Activity › Forums › Questions & Troubleshooting › Hardware › Trouble connecting SIM800L to controllino MAXI › Reply To: Trouble connecting SIM800L to controllino MAXI

  • Lukas

    Member
    February 23, 2021 at 10:25 am

    Hi W. Mets,

    I am wondering how you have used the pins 2 and 3 for the UART at MINI? Are you using SoftwareSerial library? I assume that you connected the shield to the X1 pinheader, right?

    Next point is the MAXI – here you should use pins 18 and 19, but the communication must be done through Serial1 .

    Thanks,

    Lukas

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