For several years now, the Raspberry Pi Foundation has been marketing 7-inch screens into which you can install a Raspberry Pi (sold separately) to create an all-in-one system. At Yoctopuce, we even have several that we use every day to monitor various experiments. But when we stumbled across SeeedStudio's reTerminal, we were keen to test it out to see if it could be used as an alternative.
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Announced a short while ago, the Raspberry Pi 5 is starting to be available. This week, we were finally able to get our hands on an 8Gb version and test whether the Raspberry Pi 4's USB stack problems have been solved.
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This week, we wanted to test Windows IoT. To do so, we decided to use a Raspberry Pi 3, our new Yocto-Bridge module and a Yocto-MaxiDisplay to implement a weighing scale.
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Even in the Internet of Things era, there are automation and measuring applications that require to work in a completely autonomous way, without any network connection of any kind. Someone asked us recently how to implement such an autonomous data logger using our sensors. The system should not require any network connection but use a USB key to retrieve the data. We are going to cover this example in details and at the same time take this opportunity to test a relatively new mini-computer that we recently discovered...
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The USB specification plans for 127 device adresses on the USB bus, and it is tempting to deduce from this that you can connect up to 127 devices on a USB port. Unfortunately, life is not as simple: this naive reasoning does not take into account all constraints imposed by USB controllers. To give you a better and more useful answer, we have decided to test what works in real life...
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