I am a college student living in south Korea. So, please forgive me for using a translator. no different
I succeeded in outputting the bpm value using Arduino, infrared sensor, and Bluetooth module. I want to automatically save this value in a list and put it in the calculation formula to obtain kcal one by one. Is it possible?
I succeeded in outputting the bpm value using Arduino, infrared sensor, and Bluetooth module. I want to automatically save this value in a list and put it in the calculation formula to obtain kcal one by one. Is it possible?
I merged your topics. No need to double post. Maybe you can start by showing your relevant blocks.
Also show us how to get kcal from bpm?
Would you like to check my code blocks and what they participate in just once?
The bpm is being printed from the Arduino and being sent to App Inventor using the Bluetooth module and I can see it. I'd like to show you a picture, but I don't have any data right now.
Using the block code you see now, I want to output the daily predicted calories per minute and calories per minute on the app and the LCD, but I don't know how to add the calories to get the daily calories. How can I make it work the way I want?
I merged your other thread... please use this thread and do not start a new one for the same topic
Taifun
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(Canned Reply: ABG- Export & Upload .aia)
Export your .aia file and upload it here.
Also, we can't translate components to English, making it hard to understand data.
Be sure to use println() at the end of each message to send from the sending device, to signal end of message.
Only use print() in the middle of a message.
Be sure not to println() in the middle of a message, or you will break it into two short messages and mess up the item count after you split the message in AI2.
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.
Some people send temperature and humidity in separate messages with distinctive prefixes like "t:" (for temperature) and "h:" (for humidity).
(That's YAML format.)
The AI2 Charts component can recognize these and graph them. See Bluetooth Client Polling Rate - #12 by ABG
To receive YAML format messages, test if the incoming message contains ':' . If true, split it at ':' into a list variable, and find the prefix in item 1 and the value in item 2.