Configure reporting for Data Type: Single Precision Floating Point (0x39)

[kkossev]

I was working today on a HE driver for a device that requires reporting configuration of the Analog Input (Basic) (0x000c) cluster.
SmartThings old Groovy code is :
zigbee.configureReporting(ANALOG_INPUT_BASIC_CLUSTER, ANALOG_INPUT_BASIC_PRESENT_VALUE_ATTRIBUTE, DataType.FLOAT4, 0, 600, 1)

Connecting the same device to ST hub using an LUA driver shows this command:

(I don't have the LUA code, so it I am not sure how the threshold floating value 0.01 is actually coded)

The problem is that trying to code the same reporting configuration in HE results in a weird presentation of the floating point value

Seems like a bug in HE zigbee.configureReporting for DataType.FLOAT4 (0x29) type ...
I have patched this with a hardcoded "he cr 0x${device.deviceNetworkId} 0x01 0x000c 0x0055 0x39 0x0000 0x0258 {0ad7233c}"

EDIT: found this site : Floating Point to Hex Converter which helps to understand the float to hex conversion.

@mike.maxwell can you advise, please?

[mike.maxwell]

I'll have a look, thanks for the detail!

[kkossev]

Probably we just need to better document this rarely used DataType.FLOAT4 (0x39) data format.
This is another ST Groovy code ported to Hubitat which works as expected:

def setPeopleCounter(peoplecounter) {
	int pc =  Float.floatToIntBits(peoplecounter);
	return zigbee.writeAttribute(ANALOG_INPUT_BASIC_CLUSTER, ANALOG_INPUT_BASIC_PRESENT_VALUE_ATTRIBUTE, DataType.FLOAT4, pc, [:], 250)
}

Float floatToIntBits() method in Java with examples - GeeksforGeeks

[mike.maxwell]

I just need to fix the conversion for these float datatypes, it obviously ain't right.
Fixing that will however break that last example you sent...

[kkossev]

Yes, I thought, that such a change would not be backward compatible with the existing code.
So maybe leaving it as it is now would be a better approach.... a bug that has turned into a feature already.

I have found at least one other community driver in HE which uses the same Float.floatToIntBits conversion.