George, I have not seen a reply to your question on the list. So, I asked someone more knowledgeable. It is a raspberry pi specific driver for gpio. I believe it also does a few other things too. Hope this helps. Marshall - ke6pcv -----Original Message----- From: App_rpt-users [mailto:app_rpt-users-bounces@lists.allstarlink.org] On Behalf Of George Csahanin Sent: Wednesday, April 10, 2019 10:37 PM To: app_rpt-users@lists.allstarlink.org Subject: [App_rpt-users] CHAN_PI Hey guys, looking at the source I see chan_pi...what is it. I knew at one time but my aging grey matter can't find it. Reply off list if desired GeorgeC W2DB Allstar nodes 2360, 2428, 28599, 49089 -- George Csahanin 10100 Carson Ranch Rd. Crowley, TX 76036 682-708-5716 home 401-338-0568 cel