Single-side TWR examples

i’m start using ss_twr example to one init node get distance of each response node
and not use PANS(it is great but unsuitble my application)

I know what i have to do is modify tx_poll,rx_poll, tx_resp,rx_resp with reference to DWM1001 system overview and 802.15.4 and figure 1, page 6 in APS016

I read the documents, but I don’t understand

just increase frame size and send group poll msg payload using tx_poll_msg?
if it is true, how set resp node seet number?
need any setting like framefilter?

can i get examples?

thank to read

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Additionally what is the 0xE0?
static uint8 rx_poll_msg[] = {0x41, 0x88, 0, 0xCA, 0xDE, ‘W’, ‘A’, ‘V’, ‘E’,/* 0xE0*/, 0, 0};
this function code is not match any 802.15.4 data frame payload