Insert a float value in modbus contrib flex-servers buffer problems

Industrial
1

Hi.
I have some issues I don't understand with inserting float data in to the modbus flex-servers buffer and read that data with a modbus flex-getter when that data is in little endian.

First an example that I'm able to understand/work. Big endian.
Function node preparing the insert to flex-server:

const airTemp = 5.0
const airTempBuffer = Buffer.alloc(4)
airTempBuffer.writeFloatBE(airTemp, 0)

msg.payload  = {
    'value': airTempBuffer,
    'register': 'holding',
    'address': 5000,
    'disableMsgOutput': 1
}

return msg;

And in the body of the GetHolding in the flex-server you return this:

return node.registers.readUInt16BE(addr * node.bufferFactor)

Then the request preparation:

const request = {
    "fc": 3,
    "unitid": 1,
    "address": 5000,
    "quantity": 2
}
msg.payload = request
return msg;

The response payload:

{"data":[16544,0],"buffer":[64,160,0,0]}

With this I can interpret the data:

msg.payload.buffer.readFloatBE().toFixed(1)

This gives me "5.0"
Nice!

But if I do this:

airTempBuffer.writeFloatLE(airTemp, 0)

The response payload is this:

{"data":[0,0],"buffer":[0,0,0,0]}

Why does little-endian give: {"data":[0,0],"buffer":[0,0,0,0]}
Expected behavior in my mind would be something like this: {"data":[0,16544],"buffer":[0,0,64,160]}

Best regards
Steffen