In Part 1 of this series we discussed the basics of M2M cellular devices. We covered the likely forms that will be encountered and talked about the radios and the major carriers that support the different radio types. Now it’s time to talk about who makes the devices and what types of devices they manufacture.
In the early days of wireless cellular, you only had a few choices in M2M devices. They were either external “bricks” with a serial port and an antenna connection or PCMCIA style card with a fragile little antenna on them. There were only a few manufacturers of the end devices and even less choices in radios modules (or just modules engineers call them) that went inside them. Most solutions were relegated to using the external modems because unless you had a Read the rest of this entry »