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Sender: "piclist-bounces@mit.edu" Date: Thu, 1 Oct 2020 13:03:49 -0700 Subject: Re: [EE] RS-485 analyzer/sniffer? Thread-Topic: [EE] RS-485 analyzer/sniffer? Thread-Index: AdaYL+upNhcu62NkQ/m11JUV1fswzg== Message-ID: References: <5F7619A5.1030407@narwani.org> <5F762F17.2080803@narwani.org> List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: <5F762F17.2080803@narwani.org> Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: TempError X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Fail (protection.outlook.com: domain of mai.hallikainen.org does not designate 208.80.15.114 as permitted sender) receiver=protection.outlook.com; client-ip=208.80.15.114; helo=mailscanner.virtbiz.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mitprod.onmicrosoft.com; s=selector2-mitprod-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=dJXfY+LpJqlUKINKs/q7EQbZrDx7i1weBeZfi64yxGQ=; b=Zc8c0E4XGQv91DVoIsaeWcvXvIIaqJRh9dYc49l3CAitwAY0IpreQN9Yiv6allv5MbxFPYrIaeGkxH3vsX3buZwxttXINe8BUNf+pYk8mBqQTErrKNqBAdRqePRwS4vtT0XyNBPrw3wgU7SpM56XfO+cMFYXByF4cyrMCFD2Wzc= authentication-results: spf=fail (sender IP is 208.80.15.114) smtp.mailfrom=mai.hallikainen.org; mit.edu; dkim=none (message not signed) header.d=none;mit.edu; dmarc=permerror action=none header.from=mai.hallikainen.org; user-agent: SquirrelMail/1.4.22-5.el6 errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-authentication-warning: mai.hallikainen.org: apache set sender to harold@mai.hallikainen.org using -f x-spam-status: No x-greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mailscanner.virtbiz.com [208.77.216.252]); Thu, 01 Oct 2020 15:03:55 -0500 (CDT) x-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 I've used a logic analyzer like the thech-tools DigiView to watch a 485 bus directly. No 485 receiver required since one wire or the other is 5V serial data. Also, RealTerm can capture serial data and display it in hex. I use an FTDI TTL-232R-5V-WE cable to get TTL or similar level data into a USB comm port. Harold --=20 FCC Rules Updated Daily at http://www.hallikainen.com Not sent from an iPhone. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .