Unverified50% confidenceSolutionExact time
使用树莓派加DS18B20温度传感器和简单Web服务可实现冰箱温度自动记录并生成PDF，整套硬件成本约50-80欧元且无持续订阅费用
1
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50%
Confidence
Medium-term (~90 days)
Relevance
8/26/2026
First Seen
Valid until: 11/24/2026
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