While trying to reproduce your problem, I noticed the following (confusing) behavior:
- Teletype integration needs to be disabled and re-enabled in order for a newly selected slave address to take effect.
So if you recently changed the slave address (which should be 0xB0), it might still be using the old address until you reboot or disable+re-enable. I’ll fix this in the next release so that changing the slave address takes immediate effect.
Another possibility is that the port number on the unit and the port number you have specified in the SC.CV command are not matching?
I would double-check that the SCL and SDA wires are not swapped. I’ve done it a number of times myself.
Perhaps the change in voltage is too small to see in the ER-301 scope? Test with larger values.
SC.CV 1 V 5