Author Archives: James

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Galaxy S7: both Qualcomm and Samsung chips seen by OpenSignal

The Galaxy S range has always embraced multiple variants – the S6 for example comes with about a dozen different internal configurations (the cell radios and sensors they used). Some of this is unavoidable, CDMA networks aren’t going to work … Continue reading

Posted in Crowdsourcing, Mobile Trends, Other, Sensors | Tagged , , , | Leave a comment

Go slow: how & why to test apps on poor connections

One of the recurring themes at OpenSignal is the staggering diversity of mobile experience. We see it in our Fragmentation Report on Android device models and in our Sensor Library. Phrases like “mobile first”, “responsive” sweep this complexity beneath the … Continue reading

Posted in Android Development, Connecting the World | Leave a comment

New OpenSignal live wallpaper: know your signal strength

Your phone signal is important, so why is it that the signal strength bars are tiny? The Nexus 6 has a screen of 1440×2560 pixels, the signal bars and technology indicator (that text that says “4G”, if you’re lucky) take … Continue reading

Posted in Android Development, LTE, Understanding signal | Leave a comment

The Ladder of Possibilities

“Nothing is impossible” is a curious phrase. Despite its patent falsehood it is rarely challenged. A short Levenshtein distance away is “This is not impossible”, which is far more likely to hit the mark of truth and is usually what … Continue reading

Posted in Philosophy, Sensors | 1 Comment

StormTag fully funded

Jan 2016 note: We no longer endorse StormTag. Regrettably, in the time since posting the below, Hex3 have become slower and slower in their followup. Over the past several months we have no update on the status of StormTag, to … Continue reading

Posted in Sensors, WeatherSignal | 1 Comment

A $20 Weather Station

Jan 2016 note: We no longer endorse StormTag. Regrettably, in the time since posting the below, Hex3 have become slower and slower in their responses. Over the past several months we have no update on the status of StormTag, to … Continue reading

Posted in Sensors, WeatherSignal | Leave a comment

Mobile: The Measure of All Things (Big Data Week talk)

These are the slides from a talk I gave at Big Data Week London 2014. We carry take our mobiles with us wherever we go, we keep them fuelled with energy and, typically, there’s no other object we own that … Continue reading

Posted in Sensors, Team, WeatherSignal | Leave a comment

Help Needed: Mapping LTE Bandwidth

There are multiple factors that influence the data speed you experience: the device you use, the network operator, the time of day, the signal quality where you are. We’re building models of how these factors come together, we’ll be publishing … Continue reading

Posted in Help Needed!, Open Signal Maps community, Understanding signal | Leave a comment

Join the OpenSignal and WeatherSignal Beta

We’re making it easier for the OpenSignal/WeatherSignal Android community to access and test the latest features by introducing a Google Play Beta Program. By joining the Google+ beta communities and then opting-in to receive updates, you’ll get the latest development … Continue reading

Posted in App Update, Help Needed!, OpenSignalMaps Android App, Quantified Self, WeatherSignal | Leave a comment

Does the Galaxy S5 have temperature and humidity sensors?

tldr; No. The Galaxy S4 surprised the world by adding Sensirion’s SHTC1 chip – a tiny, low power chip that can take accurate measurements of relative humidity and ambient air temperature. These readings are used in S-Health, we also collect … Continue reading

Posted in Sensors, WeatherSignal | 5 Comments