Low power mode (possibly power down and wake periodically) with ATSAMD21G18A

[kalon33]

Hi,

I’ve a Seeeduino LoRaWAN based on ATSAMD21G18 processor, and would like to power down it (or deep sleep it) for 5mins, then wake it up, and power down it again… for weather station and reporting use. I don’t have any external module to wake it up currently.

Is this possible with Low-power library? How can I do that?

Thanks for your help.

[LIM PHANG MOH]

Hi,
Take a look at our guide here. You don’t have to use our low power library for that as the RTCZero library has a function call to put it into standby mode (lowest deep sleep mode).
Or you can take a look at our TTN guide.

[kalon33]

@sparky: Does that also work on Seeeduino LoRaWAN (that has ATSAMD21G18A microcontroller)? How?

Thanks for your help

[LIM PHANG MOH]

I don’t think it’s hard to use the same code base for the Seeduino LoRaWAN. It’s basically replacing the LMIC portion (SPI based) with the RHF76-052AM portion (UART based). I have never use that RHF76-052AM module, so I’m not sure.

[tzeeth]

Hi I am reviving this post for asking what part of my code is bad because it doesn’t work.
I am using

const uint8_t seconds = 0;
const uint8_t minutes = 00;
const uint8_t hours = 10;
const uint8_t day = 20;
const uint8_t month = 2;
const uint8_t year = 17;
void setup 
rtc.begin();
  rtc.setTime(hours, minutes, seconds);
  rtc.setDate(day, month, year);
  rtc.setAlarmMinutes(1);
  rtc.enableAlarm(rtc.MATCH_SS);
  rtc.attachInterrupt(alarmMatch);
  USBDevice.detach();
  rtc.standbyMode();

void loop

rtc.begin();
  rtc.setTime(hours, minutes, seconds);
  rtc.setDate(day, month, year);
  rtc.setAlarmMinutes(1);
  rtc.enableAlarm(rtc.MATCH_SS);
  rtc.attachInterrupt(alarmMatch);
  USBDevice.detach();
  rtc.standbyMode();

My Arduino is MKR1400 GSM and I want to be able to send some sensors reading and then sleep for 10 hours, waking up send again and sleep in a cycle.
Thanks for you effort and your good libraries.

[Author]

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