AB1805 deep power down

Firmware Libraries
1

I am using @rickkas7’s library AB1805_RK

Would like to know if it's possible to change the ab1805.deepPowerDown(seconds) to minutes? It's an int so 0-255 is the max. Would like to get 1 hr deep power down out of it.

    ab1805.deepPowerDown(60);

Thanks!

2

We don't recommend using the EN pin to power down a device regularly. Doing so has a risk of damaging the cellular modem. The recommendation is to use HIBERNATE mode with RTC wake instead of the EN pin.

3

Thanks, I'm not using the EN pin, but removing power altogether from the Li+ pin (transistor/2A switching combo). I turn off everything in preparation for removing power. Do you see a problem with that?

Also, to note in my application I run in manual mode, as I use a LoRa radio to transmit back to another cell-based particle device to send data to the cloud.

4

The problem is that it's hard to determine when the device is really gracefully shut down to remove the power, so the concern still stands.

5

Thanks, I understand the concern, what about this from the Particle firmware doc...

pmic.disableBATFET();

Eather the case, is it possible to change the ab185.deeppowerdone() to minutes?

Thanks for the support!

6

The disableBATFET function is normally only used for shipping mode, and is done when the device is already idle. Any given abrupt powerdown does not have a high probability of bricking the cellular modem, but the more often you do it, you can eventually get into a situation where it's no longer unlikely to occur.

Yes, you should be able to fork the library and make that change.

7

Ok thanks, In this case, I'm not using the cell modem or Wifi.
Could you show or explain how to make that change to minutes?
Thanks

8

I figured it out, thanks for the info and help. much appreciated

9

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