how to calculate 840 distance

[William.wei]

hi support team,

is there a formula to calculate the long range distance for 1 Km e? theoretically.

thanks!

regards,

William.

[Marjeris Romero]

Hi William,

There is no formula that gives a practical range, but there are some theoretical formula for line of sight, based on sensitivity and bandwith. Perhaps you can use this calculator to do estimates: https://www.bluetooth.com/learn-about-bluetooth/bluetooth-technology/range/#estimator

The values given here are practical, tested outside. Theorerically you can get about 4 times range than BLE 1M (simple) for Coded S8 (125 Kbps).

Best regards,

Marjeris

[William.wei]

Thank you Marjeris,

so in the estimator, Transmitter Antenna Gain and Receiver Antenna Gain  is 0?

regards,

William.

[Marjeris Romero]

Hi William,

Typically the gain for a PCB antenna will be from somewhere between -2dBi to +2dBi, depending on the size of your ground plane and other factors. Chip antennas usually have the antenna gain indicated in their datasheet.