Signed integer only as payload for I²C out node?

[rei-vilo]

I'm using the I²C out node against a PCF8591.

• Address 64
• Command 40 for DAC output
• Sent bytes 1
• Values 0 and 127 are accepted,

But value 254 is refused with the following error message:

"RangeError [ERR_OUT_OF_RANGE]: The value of "value" is out of range. It must be >= -128 and <= 127. Received 254"

Are signed integers allowed only for the I²C out node?

How to send plain an unsigned integer?

Thank you for your help!

Releases

• I²C node 0.5.5
• Node-RED 1.0.3

[rei-vilo]

As a temporary workaround, I can add an in-between function before the I²C out node.

if (msg.payload > 127) 
{
    msg.payload = msg.payload - 256;
}
return msg;

The implementation of the I²C out node is not consistent with the I²C in node, which outputs unsigned integers 0..255 .

[Nodi-Rubrum]

Is there any expectation of this being fixed? Anytime soon? True there is a work-around, but it should be fixed no?