Use scan BLE with Raspberry Pi

[Elisa Druart]

I’m currently working on node-red in a raspberry Pi. I try to use the node scan BLE.

I can see that Bluetooth is running thanks to the “started”, but when I deploy, I have only these messages. I don’t understand what does “Adapter state: unauthorized” mean…

[[Image joined]]

So in order to see if the problem come from node-red or the Raspberry, I decide to follow these steps: https://mcuoneclipse.com/2016/12/19/tutorial-ble-pairing-the-raspberry-pi-3-model-b-with-hexiwear/comment-page-1/#comment-88689 . The difference for me is: I have a glucometer using BLE. I can read some data in the glucometer, but, it disconnects after a while (the parring works on the raspberry but not in the device…)

If somebody have an idea?  I don’t know if I need some hardware or others libraries…

[Per Thomas Jahr]

Usually you have to set some more permission in order for the adapter to do a scan. Try with the command: 

sudo setcap cap_net_raw+eip $(eval readlink -f `which node`)

Also see her for more info:

https://github.com/sandeepmistry/noble#running-without-rootsudo

--

Per Thomas Jahr

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