RS485 Sensor

4 replies
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Hi, I am trying to connect one energy meter sensor which has RS485 output , But i am unable to read RS485 sensor readings in Nucleo F401RE, If you have any examples please help out!!

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Tesla DeLorean

Guru

Perhaps have the meter vendor explain how it works to you or suggest contractors you might work with.

RS485 is a signaling interface. It doesn't define how particular hardware is queried or used in the broader sense.

Does the meter have a manual or datasheet you can refer too?

Do you have the RS485 level/interface circuit wired to a UART? Does that work at some basic level?

Do you work with anyone who knows what they are doing or have experience with this equipment?

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M

MithunkumarAuthor

Associate

Thanks for your valuable time Delorean!!

Actually I had used ESP32 for RS485 Sensors, now I try to connect same RS485 Sensors in STM32 but I am not able to connect, I have tried with the same interface circuit which I used in ESP32, but I am not able to read.

Tesla DeLorean

Guru

Ok, so present this in a form that shows the code that works and the code that doesn't and diagram what exactly you have wired up to the STM32

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