GSM/GPRS/3G/4G/NB-IoTSensor To Cloud IoT SeriesPage 4 of 37 King Pigeon Hi-Tech. Co., Ltd Ver 1.19.7. Set Device ID..............................................................................................................................259.8. Set network parameter of SIM card............................................................................................259.9. Set server parameters.................................................................................................................. 269.10. Enable/Disable network..............................................................................................................269.11. Set Login Message......................................................................................................................269.12. Set Heartbeat Message (only for Modbus protocol).................................................................. 269.13. Set the Heartbeat Interval........................................................................................................... 279.14. Set DO output parameters (only for DO output)........................................................................279.15. Set threshold high and low (only for AIN, DS18B20, AM2301 input)..................................... 279.16. Set the range of AIN (only for AIN input)................................................................................. 289.17. Calibrate the accuracy of AIN (only for AIN input).................................................................. 289.18. Delete cache data........................................................................................................................ 289.19. Reboot Device.............................................................................................................................299.20. Restore factory settings...............................................................................................................299.21. Set device language.................................................................................................................... 2910. Transmission protocol.............................................................................................................................2910.1. Modbus RTU protocol................................................................................................................ 2910.1.1. Modbus address and example of DO types....................................................................2910.1.2. Modbus address and example of DIN types...................................................................3010.1.3. Modbus address and example of AIN types...................................................................3110.1.4. Modbus address and example of DS18B20 types..........................................................3110.1.5. Modbus address and example of AM2301 types........................................................... 3210.2. MQTT Protocol...........................................................................................................................3210.2.1. MQTT data format published by DO types....................................................................3210.2.2. Data format of control DO published by server.............................................................3310.2.3. MQTT data format published by DIN types.................................................................. 3310.2.4. MQTT data format published by AIN types.................................................................. 3410.2.5. MQTT data format published by DS18B20 types......................................................... 3410.2.6. MQTT data format published by AM2301 types........................................................... 3411. Warranty..................................................................................................................................................3512. Appendix A - SMS Instructions Table.................................................................................................... 35