Attribute state in NV memory

Manuel Menchaca

Expert 2035 points

I have an issue about keeping the value of an attribute. I know that I can use NV_RESTORE and NV_INIT in order to keep the value of ZGlobals and the network state of the device.

My issue is to keep the state of the ON/OFF cluster in a HA device, is it possible to keep the state of the attribute (on or off) when the device power down and then power up?

How can I do that?

Thanks for your help

over 13 years ago

0 YiKai Chen over 13 years ago

Guru 735695 points

You can use the following example.

uint16 nv_on_off_status_id=0x0404 //Refer to ZComDef.h, 0x0404 is not used by ZStack

uint8 on_off_status=0;

osal_nv_item_init(nv_on_off_status_id, 1, NULL);

osal_nv_read(nv_on_off_status_id, 0, 1, &on_off_status); //Read on/off status from NV to on_off_status

osal_nv_write(nv_on_off_status_id,0, 1, &on_off_status); //Write on_off_status to NV

0 Manuel Menchaca over 13 years ago in reply to YiKai Chen

Expert 2035 points

Thank you YiKai Chen, your help was so useful for me.

I also want to ask you where I can find other positions in the NV in order to save more attributtes.

0 YiKai Chen over 13 years ago in reply to Manuel Menchaca

Guru 735695 points

You can check ZComDef.h and choose the IDs that are not used.

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Attribute state in NV memory