Posts that are aimed at explaining something
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Microchip recently lowered the price for its hardware debugger SNAP from more than €50 to less than €20. I have recently created the Python script dw-gdbserver for this and other hardware debuggers so that you can now use SNAP in the Arduino IDE 2 to debug classic ATtinys and small ATmegas. All in all, this is an affordable and care-free debugging solution for classic AVRs.
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What is the purpose of the C++ qualifier volatile, what does it have to do with race conditions, and what are Heisenbugs?
Debugging classic AVRs in the Arduino IDE 2 is finally possible! It took a while to implement this feature, but now it is just a piece of cake to enable debugging and start using the debugger.
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The featured image of this blog post is based on a picture by Gerd Altmann from Pixabay.
When you want to connect a sensor or actuator to the Internet and there is no WLAN around, then the next best option is LPWAN (Low-Power Wide Area Network). In this blog post, I will describe how to connect a sensor to a website using the AVR-IoT Cellular Mini board by Microchip.
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The featured image of this post is by Thomas from Pixabay.
What can you do to connect many I2C devices with the same device address to an MCU? Most often, the advice is to use hardware solutions. Here, we will look at how to solve the problem with software employing the FlexWire library.
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The featured picture of this blog post is by user18526052 on Freepik.
The Wire library is the one that connects your Arduino to sensors and actuators that communicate using the I2C protocol. Unfortunately, this library has a lot of shortcomings, and often you want to replace it with a different I2C library. Replacing the Wire library on a per-sketch basis turns out to be more complicated than one would expect. In this blog post, I describe an easy way to accomplish that.
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The featured picture of this blog post is by rawpixel.com on Freepik.
AVR MCUs sometimes appear to restart without you having pressed the RESET button or any other obvious reason. Is that a sign of resilience or of looming danger? How can you find the root cause?
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The featured picture is by OpenClipart-Vectors on Pixabay.
In building one’s own MCU board, one often does not use a crystal or resonator. Instead, the internal RC-oscillator is employed, which can be quite inaccurate. Similarly, if one wants to use the internal reference voltage to measure the supply voltage, it turns out that the reference voltage can deviate from its nominal value quite a lot. Both, the RC-oscillator and the internal reference voltage can be calibrated, though. In this blog post, I describe a simple method to calibrate both using only a UNO board and a multimeter employing the avrCalibrate library.
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The featured image of this blog post is by Chen from Pixabay
What is a real-time clock? Why do you need one? What are the use cases? How accurate can a real-time clock be? Which features can a real-time clock have? Which models are around? And which one should you buy?
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How do you communicate with your 3D printer? Carrying an SD card between your computer and the printer? This can end now using the SD-WIFI module! If you try to get it running on a Mac, some extra effort may be necessary.
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