From owner-freebsd-arm@freebsd.org Mon Mar 11 01:55:19 2019 Return-Path: Delivered-To: freebsd-arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id AAEB31527D22 for ; Mon, 11 Mar 2019 01:55:19 +0000 (UTC) (envelope-from ian@freebsd.org) Received: from outbound1a.eu.mailhop.org (outbound1a.eu.mailhop.org [52.58.109.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 876B4724A3 for ; Mon, 11 Mar 2019 01:55:18 +0000 (UTC) (envelope-from ian@freebsd.org) ARC-Seal: i=1; a=rsa-sha256; t=1552269316; cv=none; d=outbound.mailhop.org; s=arc-outbound20181012; b=eKOj41vU1gss4WLZMVJAotSpOqw5gTZlfjn7hc9ZUNSA+tVlb+nozsP9r7ogXhoAh/yq0s9Tp4R6P Q7rGqzj7kd8SQrqjTbMSl6mEL3M9LbEW6mvRMepQRpkSJa6uY+MRRPBK3D/y1oAO7OQrZAMfRy5O8N su5porcG43fKg0lfFeDn45FZgYN6loZweLNd9hElYLjzSMN3KOYAum3x8BP7UB0l5LtBDPMcVtmdkC 5TTwOSmwK79v4TyAsolPgDqgnLqD+a9kyxT9qIdzjw60MS2EtlKsxpu0dTv6Bq8vhudAm63g+o0PDy LSY+8BgFVDIft1rqW0tV4qa5p7Lts/g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=outbound.mailhop.org; s=arc-outbound20181012; h=content-transfer-encoding:mime-version:content-type:references:in-reply-to: date:to:from:subject:message-id:dkim-signature:from; bh=FsAWXboFWaULGO1+LrtjBa6awOyQqZwciNWg3gSU5N4=; b=gBRahjFemzqCxnPZ3GfjMRPod6trdyb+BelcpXMJn3yXwIaLeoU4dCo5F5VeWfgPyyc/tf/zt+803 AVgNw0S1N9Zt4JVd/3ybf7zlYJnxcPtfcviNQEE8wB5PojTM/u8shf8gjqUaQDLHUv54j0SgdESIoC iEsfFJGQ/D8HyZo9lURj2MexK5ZQZnGXM0Zs5v8bjLMrmjrPdNjAt41Wgkeg6NreBVckOtFDFNCP55 komuF9y/DjweqrGH+LozExLB08KWRSdIVTaQkLPDjH2K4H9Tf1++s4VFHmHP6RxI4OavUixE/R61N/ kxFJ9NnbqMNBrdT8vdsBcyLTDvpx2+w== ARC-Authentication-Results: i=1; outbound2.eu.mailhop.org; spf=softfail smtp.mailfrom=freebsd.org smtp.remote-ip=67.177.211.60; dmarc=none header.from=freebsd.org; arc=none header.oldest-pass=0; DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=outbound.mailhop.org; s=dkim-high; h=content-transfer-encoding:mime-version:content-type:references:in-reply-to: date:to:from:subject:message-id:from; bh=FsAWXboFWaULGO1+LrtjBa6awOyQqZwciNWg3gSU5N4=; b=DuV7LHmQ/g3GNNDzEgfy3oQ+ZJDVaHoNyzO6RAhk7Rk3/xQX1E4emgBnqWKFSm9yqDTojQVbvYg0O b1rZbahQzZtCGd5cRvSLvCmEfaeBMWHEeiV7z47cCldIMyS/oRGPWEzlpu6LHtze4uvZ9dyVDSjQI+ LStRTcYq1miu2lJrp7vO61rZxlOrOT9w1t20GkL1u3hspHn43NRgQYCv4BuDcFWBcwpJ46CUReHN+u dQigxzziF16hjzH3XDLTDXmaF2NKPJA8LgUGSgi1WBuX637gk7+ZTYHTepHsfDgIbxpGDj1+tPLCif qA2xSUqbGOL0gJ4Y2CXqHdqfVxPH+BA== X-MHO-RoutePath: aGlwcGll X-MHO-User: b462b7a5-43a0-11e9-803b-31925da7267c X-Report-Abuse-To: https://support.duocircle.com/support/solutions/articles/5000540958-duocircle-standard-smtp-abuse-information X-Originating-IP: 67.177.211.60 X-Mail-Handler: DuoCircle Outbound SMTP Received: from ilsoft.org (unknown [67.177.211.60]) by outbound2.eu.mailhop.org (Halon) with ESMTPSA id b462b7a5-43a0-11e9-803b-31925da7267c; Mon, 11 Mar 2019 01:55:14 +0000 (UTC) Received: from rev (rev [172.22.42.240]) by ilsoft.org (8.15.2/8.15.2) with ESMTP id x2B1tAao041276; Sun, 10 Mar 2019 19:55:10 -0600 (MDT) (envelope-from ian@freebsd.org) Message-ID: <6310a6e3dab9c3dfae7d23a6784f9d71f9728117.camel@freebsd.org> Subject: Re: Multiport USB hubs/switches on Raspberry Pi From: Ian Lepore To: bob prohaska , freebsd-arm@freebsd.org Date: Sun, 10 Mar 2019 19:55:10 -0600 In-Reply-To: <20190310171028.GA64290@www.zefox.net> References: <20190310171028.GA64290@www.zefox.net> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5 FreeBSD GNOME Team Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 876B4724A3 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.98 / 15.00]; local_wl_from(0.00)[freebsd.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.98)[-0.984,0]; ASN(0.00)[asn:16509, ipnet:52.58.0.0/15, country:US] X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Mar 2019 01:55:19 -0000 On Sun, 2019-03-10 at 10:10 -0700, bob prohaska wrote: > Does anyone have experience using multiport USB hubs on freebsd-arm, > specifically in the context of Raspberry Pi 2 or 3? > > I'm interested in trying to use a hub/switch (not sure there's a > difference in the case of USB) to construct a terminal server for > serial console access on a small cluster of Pi's. I'd want about > seven or eight ports, each holding a USB-serial adapter that would > then connect to the GPIO UART pins on one Pi in the cluster. I've > used both USB 3.0 and USB 1.1 hubs, and in both cases odd things > seem to happen from time to time. One potential example is > > > https://www.amazon.com/AmazonBasics-Port-USB-2-0-Hub/dp/B00GGYU46O/ref=sxin_2?keywords=powered+usb+hub&pd_rd_i=B00GGYU46O&pd_rd_r=83f1e3f0-a1e6-40aa-bdd8-aa86a7c0b360&pd_rd_w=foNmt&pd_rd_wg=ncKZR&pf_rd_p=0395a9fd-d124-46c0-a48f-d8582ed1a45c&pf_rd_r=2P9WWPAZGMAA29NMVVV2&qid=1552234319&s=gateway > > > If anyone has experience along these lines or a suggestion > for/against > particular USB devices or versions I'd be curious to know. > > Thanks for reading, > > bob prohaska > I know I've connected a hub to an rpi and didn't have any trouble with it. Probably best to use a hub that has its own power brick. Also, you can get multi-port usb-serial adapters. This is my fave: https://www.amazon.com/dp/B004ETDC8K/ There are also models that are more the size and shape of a usb hub, with DB9 connectors around the edges. If you need to connect up to four bare boards like other RPIs that have .1 headers, I spotted this cool thing: https://www.amazon.com/dp/B07JW4J7KJ -- Ian