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Internet of Things (IoT) is the interconnection of several devices that have specific tasks such as sensing and control. The services in the system can be in the form of one device - one service, many devices - one service, one device -many services, and many devices - many services. A communication protocol is agreed upon by the devices in the IoT system to ensure the success of data transactions. These protocols include MQTT, HTTP, AMQP, XMPP, Web Shocket, and COAP. This study compares the performance of the COAP and HTTP protocols in consideration of the number of transactions and energy consumption. The scenario used is to send RSSI data and battery level. The scenarios also use two modes of transmission power:14dBm and 20dBm. The results show that the COAP protocol is 25 times more efficient than the HTTP protocol for a 20dBm transmit power scenario, while for a transmit power of 14dBm COAP is 61 times &nbsp, Internet of Things (IoT) merupakan interkoneksi beberapa perangkat yang memiliki tugas tertentu misalnya penginderaan dan control. Layanan dalam sistem tersebut tersebut dapat berupa satu perangkat satu layanan, multi perangkat satu layanan, satu perangkat multi layanan, dan multi perangkat multi layanan. Sebuah protokol komunikasi disepakati oleh perangkat dalam sistem IoT untuk menjamin keberhasilan transaksi data. Protokol tersebut antara lain MQTT, HTTP, AMQP, XMPP, Web Shocket, dan COAP. Penelitian ini meembandingkan unjuk kerja protokol COAP dan HTTP dalam hubungannya dengan jumlah transaksi dan konsumsi energi. Skenario yang digunakan adalah dengan melakukan pengiriman data rssi dan level daya baterai. Pengujian dilakukan dengan membedakan daya transmisi perangkat sebesar 14dBm dan 20dBm. Hasil pengujian, protokol COAP lebih hemat 25 kali dari protokol HTTP untuk scenario daya transmit sebesar 20dBm sedangkan untuk daya transmit sebesar 14dBm COAP lebih hemat 61 kali dibandingkan dengan protokol HTTP.

This study modeled the interference between the Lora system signal in the AS2 frequency band and a non-Lora radio signal. Two Lora devices operate on uplink and downlink at a frequency of 923.2MHz to send and receive data on the bandwidth of 125KHz, 250KHz, and 500KHz. The interference generator device is composed of a single board computer installed by the RPITX application. In addition, there is a GNU-Radio application to monitor data and signal transmission levels. Signal quality tests (RSSI, SNR, and time-on-air(ToA)) were carried out under line-of-sight (LOS) conditions and used reference distances of 1m and 4m. The ToA test shows that the greater the bandwidth, the smaller the ToA value, while the change in distance does not affect the ToA. The RSSI test shows that the change in distance affects the RSSI value more significantly than the change in bandwidth. The presence of an interference signal does not significantly affect the RSSI value. SNR testing shows that the greater the bandwidth, the smaller the SNR and significantly decreases when interference occurs. &nbsp