20737 with client Rx fading?

[Anonymous]

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SDK: 2.2.1

Tag: 920737.

app: OTA hello-sensor app  .

OTA firmware size ~ 30KB.

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Description:

Our customer encounters one problem, they buy 3 devices
and put into 3 rooms, each device with its Tx power set by max. 4-dbm.

First we put devices beside client handset scanning and check client Rx ~ -50~ -60 dbm.

but after put them away from client, distance approximately 20m 25m 35m (of which
Rx is  -70dbm, -80dbm and -95dbm) and the third one is easily disconnected.

Investigation:

- already set     blecm_setTxPowerInADV(4) for 4-dbm.

- is any fading issue there in 20737 tag, any parameter related with for adjustment?

[BoonT_56 · Accepted solution]

The figures you obtained are within expectation. Of course we should expect the receive signal strength to decrease gradually according to distance, and eventually so much so resulting in a link drop. In reality where PCB-based antenna is used, the effective range could be much reduced.

[BoonT_56]

leo_su

Is this still a concern?