River Water Lever IOT APP Development for Anytime Data Checking and Alarming

River Water Lever IOT APP Development for Anytime Data Checking and Alarming Specification DC Power supply 9-28V DC (Standard adapter: DC 12V/24V/1.5A) Power consumption 2V/24V input Max. 150mA/Average 50mA GSM Frequency range Quad-frequency 900/1800/850/1900MHz SIM Card Supporting 3V SIM Card Antenna 50 Ω SMA Antenna interface Memory card SD/TF GPS Antenna external Communication interface RS-232/RS485/USB Temperature range -40°C ~ +80 °C Humidity range Relative humidity 95%