Not much has changed since my last posting, I haven't taken the hammer out of the toolbox just yet. The rf modules are capable of 5000bps so I did move up from 2400. I've been over under and through this forum, and saw a post where bruce had use a 100k to pull down the data, if I read this correctly, line coming in to reduce noise on the input. I have monitored my data on the serial input of the 628a, looks pretty clean. I haven't had any luck getting rid of the little gremlin who pops up every now then and holds the output pin high. Anyhow I am open to criticism, constructive preferred