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I am using a sim800H module to connect to GSM network. To address the module I am using AT commands through a USART connection from stm32f1. however, the problem is that the status goes down short time after I start interfacing it. What should be the possible reasons

  • are there any messages from the sim800H module on the serial connection? – jsotola Jan 9 at 2:08
  • No it actually works well for sometime where we get all the expected responses on the serial connection then suddenly it goes down. There is a state pin that we're monitoring that takes 1 when it works fine and 0 zero when it's not. – Abyr Jan 9 at 8:43

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