Wired node #2. Mounted inside, measures values, collects data, displays data. -Atmega 168. -MAX485 RS485 transceiver. -433 MHz rf receiver. -LCD. -MPXA4115A air pressure sensor. MCP9701A temperature sensor A simple temperature sensor from Microchip. Gives out 19.5mV/degree celsius, at 0C the output is 400mV. Connected to a analog input on the Atmega. For accuracy it has to be calibrated. I used a small can filled with snow/ice that had just melted. The output of the MCP9701 was then measures, in this case it gave xx volt.