Is the Device ID hex? We are looking at having nearly 55 units in our network – if everything goes well. Do you for see us running out of Device IDs?
The Device ID defines the last byte of the Mac address. In OpenSprinkler options, it’s presented as an integer and you can set any number between 0 to 255. You are right that when displayed in Mac address it’s presented as a hex number. So you can define up to 256 unique IDs (which is sufficient for 55 units). This number can be increased further by changing the firmware slightly.