Development of a Bluetooth Based Automatic Nitrogen Valve Control System for Enhancing Nitrogen Efficiency in SMT Reflow Oven Processes: A Case Study at PT XYZ

DOI

10.2991/978-94-6463-982-7_34How to use a DOI?

Keywords

Reflow Soldering; Nitrogen Gas Efficiency; Bluetooth Communication

Abstract

Reflow soldering is the process of heating solder paste in a reflow oven, allowing electronic components and PCBs to be interconnected. In this process, nitrogen gas (N₂) is used to create an inert atmosphere to prevent oxidation during heating. However, at PT XYZ, the control of nitrogen gas is still performed manually, and the gas flow is often left active even when not in use. This condition leads to gas waste and increased operational costs. This study aims to design an automatic control system for nitrogen gas flow based on wireless communication. The system consists of a Master module equipped with a photoelectric sensor to detect PCBs and a Slave module equipped with a solenoid valve to regulate nitrogen gas flow. Communication between modules is established using Bluetooth. The experimental results show a reduction in daily nitrogen gas consumption by 62.98% compared to the manual system. Data communication between modules remained stable at a distance of 12 meters, meeting the system’s requirements, with an average transmission time of 83.48 milliseconds and signal strength (RSSI) of -77.95 dBm (Master) and -78.55 dBm (Slave). The millis() based timer achieved 99.9% accuracy in time measurement over a 5 minute interval. Furthermore, the photoelectric sensor successfully detected PCBs up to a distance of 29 cm, exceeding the system’s required detection distance of 14 cm. Therefore, the proposed system has proven effective in improving nitrogen gas usage efficiency at PT XYZ.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Deo Malwa Yudistira
AU  - Sumantri Kurniawan Risandriya
AU  - Nanta Fakih Prebianto
PY  - 2025
DA  - 2025/12/29
TI  - Development of a Bluetooth Based Automatic Nitrogen Valve Control System for Enhancing Nitrogen Efficiency in SMT Reflow Oven Processes: A Case Study at PT XYZ
BT  - Proceedings of the  8th International Conference on Applied Engineering (ICAE 2025)
PB  - Atlantis Press
SP  - 554
EP  - 581
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-982-7_34
DO  - 10.2991/978-94-6463-982-7_34
ID  - Yudistira2025
ER  -