nrf9160 AT-command Error

[_bhanu]

Hi,

we have designed nrf9160 custom boards.

i have upload he AT_CLIENT example but i'm not able to get response when i send commands. total i have 2 custom board but i one custom board its working but in another board its not working. Both design are same but i have noticed the nrf9160 chips is different

.

the device which have N symbol in that AT commands are working fine, but the device which have UK in that only AT response is working other then that any commands not getting ok response  i have sent AT+CFUN? but im getting response ERROR, Expect AT other commands are getting response ERROR

Thank you

[Øyvind]

Hello, 

have you had a design review of your custom design? What revisions of the nRF9160 are you using on your boards, from the image it is difficult to read anything.

Kind regards,
Øyvind 

[_bhanu]

Hi Oyvind,

Øyvind said:

What revisions of the nRF9160 are you using on your boards, from the image it is difficult to read anything.

Please look into the below image. In that which have Nordic symbol that device is working fine when in send AT commands  but another one is giving always Error response when in send AT commands, and here both board designs are same.

please check why another nrf9160 chip not giving OK response 

let me know if you need any information 

Thank you

[Øyvind]

Hello, 
Thanks for sharing! 

nRF9160's hardware version B1A is preprogrammed with the Production Test Image (PTI) modem firmware. PTI supports a subset of AT commands for testing in non-signaling mode. The modem firmware needs to be updated for signaling mode testing and end customer use.

For more information, see Production test features in nRF91 AT Commands Reference Guide.

Please update the modem FW and let me know if that helps. 

Kind regards,
Øyvind

[_bhanu]

Hi Oyvind,

Thanks for the reply.

Øyvind said:

The modem firmware needs to be updated for signaling mode testing and end customer use.

Can you please share me the supported firmware  and documentation  to update firmware

Thank you

[Øyvind]

Before doing so, can you please issue the AT command AT+CGMR on both devices? What result do you get?

[_bhanu]

Hi,

The device which have NORDIC symbol has (mfw_nrf9160_1.3.2) version and another one which have UK sumbol have (mwf_pti_nrf9160_1.1.5) version.

Thanks 

[Øyvind]

Ok, thanks for confirming that your device has PTI image. You can use nRF Connect for Desktop and the Programmer to program the wanted modem FW from the nRF9160 download page.