Fragmentation

knrid37

Hello,


We have a working Zigbee router application and need to support to transmit larger packets which will require adding fragmentation.  How can we enable fragmentation?  Is there any documentation on this?

I'm guessing I need to change APS_MAX_WINDOW_SIZE from 1 to a larger value.  Anything else?

Thank you.

TL_YB

Hi,
This parameter APS_MAX_WINDOW_SIZE does not need to be modified.
When sending a message, simply set its corresponding bit to 1, like as

epInfo_t dstEpInfo;

memset((u8 *)&dstEpInfo, 0, sizeof(epInfo_t ));



dstEpInfo.txOptions |= APS_TX_OPT_FRAG_PERMITTED;



...



af_dataSend(...);

mntdr

Hello, I’m dealing with this exact same scenario! I am trying to send a 120-byte message to my coordinator.

At first, I only set the flags: dstEpInfo.txOptions |= (APS_TX_OPT_ACK_TX | APS_TX_OPT_FRAG_PERMITTED); but the transmission still failed.

I finally got it working, but only after I changed my APS_MAX_WINDOW_SIZE setting to 2.

Does anyone know why modifying the window size was the magic fix for this? I want to make sure I understand the underlying APS logic so I don't run into memory or routing issues down the road.