I’m not familiar with cron jobs and have never used it. However, what I have found by web search is that you can use lynx for urls with parameters:
lynx -dump “http://ipadress/co?pw=mypassword&o23=77”
It is stated that lynx is available on all systems by default. The OS “mypassword” has to be entered MD5 hashed, see OS API Documents for details. The Weather Adjustment Method has to be set to “Manual”.