PROG readtemp
PREW ; this line instructs the SiB not to initiate a WiFi connection
     ; until a POST command is encountered
     ; this allows your program to run and read sensors with less power use
INIT counter=0 ; a variable to count how many times this has run
INIT lasttemp=0 ; the variable lasttemp is used to compare 
     ; the current temperature in the freezer to the last measured temperature
TEMP myval ; read the freezer temperature into a variable named myval
RV rvr ; read the battery level (in mv) into a variable (rvr)
; if the freezer is colder than -25 degrees celcius
; connect to WiFi and notify the owner
IF myval < -25
POST
IM Freezer appears to cold at myval Celsius
EI

; if the freezer is warmer than -17 degrees celcius and getting warmer
IF myval > -17 and myval>lasttemp
POST
IM Freezer temp above normal, at myval Celsius
EI

; increment our run counter
SET counter=counter+1
; at 20 minute intervals, 72 runs represents a full day
; send a daily notification regardless of the temperature
; and the current battery level
if counter >= 72
POST
SM My current freezer temperature is myval Celsius and my battery level is myrv
SET counter=0
EI

SET lasttemp=myval
SL 20m
LOOP