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The demand for water meter monitoring has become urgent nowadays. For this reason, this research aims to develop a LoRa network for water meter infrastructure applications. We have designed a low-power measurement node using an 8-bit microprocessor and LoRa transceiver by connecting software for monitoring water consumption and remote data transmission. In this study, several schemes were made to measure Lora data transmission performance for point to point and mesh networks. The results showed that the LoRa value and the TX power and spread factor (SF) value, which was higher, could increase the data transmission range for point-to-point network schemes. SF 8 provides the most optimal data transmission performance in a mesh network scheme, both in direct transmission and multiple hops. The packet delivery rate is measured at 100%, with an average ping time of 582 ms for each hop. This design increases the time interval and reduces transmission failures in times of data congestion. Implementing a LoRa-based mesh network in residential areas automatically builds data transmission lines and connects with surrounding nodes to build a mesh network. Percentage of PDR measured for each node in the network above 97%. [ABSTRACT FROM AUTHOR]

The use of the coral reef as a source of community livelihood on Tidung Besar Island has negative impacts on the coral reef itself. Students of SMKN 61 Jakarta are a small part of the Tidung Besar community that is involved in coral reef conservation efforts on Tidung Besar Island. Efforts to build social sensitivity can be conducted at schools through co-curricular education activities. Co-curricular activites are activities to add to, supplement or replace intracurricular learning, which is according to the curriculum. This learning is in line with informal education, which has functions as a complement, supplement and substitute. This is in accordance with the Indonesian national education system, nonformal education and family education. Students are required to have social sensitivity to the environment so they will have a sense to maintain and improve coral reef sustainability. Conservation education, which is a nature conservation strategy, is essential for inclusion in school learning. The purpose of this research was to increase social sensitivity about coral reef conservation in students of SMKN 61 Jakarta through coral reef conservation education. This research was conducted on October 20th-21st, 2017 at SMKN 61 Jakarta. The research method was quasi-experimental with a one group pretest-posttest design. The sample consisted of 32 students. Hypothesis testing by t-test demonstrated that coral reef conservation education had an influence on the students' social sensitivity to coral reef conservation. [ABSTRACT FROM AUTHOR]