Comfortable room is one of the services that must be provided by STMIK STIKOM Indonesia campus to students. This research designed a room monitoring tool based on ESP-12E in STMIK STIKOM Indonesia. The room monitor is designed using a DHT22 sensor to measure temperature and humidity and the BH1750 sensor to measure light intensity. The tool also includes features a 16x2 I2C LCD to display measurement results. Testing is done by testing the layout circuit on the PCB and observing the measurement of temperature, humidity, and light intensity on the LCD. The test results of all layout circuits are functioning properly, and the measurement results can appear on the 16x2 I2C LCD.

The process of managing incoming and outgoing letters in government agencies is still using a manual system, recording is still using an agenda book which has several problems, such as the difficulty of administrative staff in finding old data due to the accumulation of letter data and the letter archiving process. In this study, a web-based mail archive system & SMS gateway mail archival system was created. This system can assist the process of filing letters. Testing this system using BlackBox testing. The research method uses the waterfall system development technique, consisting of several stages, namely the stages of needs analysis, system design, writing program code, conducting testing, and program implementation and maintenance. The data collection technique used is through the interview, observation, and literature study. The test results of the correspondence information system with features to manage officer data, manage incoming mail data, manage outgoing mail data, manage letter type data, manage travel letter data outside the region, and reports. This shows that the system created can function as expected.

BUMDes Catur Eka Amertha is a business entity owned by Angantaka Village, Abiansemal District, Badung Regency. BUMDes Catur Eka Amertha is the target partner of the team proposing Community Service activities. Partners have problems in the field of credit data management and accounting. Credit data management is important to ensure nominal income generated by credit units. The management system that has been carried out so far has implemented several processes from paper, excel work paper files, and accounting report files. The obstacle experienced is that the resulting information cannot be accessed directly. The constraints on access to information have an impact on the development of business development strategies. The Community Service activities proposer team applies science and technology as a solution to solving problems for partners. In the field of data management, the proposing team designed and built computer-based credit management and accounting information system. Partners are then given training in operating the management information system that has been built. The system has been implemented in the operational process of the credit business unit and has produced credit and accounting reports for BUMDes Catur Eka Amertha. The outputs of Community Service activities are increasing the application of science and technology in the community, the scientific publication of the results of Community Service activities in ISSN journals, and the publication of the results of activities in print or online mass media.