From owner-freebsd-arm@freebsd.org Sun Mar 10 17:10:40 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 6E158153A237 for ; Sun, 10 Mar 2019 17:10:40 +0000 (UTC) (envelope-from fbsd@www.zefox.net) Received: from www.zefox.net (www.zefox.net [50.1.20.27]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "www.zefox.org", Issuer "www.zefox.org" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id C6BFF85578 for ; Sun, 10 Mar 2019 17:10:39 +0000 (UTC) (envelope-from fbsd@www.zefox.net) Received: from www.zefox.net (localhost [127.0.0.1]) by www.zefox.net (8.15.2/8.15.2) with ESMTPS id x2AHATwL064372 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sun, 10 Mar 2019 10:10:29 -0700 (PDT) (envelope-from fbsd@www.zefox.net) Received: (from fbsd@localhost) by www.zefox.net (8.15.2/8.15.2/Submit) id x2AHASRD064371; Sun, 10 Mar 2019 10:10:28 -0700 (PDT) (envelope-from fbsd) Date: Sun, 10 Mar 2019 10:10:28 -0700 From: bob prohaska To: freebsd-arm@freebsd.org Subject: Multiport USB hubs/switches on Raspberry Pi Message-ID: <20190310171028.GA64290@www.zefox.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) X-Rspamd-Queue-Id: C6BFF85578 X-Spamd-Bar: +++ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [3.76 / 15.00]; ARC_NA(0.00)[]; WWW_DOT_DOMAIN(0.50)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; NEURAL_SPAM_SHORT(0.89)[0.892,0]; IP_SCORE(0.17)[ip: (0.61), ipnet: 50.1.16.0/20(0.31), asn: 7065(-0.02), country: US(-0.07)]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[zefox.net]; AUTH_NA(1.00)[]; NEURAL_SPAM_MEDIUM(0.33)[0.334,0]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MX_GOOD(-0.01)[cached: www.zefox.net]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_SPAM_LONG(0.48)[0.479,0]; R_SPF_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:7065, ipnet:50.1.16.0/20, country:US]; MID_RHS_MATCH_FROM(0.00)[]; MID_RHS_WWW(0.50)[] 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: Sun, 10 Mar 2019 17:10:40 -0000 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