i use lm35 temperature sensor and stm32 f030k6 for reading sensor output when i call sim800 , lm35 output is noisy and incorrect value and When I open the antenna, the noise disappears. How can I remove this noise? thanks
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Welcome to stackoverflow. You can help other users to answer your question with a code example showing how to reproduce the issue you are experiencing. Further info about how to ask: https://stackoverflow.com/help/how-to-ask – Philipp Gfeller Mar 02 '19 at 07:09
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Sounds like you may need some filtering, can you share a schematic? – Colin Mar 04 '19 at 09:14