ALSO NEW ISSUE -- Nova u201 with Raspberry Pi unable to detect usable serial port


#1

I have Nova u201 that I have been using for sometime, but now I get an error trying to use the hologram command with the modem:

sudo hologram modem connect -vv
DEBUG: checking for vid_pid: (‘12d1’, ‘1506’)
DEBUG: checking for vid_pid: (‘05c6’, ‘90b2’)
DEBUG: checking for vid_pid: (‘12d1’, ‘1001’)
DEBUG: checking for vid_pid: (‘1546’, ‘1102’)
INFO: Detected modem Nova_U201
DEBUG: checking port /dev/ttyACM0
DEBUG: checking port /dev/ttyACM5
DEBUG: checking port /dev/ttyACM6
DEBUG: checking port /dev/ttyACM1
DEBUG: checking port /dev/ttyACM2
DEBUG: checking port /dev/ttyACM3
DEBUG: checking port /dev/ttyACM4
ERROR: Unable to detect a usable serial port

uname -a
Linux gremlin 4.14.79-v7+ #1159 SMP Sun Nov 4 17:50:20 GMT 2018 armv7l GNU/Linux

hologram version
0.7.2

I have been running a python script to receive texts and place them onto an MQTT message buss when I noticed tonight that I was not getting messages on the MQTT topic – that’s when I discovered this issue.

Any thoughts??


#2

Well, found the issue, the AD2USB package installs a 2.x version of PySerial rather than the 3.x version – reinstalling the ver 3 package fixed the problem.