About dwm-Daemon and bridgenode

hi
what i want is gateway get userdata from bridge node using spi or uart communication

user data uplink and downlink using web-manager is easy and nice but i want custom gateway function

so i need get data from bridge node using spi or uart

when i customize and execute host apt example(ex3 les_test), getting or setting bridge node config data is good but dwm_usr_data_read or get_loc is didn’t print any data

help me plz

sorry for inadvanced english
thanks