaybhargav]

This is not a bug, the underlying OS does not support these features, hence it cannot be provided in SDK.

[mikro29]

Thank you for your answer. Can you give me a simple example with sleep modes and stopping and starting a Task?

[ajaybhargav]

sleep mode is ideally not possible in case of OpenCPU design. Try playing with AT+CSCLK at command and see if that works.

[mikro29]

What I want to do is to wake up the MC60 module when triggered by an external button and send GPS and ADXL345 data in JSON format via websocket at certain intervals. I put it into sleep mode with AT+CSCLK=2, but I also make it communicate continuously via UART. That's why it doesn't go to sleep. Is there any alternative method other than waking it up with an external button when it goes into deep sleep?

[ajaybhargav]

you can send command to GPS of MC60 to make use of its AlwaysLocate feature. its a way to put GPS in low power state. Apart from that you can turn on airplane mode to disable radio activity which will lower down current consumption while application is still running.

As you have already experienced, any hardware activity or network activity will wakeup module from sleep. so try the above method to lower down running power consumption of device.

[mikro29]

For power saving AT+CFUN=4 am I correct? Is it necessary to create a websocket frame?

[ajaybhargav]

CFUN 4 will disable radios, kind of airplane mode. it will definitely save power.

Is it necessary to create a websocket frame?

I am not sure what you mean by this.