I tried 1Kohms and 10kohms but I still have nothing unfortunately.. Astrid Hochart Product developer - QZabre LLC www.qzabre.com
On Mon, Jan 25, 2021 at 6:48 PM Steve Lentz <[email protected]> wrote: > I can only speak from my experience. I have three Adafruit sensor > breakouts connected on I2C bus 2. Each of these has its own 10K pull-up > resistors. The last board did not work until I added an external 1K pull > up. It is 100% reliable since then. I have built this twice and > experienced the same thing both times. I spent a lot of time chasing > software and asking questions on this forum. Five minutes with an > oscilloscope showed me the real problem was that high values on the SDA > line were not reaching 3.3V before it was sampled. Based on this, a > logical next step is to add an external 1K pull up and see what happens. > > > > > On Jan 25, 2021, at 12:35 PM, Dennis Lee Bieber < > [email protected]> wrote: > > > > On Mon, 25 Jan 2021 10:42:50 -0500, in > gmane.comp.hardware.beagleboard.user > > Steve Lentz <[email protected]> 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. > >> > > > > If I interpret the confusing schematic from > > https://www.mikroe.com/thermo-9-click there appear to already be a pair > of > > 4.7k pull-ups on the board. > > > > > > -- > > Dennis L Bieber > > > > -- > > For more options, visit 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 [email protected]. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/e70u0g58r86qs7ct4roe7b5fjpgk6pit1f%404ax.com > . > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/C6fXDoWHEg0/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/F621C5DC-2FD4-4100-847E-90E367F84602%40gmail.com > . > -- For more options, visit 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAMV76sGBHQB68%3DMmTK0j1R5gnywthXJ5GvUFjTvi2d5OumnNtQ%40mail.gmail.com.
