short range

[Zsolesz]

Hi!

I have more nrf52840 boards with pcb antenna. I would like to ask u. Maximum data change distance with 8dbm tx power is 5-6m . Is it normaly? 

[Zsolesz]

Hi,
I tested two nrf52840 Holyiot-18010 module.
The central-link was in the build and the peripheral was in the yard. I could communication between two board at a distance of 20 meters. I think is very good performance! I think there was something wrong with the PTR9818 module.
Thank you for any help!!

[Andreas]

Hi,

 

I do not think there is anything wrong with the module, but the antennas are likely affected differently if you do not mount the modules on a host PCB, as they are optimized for and designed for this. Also, the antennas are likely affected differently if you do not follow the layout/mounting requirements from the manufacturer.

Still, there is only one ground pin on the PTR9818 it seems, meaning it will not make for a very good ground plane connection with the host PCB. This will likely limit RF range also.

 

Best regards,

Andreas

[Zsolesz]

Hi,
You were right. PTR module work nice. I placed the module an other 230x230 mm PCB and I soldered the gnd to the pcb. I measured between two module 150m distance on BLE 4.0 mode.
So i had mistake on my pcb design.
Thanks for all reply.

[Andreas]

Hi,

 

Happy to help, glad it worked out.

 

Best regards,

Andreas