Dual Temperature Sensor
This device uses Murata thermistors (NTSA0XV103FE1B0) to measure 2 separate room temperatures in each module.
The curcuit consists of a PIC12F683 to read the thermistors and connect to the network. The 24k and 10k resistors on each themistor help to linearize the voltage - the rest is done in software.
The 2 modules are designated F1 and F2 on the network. Command available are are of the form
This unit automatically generates temperature reports to the clock/console unit whenever either sensor changes. These are in the form...
/C1FnAdd (where n is the unit number, 'A' designates the first sensor 'B' the second sensor, and 'dd' shows the temperature)