How is data shared between the nrf9160 and the nrf52840 on the Thinky91? Are there any example projects that demonstrate this?
How is data shared between the nrf9160 and the nrf52840 on the Thinky91? Are there any example projects that demonstrate this?
The source code for this sample shows it just moves data from a PC to a Thingy91 over USB. It does not show how to move data from the BLE side of the device to the Cellular side of the device. Do you have another suggestion?
I thought that this sample would cover. Have a look at the BLE HCI UART sample from the Zephyr repo.
Sorry. That does not address the issue either. The requirement for the IoT implementation is to send data acquired from BLE to the cloud over the Cellular side of the chip and then be able to receive data back the other way.
I'm sorry, I don't understand why this does not address the issue. The BLE HCI UART sample is used in the LTE Sensor Gateway, a sample that covers exactly what you are asking on the nRF9160 DK.
Can you please elaborate on why it does not work?
The example creates an H4 connection between the BLE side of the chip and the cellular side of the chip. The nrf52840 is capable of running the entire BLE stack and Application by itself. This example would require the Application run in the nRF9160. Only H4 data could be transferred between the two prohibiting any local data from the BLE processor being shared. Even if you wanted to retrieve a version number of the program running on the BLE chip, you have no way of doing it. Often message passing over shared memory is used on IoT devices to accomplish this task.
The example creates an H4 connection between the BLE side of the chip and the cellular side of the chip. The nrf52840 is capable of running the entire BLE stack and Application by itself. This example would require the Application run in the nRF9160. Only H4 data could be transferred between the two prohibiting any local data from the BLE processor being shared. Even if you wanted to retrieve a version number of the program running on the BLE chip, you have no way of doing it. Often message passing over shared memory is used on IoT devices to accomplish this task.
Another ticket with a similar question can be found here. https://devzone.nordicsemi.com/f/nordic-q-a/53279/thingy91-connections-between-9160-and-52840
The block diagram in the User Guide has a double-headed arrow between the 9160 and the 840 but no further details are given. The schematics of each chip are shown separately with no pins showing any interconnections between the two.
I'm sorry, do you mean the PIN MAP? It clearly states:
For nRF9160 P0.18 MCU_IF0 nRF52840 interface P0.19 MCU_IF1 nRF52840 interface P0.20 MCU_IF2 nRF52840 interface P0.21 MCU_IF3 nRF52840 interface P0.22 MCU_IF4 nRF52840 interface P0.23 MCU_IF5 nRF52840 interface P0.24 MCU_IF6 nRF52840 interface P0.25 MCU_IF7 nRF52840 interface For nRF52840 P0.11 MCU_IF0 nRF9160 interface P0.15 MCU_IF1 nRF9160 interface P0.19 MCU_IF6 nRF9160 interface P0.20 MCU_IF2 nRF9160 interface P0.21 MCU_IF3 nRF9160 interface P0.22 MCU_IF7 nRF9160 interface P0.25 MCU_IF5 nRF9160 interface P1.00 MCU_IF4 nRF9160 interface
You can download a complete hardware file package from here: Thingy91 - Hardware files 1_0_1.zip
Yes. That's it. Thank you.
Glad I could help! Let me know if anything else is unclear :)
Happy holidays!