Hii,
The data coming from the serial monitor has ? error coming in between the msg.payload:string
I have no idea how to avoid those.
Hii,
The data coming from the serial monitor has ? error coming in between the msg.payload:string
I have no idea how to avoid those.
What value (s) are you expecting?
Is this a specific protocol?
What is on the other end of the serial port?
Hi,
Actually a sensor value from the Arduino via Serial in node with delay of 1000ms.
Did you write the code in the Arduino?
Show us what it sends.
I wanted these auto log in csv file. with timestamp and these sensor values.
But the thing is these data(s) are in string which I want it to be in numbers. Hence yet I haven't come up with any solution yet.
Did you?
If you had answered the above, I would suggest you send JSON data as it can be converted into actual meaningful values.
e.g. if you send
{
"deviceId": "44:3f:25:a1:4e:3e",
"dataId": "temperature"
"value": 23.6
}
You can simply send this through a JSON node and get actual object with correct numbers and strings all automagically parsed out for you. And it is extensible so if you add "UoM" af a future point, nothing breaks.
{
"deviceId": "44:3f:25:a1:4e:3e",
"dataId": "temperature"
"value": 23.6,
"UoM": "°C"
}
Dear Concern,
I have just read data from AnalogPin. Same I have fetched via serial in.
ok, that doesnt mean you cannot transmit valid JSON from aurduino to make the Node-RED side cleaner and easier to consume and auto parse/convert numbers and strings back into the intended format/types.
Also, if you "just read data from AnalogPin" and send that, then your issue is in the arduino program - it is possible you need to do something different to the data to generate correct transmission format.
Thanks for the insight!! I will try with ArduinoJson
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