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Enviracom is a protocol spoken by a subset of Honeywell thermostats and other HVAC hardware. The enviracom unix daemon is a software project that will support interaction with an enviracom network, and the ability to control HVAC hardware.
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GNU General Public License version 2.0 (GPLv2)Follow enviracom
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Works perfectly with my Honeywell YTH9421C1002 Visionpro IAQ (TH9421U LCD), reads everything including the outside air temp and filter temps: Bus:0, Zone:0, Mode:, Fan:On, SetStatus:Hold, Heat:69.0F, Cool:72.0F, Room:73.0F, Outside:43.8F, Humidity:41%, Filter:23, Filter:30 Had to modify source (2 places) to get it running on a RaspPi, in elog.c: FILE * logfp = 0; // stderr; //FILE * sfp = stderr; // Not used! and in EnviracomAPIApp.c: //setpgrp(0, 0); setpgrp(); After that 'make' worked fine, modified an init.d script with the following args: DAEMON=/home/$USERNAME/enviracom/$NAME DAEMON_ARGS="-p ${pidfile}" DAEMON_ARGS="$DAEMON_ARGS -F" DAEMON_ARGS="$DAEMON_ARGS -w /tmp/enviracom" DAEMON_ARGS="$DAEMON_ARGS -l syslog" DAEMON_ARGS="$DAEMON_ARGS -s /dev/ttyUSB0" then you can telnet localhost 8587 and send commands! Thanks so much!!!