Request for Antenna and Protocol Recommendations for IoT Devices

[Adarsh_N]

Hi,

We are currently in the research and development phase for a new line of IoT devices designed to work over the Matter protocol. After thorough evaluation, we found the nRF54L15 SoC to be highly suitable for our requirements due to its advanced features and multi-protocol support.

We are planning to implement the Thread protocol for device communication. Since the devices will be installed in environments with potential RF challenges (such as concrete walls), we are particularly mindful of ensuring strong and reliable signal performance. In this regard, we would like to request your guidance on:

1. The recommended RF antenna specifications (such as antenna type, gain, impedance, dimensions, and matching network considerations) that would ensure optimal performance with the nRF54L15 SoC.

2. Whether you suggest using a PCB trace antenna, chip antenna, or external antenna for our use case, considering the installation in challenging environments and possible RF losses.

Additionally, we would appreciate your suggestions if there are alternative protocols to Thread that may provide more reliable communication in environments with significant obstacles such as walls or thick materials. Our primary goal is to ensure seamless connectivity and an optimal user experience.

We would be happy to hear any recommendations or best practices based on your experience with similar applications

Regards 
Adarsh

[Adarsh_N]

Hi Edvin ,

As a part of my project in require more space on the Flash memory so I need to interface the external flash memory. So have gone through the data sheet of nRF 54L15 and I was not able to get a clear picture on how we can expand the flash memory what will be interface can be used here also what can be he max size of the flash I can use here. Also I have seen a part from the SPI, i2C , UART in datasheet it is mentioned like

 

• Up to five fully featured serial interfaces with EasyDMA, supporting I²C, SPI controller/peripheral, and UART
  • One high-speed SPIM up to 32 MHz, four up to 8 MHz
  • One high-speed UARTE up to 4 Mbps, four up to 1 Mbps
  • I²C up to 400 kHz

Could you please provide clarity on these topics.

Regards From 

Adarsh Narayan N 

[Edvin]

External flash handling is not my expertise, so please open a new ticket for that, but if you look at the matter sample NCS\nrf\samples\matter\light_bulb, then you can look at the files:

boards\nrf54l15dk_nrf54l15_cpuapp.conf
boards\nrf54l15dk_nrf54l15_cpuapp.overlay
pm_static_nrf54l15dk_nrf54l15_cpuapp.yaml

These define the external flash chip being used on the nRF54L15 DK. 

Best regards,

Edvin