High performance digital computing devices like advanced microcontroller, plays vital role in the field of industrial and instrumentation electronic to control various physicochemical parameters. Among the various physicochemical parameters, humidity and temperature are important in the industrial process and controlling these parameters is critical. Therefore, this paper presents the ARM microcontroller based embedded system developed to control the physicochemical parameters. Utilizing the promising features of the ARM7 LPC2148 microcontroller, a prototype is developed to monitor and control the humidity and temperature. The resistive humidity and temperature smart sensor AMT1001 is interfaced with ARM7 to achieve the objectives. The digital readout is integrated in the design using the smart LCD module. The humidity and temperature are controlled with a fogger and a cooling fan which connected to the control unit through a relay. The firmware is developed in embedded C using Keil μVision5 IDE. The system under the investigation is calibrated as relative humidity in percentage and temperature in degrees centigrade. The paper discussed the design, development and implementation of the prototype along with the interpretation of the results under investigation.