Then it is safe to add 1K. My devices have 10K and did not work until I added the 1K resistors.
I checked in on a scope and adding 1K fixed the waveform. -Steve > On Jan 25, 2021, at 10:49 AM, Astrid Hochart <ast...@qzabre.com> wrote: > > I just checked and they already have pull up resistors of 4.7 kohms. > > Astrid Hochart > Product developer - QZabre LLC > www.qzabre.com <http://www.qzabre.com/> > > > On Mon, Jan 25, 2021 at 4:42 PM Steve Lentz <stle...@gmail.com > <mailto:stle...@gmail.com>> wrote: > Here is the diagram for my i2c device. This shows where the pull-up > resistors are added. You will need something similar. > > But first check the documentation for the thermo-click to see if it already > has pull-up resistors. It may have 2K, 5K, 10K already. Don’t allow the > parallel resistance to go below 500 ohms. > > <PastedGraphic-1.png> > >> On Jan 25, 2021, at 10:32 AM, Astrid Hochart <ast...@qzabre.com >> <mailto:ast...@qzabre.com>> wrote: >> >> Hello ! >> >> Thank you for your reply. So I need to have a wire from Pin19 to a >> resistance and then another wire from the resistance to SCL pin of my sensor >> ? (and same for SDA and pin 20) >> >> Astrid Hochart >> Product developer - QZabre LLC >> www.qzabre.com <http://www.qzabre.com/> >> >> >> On Mon, Jan 25, 2021 at 3:59 PM evilwulfie <evilwul...@gmail.com >> <mailto:evilwul...@gmail.com>> wrote: >> You also need pull up resistors on the I2C lines >> >> On 1/25/2021 7:46 AM, Astrid Hochart wrote: >>> 19 and 20 as mentioned on the pins description ! >>> >>> Astrid Hochart >>> Product developer - QZabre LLC >>> www.qzabre.com <http://www.qzabre.com/> >>> >>> >>> On Mon, Jan 25, 2021 at 3:44 PM Vinicius Juvinski >>> <vinicius.juvin...@gmail.com <mailto:vinicius.juvin...@gmail.com>> wrote: >>> Hi Astrid, >>> >>> where are you hooking your sensor ? What pins are you using? >>> >>> Em seg., 25 de jan. de 2021 às 11:39, Astrid Hochart <ast...@qzabre.com >>> <mailto:ast...@qzabre.com>> escreveu: >>> <image.png> >>> Hello Vinicius, >>> >>> Thank you for your email. I tried what you said but I still detect nothing. >>> Is it the line with addr0 or addr1 that I should change ? >>> >>> Astrid Hochart >>> Product developer - QZabre LLC >>> www.qzabre.com <http://www.qzabre.com/> >>> >>> >>> On Mon, Jan 25, 2021 at 3:02 PM Vinicius Juvinski >>> <vinicius.juvin...@gmail.com <mailto:vinicius.juvin...@gmail.com>> wrote: >>> Hi >>> >>> You need to load a dtb to enable the i2c >>> Edit uEnv.txt file and uncomment #u_boot_overlay_addr1 and add instead >>> <file0>.dtbo add BB-I2CX-00A0.dtb where x is the i2c 1 or 2 according the >>> port you are using. >>> >>> Sent from my iPhone >>> >>> >>>> Em 25 de jan. de 2021, à(s) 10:38, Astrid Hochart <ast...@qzabre.com >>>> <mailto:ast...@qzabre.com>> escreveu: >>>> >>>> Hello everyone, >>>> >>>> I'm new to this subject but I'm trying to collect temperature data from >>>> this sensor : https://www.mikroe.com/thermo-9-click >>>> <https://www.mikroe.com/thermo-9-click> by using Python and a BeagleBone >>>> Black Rev C. The BBB is new and I don't have any SD card so I flashed >>>> nothing on it. My problem is that when I connect the sensor (where I moved >>>> the resistance to allow I2C mode) the BBB detects nothing : do you have >>>> any idea why ? Should I "enable" I2C pins ? >>>> >>>> I'll be grateful if someone can help me. >>>> >>>> Best regards, >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> <http://beagleboard.org/discuss> >>>> --- >>>> You received this message because you are subscribed to the Google Groups >>>> "BeagleBoard" group. >>>> To unsubscribe from this group and stop receiving emails from it, send an >>>> email to beagleboard+unsubscr...@googlegroups.com >>>> <mailto:beagleboard+unsubscr...@googlegroups.com>. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/beagleboard/307d5c0a-d2ff-4f0a-a914-67ad2e4fdf92n%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/beagleboard/307d5c0a-d2ff-4f0a-a914-67ad2e4fdf92n%40googlegroups.com?utm_medium=email&utm_source=footer>. >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> <http://beagleboard.org/discuss> >>> --- >>> You received this message because you are subscribed to a topic in 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