function mq_connected(con)
  print("MQTT connected, con="..tostring(con))
end

function mq_disconnected(con)
  print("MQTT disconnected, con="..tostring(con))
end

function mq_client_connected(con)
  print("connected="..tostring(con))
end

local m
local topic

function mq_init(client_id)
  print("MQTT: Configuring")

  topic = "/esp8266/"..client_id

  -- client id, keepalive, username, password
  m = mqtt.Client(client_id, 120)
  m:on("connect", mq_connected)

  m:on("offline", mq_disconnected)
  -- host, port, secure, auto_reconnect, function(client), ssl=8883
  m:connect("trygvis.io", 1883, 0, 0, mq_client_connected)

  print("MQTT: Configured")
end 

function mq_publish(payload)
  m:publish(topic, payload, 0, 0)
end