UART thingy91

Hello,
I recently purchased a Nordic Thingy 91 device, and I have been working on it for a few weeks. I am currently experiencing two major issues with the kit that are preventing me from moving forward in my research, which is why I am posting here today.
  • My first issue is that after acquiring data from the nRF9160 board, I am unable to send it to the nRF52840 board. How can I perform this data transfer between the 2 boards mentioned above via UART ports ?
  • Moreover, I am unable to establish a Bluetooth/BLE connection between the nRF52840 and my phone or my computer. How can I enable Bluetooth on the nRF52840 and how can I link a phone to the board or to a computer ?
Thanks in advance for your feedback !
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