Temperature, Humidity and Light sensor for under 7 USD with MQTT support

Temperature, Humidity and Light sensor for under 7 USD with MQTT support
How is this possible?!
-- More information below! --

More information:
https://diytechandrepairs.nu/universal-mqtt-wireless-sensor-based-on-esp-01/
Gear used:
ESP01 and programmer https://ebay.to/2IvlzFA
GY49 Light sensor module I2C https://ebay.to/336Z6Xi
SHT21 Temperature Sensor I2C https://ebay.to/2Opqc89
3.3VDC Step down module https://ebay.to/2LS1rQi
Flexible silicone wires https://ebay.to/2olbZOM

Ferrules and tools https://ebay.to/35h9w8C
Crimper and snipper tool https://ebay.to/35hCsNN
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Видео Temperature, Humidity and Light sensor for under 7 USD with MQTT support канала DIY Tech & Repairs