Skip navigation
Of utmost importance to IoT designers is often the power budget, as battery powered devices may need to be manufactured to meet a given lifetime on a non-rechargeable battery. Efficient radios, power conversion circuitry, microcontrollers and software are necessary to make the most of the power budget while considering peak power usage demands and cost.   In this blog, I try to characterise the power consumption of the SDAWIR03 cube using a Rohde & Schwarz HMP4040.04 Bench-top Power Su ...
In this blog, I will look at the characteristics of the radio emissions from the IDT ZWIR4512 6LoWPAN modules. For testing, the module region has been set to US with 10 channels as this is seemed most appropriate for Australia where ISM operation in the 915-928MHz band is permitted. The EU region has just 1 channel with an extra 4 extension channels in the 868MHz band, which is not legal for use in Australia and thus was not tested. No other regions are offered by the IDT SDAWIR03 kit at this ti ...
In this blog post, I discuss the results of testing the sensor cube in various situations to understand what its battery life is like and how it handles extremes of temperature and humidity. I also test the gas flow sensor on the bench to see how it performs.   Data Collection Methodology Data was logged as raw json strings to file by adding a UDP output to the sensor-capture program. This was then flattened and converted to CSV using a simple Python program. # Quick IDT Wireless Sensor Cu ...
In this blog post, I will be focusing on the documentation supplied with the SDAWIR03 and the set-up process. Note that I will not be covering the Amazon AWS Cloud side of operations as I don’t currently have an account with them (and don’t wish to), but also as my RoadTest application clearly excluded this on the account that other more experienced software-developers would cover it.   Documentation The sum-total of the documentation provided by IDT on the SDAWIR03 product page ...
As with most evaluation kits, I just couldn’t wait to find out what’s inside. In this blog, I’ll take the covers off the hub and sensor cube and look closely at the parts that make up the IDT SDAWIR03 demonstration kit.   The Hub The first device to be taken apart is the hub. The plastic case unclips by prying gently at the edges to reveal the internals.   It seems that IDT have designed their own “hat” for the Raspberry Pi that contains the ZWIR4512 mo ...
In this blog, I’ll cover the unboxing process for the IDT SDAWIR03 evaluation kit, including a lot of photos.   Unboxing the Kit Thanks to element14 for swiftly and safely dispatching the RoadTest item, packed inside an outer box with bubble-wrap ensuring a safe journey all the way to Australia.   The SDAWIR Evaluation Kit comes in a white box with a colour label on the outside listing the kit contents and features. This particular version is the SDAWIR03-AMZ01-GB which come ...
Realising practical Internet of Things (IoT) projects requires careful balance of several potentially conflicting variables, which may include cost, convenience, power consumption, bandwidth, processing power and security just to name a few. Even when just considering the communications needs of IoT devices, there is rarely a one-size-fits-all solution as it depends on the individual project needs.   Looking for a Networking Technology The requirements of IoT devices contrast dramatically w ...