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How to add a display to your battery-powered, LPWAN-connected IoT device

Monday, July 02, 2018
By HD Lee, CTO, Pervasive Displays The IoT has revolutionized numerous industries, unleashing large networks of remote sensors that send data back to central control centres. From there, it can be analyzed and distributed to operators or machines, so they can take appropriate action. In addition, the spread of mobile technology means all this intelligence can, in theory, be accessed on the go by people in the field. However, there are plenty of situations where it isn’t safe, convenient or even possible to get sensor data or instructions to a human in this way. What if they’re right next to a sensor and urgently need to know its latest reading, but have no mobile connectivity? Or what if the sensor in question is located somewhere they can’t safely use their phone to access its data? In cases such as these, a display attached to the sensor device would be enormously valuable, enabling a human operator to take appropriate action much m ..

Adding a low power display to a Maker project

Tuesday, November 07, 2017
Adding a low power display to a Maker project By Hardy Kuo, Field Applications Engineer, Pervasive Displays Have you ever thought how great it would be if you had a sign on your front door that said ‘Hello’ just as you approached to put your key in? Or you could see if you should take an umbrella to work with you, just by looking at your coffee table? Or you knew if you were running low on sugar just by glancing at the closed cupboard door? If the answer to any of these questions is ‘Yes’ then you’re probably already a Maker. If it’s ‘Yes please!’ then you’re a Maker in the making and you might just be looking for e-paper displays. Accessing technology for your project The number of single-board computer modules available to Makers is on the increase. Platforms like the Raspberry Pi ( family give everyone access to technology that, not so long ago, would only have been available to lar ..

Why e-paper displays will run for 22 years in coin cell powered IoT applications

Wednesday, November 02, 2016
Why e-paper displays will run for 22 years in coin cell powered IoT applications? By Scott Soong, CEO, Pervasive Displays You’ve carefully selected your sensor, found the lowest power MCU for your battery-powered IoT application, optimized your code to minimize energy consumption and chosen the lowest power wireless solution to send packets of data where they need to go. Now you want to figure out how to add a display to your application without completely trashing the power budget. That’s the challenge faced by many IoT product designers, for example those designing remote meters or smart tags. If they think only in terms of dot matrix displays, it’s a challenge they’ll struggle to overcome. Let’s assume that you want your display to operate for five years with CR2032 coin cell batteries as the power source. These have a typical stated capacity of 220 mAh, from which we might reasonably assume a nominal real-world operating capacity of 88% ..