Yes–I have saved it on my lab computer, so I was looking at it down there earlier today. That signal is I showed in the screen shot I posted, was coming off the RST pin as it turns out–because that’s the pin that was labeled “TX” in the old diagram. I should have figured that out before he corrected the pin diagram, but there were a number of things going on so I couldn’t quite converge on the problem.
I’ll stand by to hear what @ansonhe97 can find out about the Serial2 pin issue. I suspect there is something missing from the Seeed library that got downloaded in the Arduino IDE, because the ARM compiler being invoked certainly doesn’t know anything about the Serial2 object, as my grep output indicated.
Thanks for working on this.
TB