don/node-eddystone-beacon

powerlevel doesn't seem to effect range.

Closed this issue · 5 comments

craigmulligan commented

Hi :)

I'm trying to make a hyper-localized beacon. So I have tried to change the txPowerLevel you suggest in this example. https://github.com/don/node-eddystone-beacon/blob/master/examples/url/power-level.js

I'm using googles physicalweb app to detect the beacons broadcast, and it seems to be picking up the beacon's url at the same distance (8m) regardless what I set the txPowerLevel.

Thanks in advance,
Craig

sandeepmistry commented

Hey @craig-mulligan,

The TX power level is for the measured value at 0m away (see https://github.com/google/eddystone/tree/master/eddystone-url#tx-power-level).

If you're using this library on Linux, you can try to adjust the TX power level with the following command:

sudo hciconfig hci0 inqtpl 0

and use the following command to read the current level:

sudo hciconfig hci0 inqtpl

However, the set command doesn't seem to do anything on the Broadcom and CSR USB Bluetooth 4.0 adapters I own. The power levels remain fixed and 0 and 4 respectively.

Anybody know of a way to set the TX power level on Linux?

sandeepmistry commented

Based on noble/bleno#125, it doesn't look like this is possible. So closing.

jcampbell05 commented

Is possible on CSR but with the bccm command

shotahino commented

@jcampbell05 What is the command we should use?
For example, if we want to set Tx transmit power to X dBm, what command should we use?

edweip3 commented

anyone figured out the bccm command for CSR to use to lower the TX power level?