So i have this app that reads and send data from and to an arduino UNO via bluetooth and it controls a relay module. I have a list that reads from the bt serial that the arduino sends and each item is seperated by a semi-colon. The problem is that now that i'm trying to read two reading from the DHT11 sensor it always adds zero's and says i'm trying to get more items than the list can hold.
here is the error:
Arduino code:
i tried checking the serial display in the arduino ide software and it has no errors and displays the temperature normally, so the sensor is fine, there is something that i did wrong in either the data sending or the list but i can't figure it out
By the way i tried with Bluetooth component but not not wrking on latest mobile models
Please see the Delimiter article in FAQ
Be sure to use println() at the end of each message to send from the sending device, to signal end of message. Do not rely on timing for this, which is unreliable.
In the AI2 Designer, set the Delimiter attribute of the BlueTooth Client component to 10 to recognize the End of Line character.
Also, return data is not immediately available after sending a request,
you have to start a Clock Timer repeating and watch for its arrival in the Clock Timer event. The repeat rate of the Clock Timer should be faster than the transmission rate in the sending device, to not flood the AI2 buffers.
In your Clock Timer, you should check
Is the BlueTooth Client still Connected?
Is Bytes Available > 0?
IF Bytes Available > 0 THEN
set message var to BT.ReceiveText(-1)
This takes advantage of a special case in the ReceiveText block:
ReceiveText(numberOfBytes)
Receive text from the connected Bluetooth device. If numberOfBytes is less than 0, read until a delimiter byte value is received.
If you are sending multiple data values per message separated by | or comma, have your message split into a local or global variable for inspection before trying to select list items from it. Test if (length of list(split list result) >= expected list length) before doing any select list item operations, to avoid taking a long walk on a short pier. This bulletproofing is necessary in case your sending device sneaks in some commentary messages with the data values.
Not too sure but the word "void" might be your issue
Thank you very much for your detailed response I will try your suggestions and hopefully, they work