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SIM800L is not working after disconnecting with PC

Arduino

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rafitc99 @salmanfaris last edited by

@salmanfaris When connecting with PC. It will work well.
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salmanfaris @rafitc99 last edited by

@rafitc99 when powering with the LM2596 it's not sending message text right? but sending blank SMS right?
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rafitc99 @salmanfaris last edited by

@salmanfaris Yes.
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salmanfaris last edited by

Ok, then you need to check the LM2596 output current and voltage!
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rafitc99 last edited by

Thank-you @salmanfaris
It's solved.
Actually, It was my mistake. I didn't add a proper reset for MCU.
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@codelery Awesome. That's great news. Kudos to @rafitc99 .

@codelery Please keep us updated about your project, looking forward to seeing it in action 🤩

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@rafitc99 I changed the buffer and that solved the problem. Thanks a lot for coming to my rescue.

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@salmanfaris I did change the buffer size and everything is working perfectly. Thanks coming to my rescue.

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@codelery said in Help needed: Arduino Wireless Notice Board project:

I am using the hardware serial (pin 0 and 1 on Arduino Uno)

As @rafitc99 mentioned, you need to expand the Serila buffer, in the hardware serial also the Arduino board package implements a 64-byte ring buffer for send and receive on the hardware serial messages. So you need to change that to 256 as per your message length.

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@rafitc99 The thing is that I am not using the SoftwareSerial library in receiving the message from the first microcontroller. I am using the hardware serial (pin 0 and 1 on Arduino Uno)

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