On Tue, Jun 20, 2023 at 11:41:39AM +0200, Wolfram Sang wrote: > > > But can you elaborate on the "disappearing" bit? How exactly does it > > "disappear" when the gnss0 device is *not* opened? > > When you send an I2C message with the address of the device, it usually > ACKs it to say "Hi, I am here". When the ublox device is in reset state, > it does not ACK its address. So, tools like "i2cdetect" will not report > the device as "someone is listening there". Ah, ok, so you used it to verify that reset is working as intended. Rereading the commit message now it makes more sense, I guess I was thrown off by the reference to I2C. Perhaps adding a sentence or two about the alternate interface and using it as a means of verification would make things a bit more clear. Johan
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