Hi Guys, I am trying to use Spark.variable(“variable”, &variable, INT) with a uint8_t variable, but when I go to retrieve the variable it comes back with a crazy number… when it should be 80 { "cmd": "VarReturn", "name": "max_bright", "result": 285277985, "coreInfo": { "last_app": "", …

[image] Incorrect value read for Spark.Variable via API Troubleshooting Hi, I’m seeing an occasional incorrect spark.variable() value when reading via the api. This has happened on more than one device/app so it’s not something in my firmware. The variable appears to take…

You could try using a regular ‘int’ type instead of ‘uint8_t’ for the published variable.

I recently added a change that will be in 0.4.6 that will produce a compiler error when trying to register variables with the wrong type. :slight_smile:

Could we possible get more variable types? I know it works with int but I was trying to use uint8_t because I am only storing a value that is between 0 and 255, so saves on memory and EEPROM etc

You’ll save 3 bytes of RAM but probably cost you a lot more in increased flash use with the additional code, so I’d suggest sticking with a few key variable types. :smile:

Just to add to @mdma ’s answer. You won’t actually save any RAM by doing something like this uint8_t var1; uint8_t var2; uint8_t var3; compared to using int, since on a 32bit system all variables are (by default) placed on 4-byte boundaries. You can force them to be packed but this would call for…

uint8_t and Spark.variable

Firmware

BulldogLowell September 16, 2015, 11:08am 2

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uint8_t and Spark.variable

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