RAK3172 Module boot mode issues

[hetal]

Hello,

I hope you are doing well.

I am currently facing critical issues with my RAK3172 module and STM32Cube Programmer setup and urgently need your technical support. Here are the details:

1. RAK3172 Module Issue (LoRa P2P Communication)

• Initially, the module booted up correctly, but now it does not enter boot mode.

• I receive a "baud rate not detected" error when attempting to communicate.

• The RAK Firmware Upgrade Tool fails with a device timeout error, and STM32CubeProgrammer does not work either.

• Despite this, I can still read the firmware version from the port, so I’m unsure if the IC is damaged.

2. ST-Link & STM32Cube Programmer Issue

• The device only connects in Hot Plug mode when I press the reset button.

• In normal mode, it fails to connect and shows RDP Level 0.

• Releasing the reset button causes an immediate disconnection.

• I am unable to erase the chip, even in Hot Plug mode or while holding the reset button.

Request for Support

Could you please help me resolve these issues? Specifically:

1. Are there any hardware requirements (e.g., resistors, connections) I might be missing?

2. Is there a way to recover the IC or troubleshoot further?

3. Could this indicate a hardware fault, or is it a firmware/configuration issue?

I urgently need to get this working and would greatly appreciate your prompt assistance. Please let me know the next steps or any debugging methods I should try.

Thank you in advance for your support.

Best regards,
Hetal

[Andrew Neil]

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@hetal wrote:

urgently need your technical support

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This is primarily a user-to-user forum.

If you want direct support from ST, raise a ticket here: https://ols.st.com/s/ 

It's a 3rd-party module by RAKWireless - have you tried contacting them for support?

https://www.rakwireless.com/en-us/contact-us 

https://forum.rakwireless.com/