Equipped with a hidden video camera, the vest has sensors that transmit live streaming videos when the dog barks, showing what the dog sees via a mobile phone and computer application.
There are stray dogs on the streets of most Thai cities and the developer thought smart vests could help both the dogs and the community.
"It will make people feel that stray dogs can become night-watches for the communities," said Pakornkrit Khantaprap, 28, who is on the creative team that came up with the idea at the Cheil advertising agency, a subsidiary of South Korea's Samsung Electronics.
Martin Turner, managing director of the Phuket-based Soi Dog Foundation, which was formed over a decade ago to save stray dogs and cats across Thailand, welcomed the initiative.
Turner says there are many cases of cruelty against animals in Thailand, despite the introduction of the country's first Animal Welfare Law in late 2014, which penalizes wrongdoers with a maximum two years' imprisonment and a 40,000 baht ($1,205) fine.
The developer says a lot more tests are needed before the vest can be introduced into communities for trial runs.
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