From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yw1-x1130.google.com (mail-yw1-x1130.google.com [IPv6:2607:f8b0:4864:20::1130]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id F008B3CB37; Mon, 13 Nov 2023 18:50:30 -0500 (EST) Received: by mail-yw1-x1130.google.com with SMTP id 00721157ae682-5afa5dbc378so52211027b3.0; Mon, 13 Nov 2023 15:50:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1699919430; x=1700524230; darn=lists.bufferbloat.net; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=7pV05QQi01RqVh2DLmc36c/HyRyBkDHXJu4xGRY7Ugs=; b=Z3Ntc+kWC4wLBx4Om6pQ7512hFYZYyYBHzPppHajWOrRWFGnJFpcDg5/hgfmeg0Ih2 Ce73048iB9DmcvGfQwbw1072nmniuVqKd+wOLebHxr2LRaEWPQOZd/wt9WL89e/H3vmH fXhEEMTrop73eLzvS5XX32+/HMRpPtAqZU8mGNf1tvHGGmpISgmgU4PVi9tByeyEE+ZU lgnA5aeyKlP0YK32d1nqLAjFquWjGrs8rRuKDi4fwkWFpza8GaZyJvKd4Zdded1RPcS3 7pnf6aLbGbS3F1U+jf6EORYKDif9oVNDbqrBYTr9B5XColy+XBuhdEpjVZIWv0AjIpjP BAww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699919430; x=1700524230; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=7pV05QQi01RqVh2DLmc36c/HyRyBkDHXJu4xGRY7Ugs=; b=O9EJR+oUHpqc9Bu+J2C5bygJYbLD3jiKhvjA7wT0GgIlMNuldm0X7TIYSyUo/fpBNb Gy/Lvk+jyfILQgM19BFEsVIzmUTtNukIGvc94VBpt8B7PrPN/Lx61WeHz13bBdAko4zV Ww4jdN9hZwMl+qztV3wz6B1kHZOzNdvVOkFLlb6DLZsCj+MkW5K/6kLdgEkRIczfsGgZ UmsydsCNanYulk0cB1I/be2oy0HTK/QG4s0KcfiYtjckTx3nKvgBwzSJJ89Kq9x3CSUC ijDF4lyIh+89TbQYpgvoNKev8+wYBeExffi+a2cQism/g5D2jqXiV9cP1WualClsJer5 rbOg== X-Gm-Message-State: AOJu0Yw/Qpz9+3io2whPHt+ZoT9hOiV8Fn+fFBiEDVsJ3JYsFh5Gtxh6 J+t0SogKnpjoTpdU/hgvH5W2dARZNCDNyreXgYUKKzxXf8Q= X-Google-Smtp-Source: AGHT+IGtYOpQ69n0vWZMzt5/q4IlHb7fI4nRORS47VpXAJ1+xwzgzzbyGo2pLSFh8n5fF5xnAhuO8q5vWXdimJsCles= X-Received: by 2002:a25:ce85:0:b0:d9a:5220:d6b3 with SMTP id x127-20020a25ce85000000b00d9a5220d6b3mr5630972ybe.56.1699919430105; Mon, 13 Nov 2023 15:50:30 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: dan Date: Mon, 13 Nov 2023 16:50:18 -0700 Message-ID: To: Dave Taht Cc: =?UTF-8?Q?Network_Neutrality_is_back=21_Let=C2=B4s_make_the_technical_asp?= =?UTF-8?Q?ects_heard_this_time=21?= , Dave Taht via Starlink Content-Type: multipart/alternative; boundary="000000000000c743cc060a115523" Subject: Re: [NNagain] bluetooth occupancy sensing X-BeenThere: nnagain@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: =?utf-8?q?Network_Neutrality_is_back!_Let=C2=B4s_make_the_technical_aspects_heard_this_time!?= List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 13 Nov 2023 23:50:31 -0000 --000000000000c743cc060a115523 Content-Type: text/plain; charset="UTF-8" I also have bluetooth occupancy sensors lol. We have a lab test going of triangulated bluetooth tag locating. So you put a BLE tag on a device and *3* or more receivers in a space at different locations and heights which are documented and then BLE tags are triangulated based on RSSI. Having sensors at various heights allows for tracking even the 'z' axis. These tags are very cheap, you can buy complete tags for a couple of bucks, don't even have to build your own, and you can get them built into cutable (or non-cuttable) wristbands. You can also do short-term tracking of cell phone beacons, though privacy mode means that you only get a short 'session' with a phone (because of privacy mode on newer phones) that isn't paired with something but if you have a phone with a bluetooth headset, the 'locks' the bluetooth mac address and now you can track the phone anywhere that the bluetooth headsets follow. You can also track cars which don't scramble the mac, but you get cars with wifi mac as well. We can get bluetooth to within inches accurate when it's line of site. In a pocket or something it's about a meter because bodies/clothes etc reduce RSSI unevenly. The purpose of this is a couple of things, 'patient tracking' in any sort of a facility like nursing home or hospital, and device tracking, again in a facility with shared hardware like portable EKGs and handheld XRays etc that get 'misplaced' and staff has to go on a hunt for. It's also much cheaper than lorawan as BLE transmits many times a second and runs for years while lora is built for more range and only transmits intermittently, usually 10-60 minutes to preserve battery. We're testing mainly on dragino and milesight devices. I'm also having decent enough luck with mikrotik's knot which can track BLE beacons with high enough precision. Mikrotik has their own somewhat expensive BLE beacons also but these are basically universal. --000000000000c743cc060a115523 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I also have bluetooth occupancy sensors lol.=C2=A0 We= have a lab test going of triangulated bluetooth tag locating.=C2=A0 So you= put a BLE tag on a device and *3* or more receivers in a space at differen= t locations and heights which are documented and then BLE tags are triangul= ated based on RSSI.=C2=A0 Having sensors at various heights allows for trac= king even the 'z' axis.=C2=A0 These tags are very cheap, you can bu= y complete tags for a couple of bucks, don't even have to build your ow= n, and you can get them built into cutable=C2=A0(or non-cuttable) wristband= s.=C2=A0 You can also do short-term tracking of cell phone beacons, though = privacy mode means that you only get a short 'session' with a phone= (because of privacy mode on newer phones) that isn't paired with somet= hing but if you have a phone with a bluetooth headset, the 'locks' = the bluetooth mac address and now you can track the phone anywhere that the= bluetooth headsets follow.=C2=A0 You can also track cars which don't s= cramble the mac, but you get cars with wifi mac as well.

We can get = bluetooth to within inches accurate when it's line of site.=C2=A0 In a = pocket or something it's about a meter because bodies/clothes etc reduc= e RSSI unevenly.=C2=A0 The purpose of this is a couple of things, 'pati= ent tracking' in any sort of a facility like nursing home or hospital, = and device tracking, again in a facility with shared hardware like portable= EKGs and handheld XRays etc that get 'misplaced' and staff has to = go on a hunt for.=C2=A0 It's also much cheaper than lorawan as BLE tran= smits many times a second and runs for years while lora is built for more r= ange and only transmits intermittently, usually 10-60 minutes to preserve b= attery.

We're testing mainly on dragino and milesight devices.= =C2=A0 I'm also having decent enough luck with mikrotik's knot whic= h can track BLE beacons with high enough precision.=C2=A0 Mikrotik has thei= r own somewhat expensive BLE beacons also but these are basically universal= .
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