GSM 3G 4G LTE SMS Modbus RTU Temperature Monitoring Alarm Gateway

It can be operated from anywhere without distance restrictions. GSM temperature monitoring alarm can reject calls from authorized numbers without making a call. Multiple applications (temperature, power state, solar panel, DC voltage). Up to 10 authorized phone numbers, 5 can be used to answer calls or text messages, and 5 can be used for calls and text messages to generate alarms. A DS18B20 temperature sensor input with a temperature range of -55- + 125°C and an accuracy of 0.5°C. Monitor external AC power status, AC on/off will send SMS to authorized phone number. The built-in MCU has a measurement range of 9-36 VDC, eliminating the need for additional sensors and saving costs. Set it once every once in a while (the user can set the time by himself) and automatically send its status to the authorized number. Support remote reading of historical data via SMS.