Wireless Sensor to Internet
Looking to explore the cheapest solution to get data from a temperature sensor to the internet. Assume you have access to a COTS router connected to the internet.
1) Wifi: A wifi module which talks directly to the router. A cheap microcontroller takes data from the sensor and sends via serial to wifi module, to the internet. 2) PAN: A dongle connects directly into the RJ-45 for a router and communicates with internet. It has a PAN (bluetooth, zigbee, etc) with another box which has the temperature sensor. The microcontroller on this box uses the PAN to send data to the dongle which sends it to the Internet.
I know both of these options are possible. Which is the cheaper option? I know wifi modules are pretty expensive.
Also, do you have recommendations of which particular chips I can use for the Wifi, Bluetooth/Zigbee and RJ-45 ethernet communications?