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gocchan
Associate III
July 15, 2026
Solved

How to control using DTM commands (not HCI / ACI)

  • July 15, 2026
  • 2 replies
  • 81 views

I want to use the 2-wire Direct Test Mode defined in Bluetooth Core Spec Vol. 6 Part F for RF testing of my STM32WBA custom board.

I've already tried BLE_TransparentMode. While HCI / ACI commands work, DTM commands don't respond.

Is it impossible to control with 2-wire DTM commands in BLE_TransparentMode?

Please let me know if there's any way to do this.

Best answer by Dominique FOLLEZOUR

Hi

 

Your target is to use WBA device as a pure network processor and interface it from external host MUC ?

If so indeed WBA need to be loaded with transparent mode image, this topology is named Network processor approach and you would be able to find some host mcu code here : X-CUBE-WBA | Product - STMicroelectronics

 

Br

Dominique

2 replies

gocchan
gocchanAuthor
Associate III
August 6, 2026

Since there are no sample projects that support DTM commands, I understand that I should either use HCI commands or create my own component to convert between HCI and DTM.

Dominique FOLLEZOUR
ST Employee
August 21, 2026

Hi

 

Your target is to use WBA device as a pure network processor and interface it from external host MUC ?

If so indeed WBA need to be loaded with transparent mode image, this topology is named Network processor approach and you would be able to find some host mcu code here : X-CUBE-WBA | Product - STMicroelectronics

 

Br

Dominique