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Ebyte MA01 AACX2220 RS485 2DI+2AI+2DO ModBus RTU I O Module with Serial Port 5 Pin 48V DC Coil Voltage Electromagnetic Power Relay Sump Pit Overflow Alert: Install Sump Pit Overflow Alert: Install in a basement sump pit to send alerts via buzzer or IoT notification (ESP8266 ESP32) when water rises to dangerous levels and model optimizer tools Ebyte MA01 AACX2220 RS485 2DI+2AI+2DO ModBus RTU I O Module with Serial Port Support Modbus RTU protocol
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