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12 years ago.
Wifi sensor
Hi I have a project which involve reading data from an environment (gas,temperature or spillage) using a sensor and then transmitting that data wirelessly through an Access point to a database server . I have looked at other technologies such as zig bee ,xbee and so on but at the moment I seem confused on which device to use as a connection to the access point My choice was to use a 6LoWPAN Bluetooth since it's designed to connect imbedded systems to the internet without a lot of stress
As with the database server is there a need to create an interface as a repository
I seem to be lost in all this I would appreciate it if I'm put in the right direction
Thank you
1 Answer
12 years ago.
Hi Dan,
You don't mentioned power requirements of the sensor node, which may make a big difference in determining the more ideal solution.
If you have all the power you need for the sensor, just not a wired network, then perhaps you want to implement wifi at the node, and communicate to an access point and then the database server. Example WiFi interfaces you'll find on this site: WiFly and GainSpan - both accessible from this cookbook - wireless link.
If you are extremely power limited (perhaps battery or some other constraint), then one of the other solutions may be better, but I think it will come at a trade-off. The same cookbook - wireless link shows several of the other technologies. You probably can't get directly from Bluetooth to a typical Internet connected database server. So, your node needs to connect (or mesh connect) to a BT access point which itself has access to the database server (using wired or wireless connection).
If your node must manage power very carefully, you'll have some work ahead to reduce the power consumption of the mbed and related components (there are various apis to slow down, turn off unused components on the mbed). This search link will get you started.