2021-03-22 23:19:39.453 (Shelly Jadalnia) MqttClient::ping
2021-03-22 23:19:49.474 (Shelly Jadalnia) Heartbeating...
2021-03-22 23:19:49.474 (Shelly Jadalnia) MqttClient::ping
2021-03-22 23:19:59.444 (Shelly Jadalnia) Heartbeating...