From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B94CC3276C for ; Fri, 3 Jan 2020 01:30:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1411C21734 for ; Fri, 3 Jan 2020 01:30:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="fAU3eUfL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726019AbgACBaX (ORCPT ); Thu, 2 Jan 2020 20:30:23 -0500 Received: from mail-ot1-f48.google.com ([209.85.210.48]:40214 "EHLO mail-ot1-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725872AbgACBaX (ORCPT ); Thu, 2 Jan 2020 20:30:23 -0500 Received: by mail-ot1-f48.google.com with SMTP id w21so51487487otj.7 for ; Thu, 02 Jan 2020 17:30:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=yyNRDEu2LPePcQPHEEhI8OAhLp91SJv/obThbUCivYM=; b=fAU3eUfL7FTfnmEgeCc49ubzvsbN/Xzmbp94pJH9r6rbrVSnXCzXvfKPzIMXYsPIt8 24MkPKfJ4MzfTajjrh29oy3ewHcge8H9E0NtWgu03TX4SRRhF2lEJTGba1sL/k5VMjzh UHC4k9PyI9cRKx39KeppmkucKwM8D1cFKQ0qQ7+/JOJ7Dp8QNr8Hh3Ni6utVXTxouCXq d17itKBovn/XFwCo/fnsUPZLExo6XggmUxyFBle6Gg0sc/eYnzNG+d+umntGacjTR/aD q/wlIhdpZA7SFvNtNNQuubDbl97qFXu+GLqLjG6K21uJVXzun+g/D3uHtWDbaDTZf4ch 0+LA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=yyNRDEu2LPePcQPHEEhI8OAhLp91SJv/obThbUCivYM=; b=X6nnSPiJT7rK/4QZLNypHQTLTT+LsQekhtxTrf5rDRjebMmrM0VSK50KEfopq4faEg FL8aVEVjRXsv13CLZ9Qd+/qtHuXUfzDLqXqwqwrKXGPaqcYHlylP0KGTo7XUw2zzH0+R Y7XFD5wfFvsAdJ6Z+eu46S3br/CT9iEO8jKHI+50CT2Or77Sy1TT/CT20b4q36aps1wl mQ3HxUtmR/iWQFFZcUYAVXwnD8ITalJwatmocG7iKoQf+3BazSLXrSp+xNmEOSyTKm6a xTi3V1C5LyEYzDbY2l7ZZZtmRNNwYhD3nIhjyyXp7Ye9BLRu5M70fdHqEuNcidjzh9xS Xu4g== X-Gm-Message-State: APjAAAVnSgk4fh3y/YmSf+WPGDNcP9AUCjXu/8fXekrNlrGJpYOn7WjD 1q7iCuW4RTPRYekyDhee57/nZXBMILIYLlDjS/a7QVgd X-Google-Smtp-Source: APXvYqwd4sTKj6gdxG5fMizt8mdsyaJC9ovLAicXXjtM1fBCugRRENTCiYgM7jlU98iFDDAvw/seAtO6rD9nqTe0RjA= X-Received: by 2002:a05:6830:605:: with SMTP id w5mr95888649oti.79.1578015022514; Thu, 02 Jan 2020 17:30:22 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Luiz Augusto von Dentz Date: Thu, 2 Jan 2020 17:30:09 -0800 Message-ID: Subject: Re: Problems reading characteristics with Bluez 5.52 To: Peter Belau Cc: "linux-bluetooth@vger.kernel.org" Content-Type: text/plain; charset="UTF-8" Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org Hi Peter, On Thu, Jan 2, 2020 at 5:22 PM Peter Belau wrote: > > I'm trying to get a Qardio ARM BP monitor working with Linux/Bluez but > cannot seem to read any device characteristics with Bluez. My > interaction through bluetoothctl looks like this: > > # menu gatt > # attribute-info 00002a35-0000-1000-8000-00805f9b34fb > Characteristic - Blood Pressure Measurement > UUID: 00002a35-0000-1000-8000-00805f9b34fb > Service: /org/bluez/hci0/dev_B0_49_5F_02_B5_61/service0400 > Value: > 16 7f 00 49 00 5b 00 00 00 00 00 00 00 00 35 00 ...I.[........5. > 00 00 .. > Notifying: no > Flags: indicate > # select-attribute 00002a35-0000-1000-8000-00805f9b34fb > # read > # Attempting to read /org/bluez/hci0/dev_B0_49_5F_02_B5_61/service0400/char0410 > Failed to read: org.bluez.Error.Failed > > I have bluetoothd running with debug flags but nothing appears in the > debug logs. What am I doing wrong? Look at the flags, it only has indicate so it doesn't support reading directly. -- Luiz Augusto von Dentz