init.lua
require("hvac")
hvac.begin("haier", true)
config.json
"serial": {
"s1rx": 14,
"s1tx": 27,
"s2rx": 255,
"s2tx": 255,
"s0baud": 115200,
"s1baud": 9600,
"s2baud": 115200,
"s1cfg": 28,
"s2cfg": 28
}