Mikrokrmilniški sistem za pametno upravljanje razsvetljave

Pestotnik, Simon (author), Humar, Iztok (mentor)

Sistemi za upravljanje z razsvetljavo, ki uporabljajo protokol DMX512, se najpogosteje uporabljajo pri razsvetljavi dogodkov, stavb ter prizorišč. Zaradi tega jih je na trgu veliko, toda so pogosto cenovno manj dostopni. To delo vključuje razvoj ter izdelavo cenovno ugodnega sistema na osnovi mikrokrmilnika ESP32 ter pretvornika MAX485. Poleg krmilnega dela je izdelan tudi uporabniški vmesnik, ki omogoča preprosto in intuitivno upravljanje preko brezžičnega lokalnega omrežja s pametne naprave oziroma računalnika. Upravljanje poteka v realnem času s tehnologijo WebSocket. Po analizi je bilo ugotovljeno, da je mikrokrmilnik dovolj zmogljiv za DMX512, saj brez težav pošilja podatke s hitrostjo 250 kbit/s. Zakasnitev med pametno napravo ter mikrokrmilnikom v istem prostoru na oddaljenosti 2 m je v približno 90\% poslanih zahtev manjša od 100 ms. Sistem je bil preizkušen z devetimi napravami, vezanimi v serijo, pri čemer se niso pokazale nobene pomanjkljivosti. Test v živo je pokazal, da je zanesljivost sistema odvisna tudi od povezovalnih kablov.

• Language: Slovenian
• Keywords: DMX512, RS-485, ESP32, sistem razsvetljave, protokol, razsvetljava, digitalna komunikacija
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2023
• PID: 20.500.12556/RUL-150003
• COBISS.SI-ID: 165369091
• Publication date in RUL: 13.09.2023

Secondary language

• Language: English
• Title: Microcontroller Smart Lighting Control System

Abstract

Lighting control systems using the DMX512 protocol are most commonly used in event, building and venue lighting. Due to this widespread use, there are many of them on the market, however they are often less affordable. This work involves the development and production of a low cost system based on the ESP32 microcontroller and MAX485 converter. In addition to the control part, a user interface is also developed which allows simple and intuitive control via a wireless local area network from a smart device or a PC. The control is done in real time using WebSocket technology. After analysis, it was found that the microcontroller is powerful enough for DMX512, sending data at 250 kbit/s without any problems. The latency between the smart device and the microcontroller in the same room at a distance of 2 m in about 90\% of the sent requests is less than 100 ms. The system has been tested with nine devices connected in series, where no deficiencies were found. The live test showed that the reliability of the system also depends on the connecting cables.

• Keywords: DMX512, RS-485, ESP32, lighting system, protocol, lighting, digital communication