New version of iRelay+ firmware (6.8.3)

In the new firmware version, the stability of the MQTT connection to the server has been improved. Further upgrades will be based on MQTT to improve communication and integration on homeassistant. Due to the increasingly frequent price increases of cloud services, the tendency is for people who use IOT technology to switch to their own private server such as homeassistant and to no longer depend on expensive alternatives.