Karunananttha Gunasegeran, Mohd Hakimi Bin Zohari. IOT Based Outdoor Manhole Detection and Monitoring System. peat [Internet]. 2025 Oct. 16 [cited 2026 Aug. 15];6(2):225-34. Available from: https://periodical.uthm.edu.my/index.php/peat/article/view/21062