Hallo, i want ask something. how to read temperature from thermocouple 4-20mA? i use modbus rtu protocol to this. output value from sensor in node red like the picture in bellow. how to fix it? thanks before guys [image]

Depends on which ADC (Analogue Digital Converter) card / method you are using to read the values. MCP3008, others. Are there direct Node-RED nodes. I use WidgetLords cards and have been very pleased (no affiliation) with direct support for Raspberry Pi and Node-RED. They have multiple 4-20 ma ca…

ukmoose 30 October 2019 08:18 2

Perhaps @Riky_maarif can help you as you both appear to be doing the same exercise with the same value How to read Value Sensor from Modbus RTU

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How to read temperature using thermocouple

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