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CC2640R2F: CC2640R2F hciattach software error

Part Number: CC2640R2F

Dear Expert ,

Good day!

Our customer met the software error when he use the CC2640R2F, he  connect CC2640R2F to Qualcomm IPQ807X SOC via UART interface . The error message is below:

root@OpenWrt:/# hciattach /dev/ttyMSM1 texas 115200 noflow
Found a Texas Instruments' chip!
Firmware file : /lib/firmware/ti-connectivity/TIInit_0.6.34.bts
can't open firmware file: No such file or directory
Warning: cannot find BTS file: /lib/firmware/ti-connectivity/TIInit_0.6.34.bts

Since where is the TIInit_0.6.34.bts file , and I can't find it in internet ~ can you tell me where to get this file ?

By the way , the customer said Software prompt is not the latest version , 

BR,

Leon.liu