Is there any documentation that talks about interface between board controller (nrf52840) and nrf91 on nrf91DK

[Venka Gade]

Is there any documentation that talks about interface between board controller (nrf52840) and nrf91 on nrf91DK

How do they interface. Is there sample code to create custom command set on nrf91 to which it can respond to when commands are sent from nrf52840?

[Didrik Rokhaug]

Hi.

We have some documentation here:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/boards/arm/nrf52840_pca10090/doc/index.html

https://infocenter.nordicsemi.com/topic/ug_nrf91_dk/UG/nrf91_DK/nrf52840.html

There is usually no communication between the nRF9160 and nRF52840 on the nRF91DK. The nRF52840 is used to control a set of switches that routes some of the nRF9160 GPIO pins.

However, some pins are connected between the nRF9160 and nRF52840. These are not normally used but can be used to set up communication between the two chips. One sample that does so is the lte_ble_gateway, which uses the nRF52840 as a network processor, running BLE HCI over UART.

Best regards,

Didrik

[Venka Gade]

works!