Upgrading VIA UART

[Ofir_A]

Hi Team,

We are using SLM SDK 2.4.0 and MFW 1.3.5

We moving forward to SLM SDK 2.5.2 and want to FOTA all our products outside, but, some have problems with cellular reception and we would like to try to upgrade them via UART.

We can download the file on Wi-Fi to our master MCU flash and then do the upgrade via UART.

Our nRF9160 is the slave and we have a master MCU.

How can we do this upgrade?

Are there any special AT commands?

[Menon]

Hello,

I was a bit confused while reading your query. So let's clarify that first. You have a master MCU, and you are trying to update nRF9160 using the master MCU. You want to achieve this by writing an image via UART from the MCU, right? You were trying to achieve FOTA, but due to a cellular reception issue, you are sticking to transfers via UART. Is my understanding of your issue right? Please clarify or correct me if I am wrong anywhere.

I think this is achievable. I recommend you take a look at the cellular smp_server sample.

Kind Regards,

Abhijith

[Ofir_A]

Menon said:

You were trying to achieve FOTA, but due to a cellular reception issue, you are sticking to transfers via UART. Is my understanding of your issue right?

Yes

To work in the Serial LTE Modem app

[Dmitry Krol]

I didn't understand how we can use this sample for upgrade modem firmware and serial LTE application from our MCU via UART? Can you tell us how you support it?