Is there a range limit for node-red-contrib-i2c 'i2c out' node?

[Nodi.Rubrum]

Is there a range limit for node-red-contrib-i2c 'i2c out' node payload value? Looking at the NR module node code I don't any defined limit for a single byte value to be defined as signed? It should be unsigned 0-255. for example, using a tsl2591 sensor, to fully power up the sensor, you have to send a byte value of 147. However, this generates the following error:

"RangeError: The value of "value" is out of range. It must be >= -128 and <= 127. Received 147"

This appears to be a limitation from the underlying node module 'i2c-bus' right?

[Colin]

I don't know the answer to the question but if you need a workaround you can use
msg.payload = msg.payload > 127 ? msg.payload - 256 : msg.payload

[rei_vilo]

Some time ago, I opened an issue Signed integer only as payload for I²C out node? #26 at the GitHub repository and suggested the same temporary workaround.

As of today, the issue remains unanswered.

It seems that Dceejay is the new maintainer of the node.

[Nodi.Rubrum]

Thanks for the work around. Will try it of course. I contacted the code maintainer of i2c-bus library and he believes this is within the NR node, not the base library, and I walked most of the code of the i2c-bus base library, and did not find any comparable limit either.

[dceejay]

Currently on vacation, but Pull requests can still be submitted