Using RTC to control the real timestamp

Question

Hi Dev Team, 
 I had a task to work on that required a timsetamp to schedule a certain event, like for example I wanted my modem to start off every morning at 10:00:00 and switch off at 10:05:00. 
 What could be the best way to achieve this kind of functionality ? 
 Regards, 
 Adeel.

ovrebekk · Accepted Answer

Hi Adeel 
 I messed around with it today, and finally got it to work with some help from the developer. 
 You can find my example here: https://github.com/too1/mqtt_w_date_time 
 It is based on the mqtt_simple example, but I moved all the mqtt functions into a separate file for clarity, and added the date_time calls into main. 
 Some things worth noting: 
 1) To make date_time.c build I had to make a small change to the code. I explain this in the readme of the repository. 
 According to the developer this issue is fixed in the master branch, but was not properly tested in the v1.3.0 tag. 
 2) In order to get the time information properly he suggested I set CONFIG_DATE_TIME_MODEM =n in the project configuration (prj.conf). This prevents the library from trying to get the time from the modem, and instead accesses the NTP server. 
 3) He also suggested adding some delay between the first call to date_time_update() and date_time_now(), as you can see in my example. 
 With these things in place I am able to see the current time printed after the program has run for a bit: 
 
 Best regards Torbjørn

Using RTC to control the real timestamp

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