IT251GI Operation manual MQTT manual (German version only) Manual AT commands USB driver, version 2.12.28 Configuration software "QuickSetup", version 2.9.25 (2020-06-08) Configuration software "CONNY", Version 3.4.13 (2020-06-25) IT251GI Operation manual MQTT manual (German version only) Manual AT commands USB driver, version 2.12.28 Configuration software "QuickSetup", version 2.9.25 (2020-06-08) Configuration software "CONNY", Version 3.4.13 (2020-06-25)