No appropriate method, property, or field 'analogRead' for class 'arduino'.

I connect my arduion to matlab and everything is fine but when I tried to read the values that is come from LM32 sensor which I connect to port A0 by using analogRead(a,0) I get this error No appropriate method, property, or field 'analogRead' for class 'arduino'. **I am using matlab 2015 a

Answer 1

[Walter Roberson]

analogRead() needs to be done in the code on the arduino side, not on the MATLAB side. See some sample code

[Mohammed Al-Mostafa]

I am making GUI ; on youtubes I saw that's they use analogRead() on the matlab side is that wrong also ??

[Walter Roberson]

Yes, it is incorrect. There is a Simulink Block for Arduino named "Analog Read", but analogRead() as a call needs to be on the Arduino side.

What you might want is readVoltage(); see http://www.mathworks.com/help/supportpkg/arduinoio/read-and-write-data.html

[Mohammed Al-Mostafa]

I tried readVoltage it is give me wrong reading very small numbers about 0.5 also I tried the block it is also gives me zero reading any suggestion ?

[Walter Roberson]

The LM32 does not output analog signals. The LM32 outputs digital signals on its SWD pin. The Master (arduino in this case) must signal the LM32 that it wants to read, and there is a protocol. See http://pdf.datasheetcatalog.com/datasheet2/a/0s6d7g5uzse6i36klqax64y9lcpy.pdf

I would suggest that what you were looking at was instructions for an LM35 sensor, as LM35 sensors encode their readings as voltage outputs.

There is a possibility that one of these will be of assistance to you:

• http://www.hacktronics.com/Tutorials/arduino-1-wire-tutorial.html
• http://playground.arduino.cc/Learning/OneWire

Before I do any more research, please confirm that you are using an LM32 Temperature Sensor, from National Semiconductor. There are a number of different temperature sensors from different manufacturers and will similar names, but which have quite different interfaces.

[Walter Roberson]

It turns out that analogRead() did exist, but it was for the Legacy arduino package. https://www.mathworks.com/matlabcentral/fileexchange/32374-legacy-matlab-and-simulink-support-for-arduino

Answer 2

[Manohar Patel]

Hii @Mohammed Al-Mostafa your error is "No appropriate method, property, or field 'analogRead' for class 'arduino'". please 'analogRead' swap with 'readVoltage'. because some attributes are change in matlab2015.