This smart water sensor is ideal for situations where there is no Wi-Fi infrastructure available. The sensor effectively detects humidity levels and water spillage, promptly notifying the operator through LTE or NB-IoT. Additionally, it can even automatically trigger shut-off valves. This sensor is specifically designed for remote and self-sustaining buildings. It can also be used for remote watering of plants or agriculture in solitary areas that only have long-range connectivity infrastructure.

System Benefits:

  • Monitoring of autonomous, self-sustaining buildings/infrastructure.
  • LTE-M/NB-IoT enables operation almost anywhere (network coverage assumed).
  • Solar power/rechargeable battery allows self-contained operation.
  • Detection of inappropriately high/low moisture levels or water spillage.
  • Indication to the user to shut on/off the water valve via the MQTT broker.
  • Ultra-low power LTE/NB-IoT + Low IQ DC/DC allows long operation/standby time.
  • Works perfectly aligned with the smart water actuator.




  • Smart homes and smart buildings
  • Smart civil infrastructure
  • Remote plant watering
  • Horticulture and agriculture

Winning Combinations Interactive Diagram

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4:3 ratio Connector Line.1106 Connector Line.1109 Digital Poti 128step Digital Poti 128step Digital Poti 128step Temp & Humidity Sensor Temp. & Humidity Sensor Temp. & Humidity Sensor I2C I2C I2C Connector Line Connector Line.947 Connector Line.948 Connector Line.950 Connector Line.963 Sheet.1 Sheet.2 Sheet.3 Sheet.4 EU190 EU190 EU190 Solar Cell Voltage Solar Cell Voltage Solar Cell Voltage Charging by either USB or Solar Energy Harvesting Charging by either USB or Solar Energy Harvesting Charging by either USB or Solar Energy Harvesting 5V500mAmax 5V 500mAmax 5V500mAmax 3.3V 3.3V 3.3V 1.8V-5.5V 1.8V-5.5V 1.8V-5.5V n Communication Lines B.554 n n n Sheet.42 Sheet.43 Sheet.44 Sheet.45 Sheet.46 LowBatt LowBatt LowBatt Moisture Moisture Moisture WiFi / MQTT Tx WiFi / MQTT Tx WiFi / MQTT Tx UserButton UserButton UserButton Label Text 10pt.2462 π π Moisture Electrodes Moisture Electrodes MoistureElectrodes 10µAsleep 10µA sleep 10µAsleep 0.5µAsleep 0.5µAsleep 0.5µAsleep Sheet.175 Sheet.176 Sheet.177 Sheet.178 Sheet.179 Connector Arrow.563 Sheet.181 Sheet.182 Sheet.183 Sheet.184 Sheet.185 Sheet.186 Sheet.187 Connector Arrow.563 Sheet.189 Sheet.190 BattMeasure Batt Measure Batt Measure 2 Communication Lines B.554 2 2 2 2 2 2 2 Sheet.242 Detect USB Detect USB Detect USB Measure Solar Measure Solar Measure Solar 2 2 2 2 2 Solar DC/DC Voltage Solar DC/DC Voltage SolarDC/DCVoltage 32.768kHz 32.768kHz 32.768kHz 40MHz 40MHz 40MHz Sheet.502 Sheet.503 Sheet.504 Darlington.131 Sheet.506 Sheet.507 Darlington.254 Sheet.509 Sheet.510 Darlington.254 Sheet.512 Sheet.513 Sheet.514 Darlington.131 Sheet.516 Sheet.517 Darlington.254 Sheet.519 Sheet.520 Darlington.254 Sheet.522 Sheet.523 Sheet.524 Darlington.131 Sheet.526 Sheet.527 Darlington.254 Sheet.529 Sheet.530 Darlington.254 2 .539 2 2 2 Sheet.541 2 Communication Lines B.554 2 2 2 Solar Cell Solar Cell SolarCell USB Connector USB Connector USB Connector Moisture Electrodes.604 Sheet.605 Sheet.606 Sheet.607 Sheet.608 Sheet.609 Connector Line.2799 Connector Line.2801 3.8Vtyp 3.8Vtyp 3.8Vtyp Power Switch Power Switch Power Switch 3.3V 3.3V 3.3V MPPT Control MPPT Control MPPTControl 5V 5V 5V Li-lon Charger with Power Mgmt Li-lon Charger with Power Mgmt. Li-lon Charger withPower Mgmt. MPPT 1.8V-5.5V MPPT 1.8V-5.5V MPPT 1.8V-5.5V In1 In1 In1 Connector