Date: Tue, 9 Aug 2016 09:48:17 -0600 From: Warner Losh <imp@bsdimp.com> To: Gary Palmer <gpalmer@freebsd.org> Cc: "freebsd-usb@FreeBSD.org" <freebsd-usb@freebsd.org> Subject: Re: Digi Watchport/T temperature sensor as /dev/ttyU Message-ID: <CANCZdfr8Ygi_rtqF=Wi=aq3BuOVZUohz-HPg6UaBKjC-1VAXfw@mail.gmail.com> In-Reply-To: <20160809141054.GA47566@in-addr.com> References: <1469306951.84197.31.camel@freebsd.org> <20160724080330.3a27e875.ohartman@zedat.fu-berlin.de> <20160724083859.4c0dd392@ernst.home> <20160724105134.184f0b7f.ohartman@zedat.fu-berlin.de> <1469379334.84197.40.camel@freebsd.org> <CAN6yY1tUg0GeNn6hkO9NPKyKO2z58erzOYT3PkYSQ1yiX0t0Gg@mail.gmail.com> <CANCZdfoVnZHmmvNcrJgaZ2k8o6e150LGFa0svufgodn6jeJu0Q@mail.gmail.com> <1469387555.84197.48.camel@freebsd.org> <20160809083654.25d2ac67@freyja.zeit4.iv.bundesimmobilien.de> <57A9DA8F.5000603@denninger.net> <20160809141054.GA47566@in-addr.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Aug 9, 2016 at 8:10 AM, Gary Palmer <gpalmer@freebsd.org> wrote: > On Tue, Aug 09, 2016 at 08:28:47AM -0500, Karl Denninger wrote: >> >> On 8/9/2016 01:36, O. Hartmann wrote: >> > On Sun, 24 Jul 2016 13:12:35 -0600 >> > Ian Lepore <ian@freebsd.org> wrote: >> > >> >> On Sun, 2016-07-24 at 12:52 -0600, Warner Losh wrote: >> >>> On Sun, Jul 24, 2016 at 12:42 PM, Kevin Oberman <rkoberman@gmail.com> >> >>> wrote: >> >>>> There are several different USB serial drivers. Off-hand I see >> >>>> ubser, ubsa, >> >>>> uchcom, ucom, ucycom, uftdi, ubgensa, umcs, umct, umoscom, uplcom, >> >>>> usb_serial, uslcom, and uvscom. Whether any of these will support >> >>>> the TI >> >>>> chip, I can't say. Most have man pages, but a few, as has been >> >>>> noted, are >> >>>> lacking one. >> >>> I tried to automate discovery of these things. However, the only way >> >>> you can really know for sure about the TI chip is to read it's >> >>> datasheet >> >>> and compare that with extant drivers. It's actually easier than it >> >>> sounds. >> >>> >> >>> I've often thought of unification of the TTY USB drivers, since they >> >>> are >> >>> most (but not all) based on the standard plus extra bits. >> >>> >> >>> Warner >> >> To reiterate: we do not have a driver for TI 5052 chips. >> >> >> >> It's not much like other usb-serial chips. In fact it's not strictly a >> >> usb-serial chip, it's a multifunction chip that includes a software >> >> -controllable usb hub, 2 serial ports, gpio, an i2c bus master, an MCU >> >> interface, a multichannel DMA controller, and apparently even has the >> >> ability to download your own 8052-compatible microcontroller code into >> >> the 5052 and have it take over from the built-in rom code. >> >> >> >> It would be reasonable enough to write a driver that initially >> >> supported only the uart part of the chip. >> >> >> >> -- Ian >> > Now, that I know that I can not use any of our plenty Digi Watchport/T sensors >> > with FreeBSD, I'm looking for a cheap alternative of sensor, prefereably being >> > capable of taking temperature and humidity and being accessed as easy as a >> > serial terminal - as the Digi Watchport/T does with Linux. >> > >> > I still have a "resistance" changing the OS of our infrastructure to Linux due >> > to ZFS, but the very good support of drivers with the Linux OS is tempting ... >> > _______________________________________________ >> > freebsd-usb@freebsd.org mailing list >> > https://lists.freebsd.org/mailman/listinfo/freebsd-usb >> > To unsubscribe, send any mail to "freebsd-usb-unsubscribe@freebsd.org" >> >> Does hardware platform matter? If not a very inexpensive alternative >> set is found on Adafruit's site for the Raspberry Pi and FreeBSD can >> easily talk to either some of the options directly or a cheap ($10) >> 4-channel 12-bit analog board. I am using this approach with the Pi2 as >> a pool controller with multiple temperature inputs and drive (through a >> relay board) to handle both the VFD-controlled pump motor and valves, >> plus spa heater. > > If you go down that path the DS 18B20 is a digital temperature probe > that can be tied to the GPIO pins on a PI and read from python > quite easily. Don't think it does humidity, but as the temp. probes > have a hardware address you can hook multiple up to the same GPIO pin. 18B20 doesn't support humidity. The kernel also supports reading it periodically and reporting the results via a sysctl now that we have onewire support in the kernel. This has worked better for me than reading them from Python... > If you want humidity also then there is the DHT22 or DHT11, both > of which can be tied to the PI but need a GPIO pin per sensor. I > haven't tried either of them personally. Those work, but same here. I've not tried them personally. Warner
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CANCZdfr8Ygi_rtqF=Wi=aq3BuOVZUohz-HPg6UaBKjC-1VAXfw>