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Tag Archives: digi international

Wireless IoT dev board connects to a hundred sensors

SparkFun WRL-21636-XBee-Dev board

Digi International and SparkFun Electronics have designed a development board that adds peripherals around a socket for Digi’s XBee wireless modules. Called ‘SparkFun Digi XBee development board’, it is designed for prototyping cellular IoT applications using one of several Digi’s XBee wireless modules – the socket footprint is Digi’s 13 x 19mm XBee 3 micro form factor – in particular ...

Weird & Wireless: What happened to AT&T and Bell Labs?

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Welcome again to the wonderful but sometimes weird world of wireless comms, written by Joel Young, CTO of Digi International. What happened to AT&T and the venerable Bell Laboratories? I know some of you will look at this question and say – AT&T is still around, I keeping seeing ads for all sorts of AT&T stuff. Isn’t it the largest ...

Weird & Wireless: Why do we still have freephone numbers?

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Welcome again to the wonderful but sometimes weird world of wireless comms, written by Joel Young, CTO of Digi International. Why do we still have 800/888 numbers? The toll free 800 number was born out of the long distance era. I call it the long distance era because that was where the “value” was in voice telecommunications. We have since ...

Weird & Wireless: Passive antennas and gain

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Welcome again to the wonderful but sometimes weird world of wireless comms, written by Joel Young, CTO of Digi International. Since most antennas are passive devices, how can they actually have gain? Before I knew anything about the language of radios, this was always puzzling to me. I always thought I understood it for those fancy, powered antennas. It always ...

Weird & Wireless: What happens when an RF hits an obstacle?

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Welcome again to the wonderful but sometimes weird world of wireless comms, written by Joel Young, CTO of Digi International. Let’s get beyond line of sight. What’s the definition of an obstacle and what happens when an RF hits one? In previous blogs we discussed the concept of free space loss as it relates to spherical expansion from an isotropic ...