Arrow.656 Sheet.657 Sheet.658 Sheet.659 Sheet.660 Sheet.661 Connector Line.662 Sheet.805 Communication Lines B.554 n n n In In In Out Out Out ??.814 Line.758 Line.759 Sheet.817 Sheet.818 Sheet.819 Sheet.820 Sheet.821 P-FET Switch P-FET Switch P-FETSwitch Crtl Crtl Crtl Charge Current Control Charge Current Control Charge Current Control Sheet.831 Sheet.832 Sheet.833 Charge Charge Charge Connector Line.867 In In In Control Control Control Out Out Out PMOD Type 3A UART PMOD Type 3A UART PMOD Type 3A UART P-FET Switch P-FET Switch P-FET Switch Connector Arrow.883 MQTT over LTE-M or NB-IoT MQTT over LTE-M or NB-IoT MQTT over LTE-Mor NB-IoT Signal.889 Sheet.890 Sheet.891 Sheet.892 Sheet.893 Tablet.894 Sheet.895 Sheet.896 Sheet.897 Sheet.898 Sheet.899 Signal.900 Sheet.901 Sheet.902 Sheet.903 Sheet.904 Connector Line.953 Connector Line.954 Connector Line.956 Connector Line.957 Connector Line.958 Connector Line.961 Connector Line.968 Connector Arrow.970 Connector 1.971 Sheet.1001 Sheet.1002 Darlington.131 Sheet.1005 Sheet.1006 Darlington.998 Negative Power Rail Line.758 Line.759 Sheet.999 Sheet.987 Sheet.988 Darlington.131 Sheet.1000 Sheet.997 Darlington.998 Sheet.1043 Sheet.1044 Sheet.1045 Darlington.131 Sheet.1047 Sheet.1048 Darlington.254 Sheet.1050 Sheet.1051 Darlington.254 Line.759 Connector 1 Connector Line.1055 Sheet.1065 ??.1056 Line.758 Line.759 Sheet.1059 Sheet.1060 Sheet.1061 Sheet.1062 Sheet.1063 Connector 1.1064 Connector Line.1075 Connector Line.1076 Sheet.1078 ??.1066 Line.758 Line.759 Sheet.1082 Sheet.1083 Sheet.1084 Sheet.1085 Sheet.1086 Connector 1.1074 Connector Arrow.1088 Connector 1.1089 Connector Line.1090 Connector Arrow.1091 Connector Line.1092 Sheet.589 Sheet.590 Sheet.592 Sheet.593 Sheet.594 Sheet.595 Sheet.596 Sheet.597 Sheet.598 Sheet.599 I2C I2C I2C Connector Arrow Connector 1.1099 Connector Line.1100 Connector Arrow.1101 Connector Line.1102 Connector Line.1103 Connector 1.1104 Connector Line.1105 Connector Arrow.1107 Connector Line.1108 Connector Line.1110 Connector Arrow.1111 Connector 1.1131 Sheet.1132 ??.1056 Line.758 Line.759 Sheet.1136 Sheet.1137 Sheet.1138 Sheet.1139 Sheet.1140 Connector 1.1064 Connector Line.1142 Connector 1.1149 Connector Line.1151 Connector Arrow.1152 Sheet.1154 Connector Arrow.1155 Connector Arrow.1156 V dd Vdd Vdd Connector Line.1159 Connector 1.1160 Connector Line.1162 Connector Line.1164 Li-Ion Battery Li-ion.810 Sheet.811 Sheet.812 Li Lon LI-ION LI-ION Sheet.859 Sheet.860 Sheet.861 Li-Ion Battery Li-Ion Battery Li-IonBattery + + + - - - Connector Line.1167 Connector 1.1168 Connector double arrow Connector Line.1170 Connector 1.1172 Connector double arrow.1175 Connector double arrow.1176 Connector Line.1177 Connector 1.1178 Connector 1.1179 Connector 1.1180 Connector Line.1185 Connector 1.1195 5V 5V 5V 2 2 2 2 Sheet.1219 2 2 2 2 2 Connector Line.1228 32-bit MCU 32bit MCU 32bit MCU 32bitMCU GPIO GPIO GPIO ADC ADC ADC GPIO GPIO GPIO ADC ADC ADC GPIO GPIO GPIO USB USB USB GPIO GPIO GPIO I2C I2C I2C ADC ADC ADC GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO UART UART UART GPIO GPIO GPIO HS Osc HS Osc. HS Osc. RTC RTC RTC V dd Vdd Vdd ADC ADC ADC LTE-M/NB IoT PMOD LTE-M/NB -IoT PMOD LTE-M/NB -IoT PMOD LTE-M/NB-IoT PMOD UART UART UART Vdd Vdd Vdd SIM Card SIM Card SIM Card Low Iq Buck-Boost Low Iq Buck/Boost Low Iq Buck/Boost Low IqBuck/Boost I2C I2C I2C I2C=18 I2C=18 I2C=18 P-FET Switch P-FET Switch P-FET Switch P-FET Switch Crtl Crtl Crtl Buck-Boost Buck/Boost Buck/Boost Buck/Boost Low Iq Low Iq Low Iq
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