Table 1—The thermostat sends these commands whenever a change occurs (i.e., you change the heat set point or the temperature falls below the heat set point).

Command type
Command
Fan F0 or F1
Mode MA, MH, MC, or MO
Heat set point Hxx (where xx = HEATSETPOINTH, HEATSETPOINTL)
Cool set point Cxx (where xx = COOLSETPOINTH, COOLSETPOINTL)
HVAC Status SI, SH, SC, or SO
Temperature Txx (where xx = TEMPH,TEMPL)
E-mail E0, E1, or E2