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PDS6 - sleep mode current is too high | Telit Cinterion IoT Developer Community

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SJW_Abriox's picture
SJW_Abriox

October 1, 2015 - 2:51pm, 4346 views

Hello

I'm trying to get the PDS6 into it's lowest current consumption mode. The hardware Interface Description document (v3.001), section 3.5.1, table 18  states that SLEEP2 should be between 1.2mA & 1.7mA, but I've not been able to achieve this.

When idling, with the UART active, the modem runs at about just over 15mA (at 3.8V), which more or less matches the documentation.

I've used AT^SPOW=2,1000,3, which brings it down to a baseline of about 2.6mA. I've tried deregistering the modem from the network (AT+COPS=2) but this makes no difference to the baseline current.

I'm using the PDS6 eval module mounted on a DSB75 board, with the 3.8V supply to the battery input (X602) and communicating with it via the ASC0 (X201).

Can anyone advise, please?

Thanks

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SJW_Abriox's picture
SJW_Abriox
Oct 1 2015 - 2:54pm

I probably should add that the PDS6 module is mounted on the AH6 adaptor board, which is then mounted onto the DSB75.

Bartłomiej Gemalto Moderator's picture
Bartłomiej Gema...
Oct 2 2015 - 4:24pm

Hello,

According to the documentation the UART interface should be deactivated. You are using power saving mode as I understand. Have you tried setting SPOW to 0?

This should reduce the current consumption.

Regards,

Bartłomiej 

SJW_Abriox's picture
SJW_Abriox
Oct 5 2015 - 3:31pm

I've just  tried that; it didn't make any noticable difference to the current.

Now I can't communicate with the modem as the UART is shut down.

Could you advise where I can get USB drivers for the PDS6, please?  Hopefully, then I will be able to re-activate the UART again.

Thanks.

Bartłomiej Gemalto Moderator's picture
Bartłomiej Gema...
Oct 5 2015 - 4:50pm

Hello,

You should get all the drivers and documentation from your module supplier. 

Could you also write more details how you measure the current?

Regards,

Bartłomiej

SJW_Abriox's picture
SJW_Abriox
Oct 6 2015 - 9:30am

My module supplier is having difficulty locating the drivers. Is there any chance you could advise where on Gemalto's website that I can download them?

I am measuring the current on an inline ammeter between a DC power supply, set to 3.8V, and the battery input X602.

How did Gemalto measure the current to arrive at the figures in the HID?

Regards

Steve

SJW_Abriox's picture
SJW_Abriox
Oct 8 2015 - 10:26am

Any more thoughts on this current issue?

Regards

Steve

SJW_Abriox's picture
SJW_Abriox
Oct 8 2015 - 10:27am

I've managed to get a USB driver for the eval module, by the way.

Thanks

Steve

Bartłomiej Gemalto Moderator's picture
Bartłomiej Gema...
Oct 8 2015 - 2:10pm

Hello,

These drivers are not available for download under any external link as far as I know. Generally module distributors should also have drivers and documentation. But this product is quite new and maybe that's why they have some problems with that. Usually I'm able to help in such situations because I have access to most of the released software and documentation. But in this case I also don't.

I have found a description for current consumption measurements on Multi-Adapter:

Current consumption

There's no such description for your adapter but generally you should try the same with 100mOhm resistor. You should place the resistor near the module in order to measure the current consumption of the module only.

Regards,

Bartłomiej