Nova R410 PPP Connection issues

We have been seeing some strange behavior with our Nova R410 (FW ver: L0.,A.02.04) when trying to get a PPP connection (hologram network connect) this morning (Eastern time). The modem consistently failed to get a PPP connection, with the error Modem hangup - possibly due to an unregistered SIM. This modem had been on the Hologram network in the past without issue.

We noticed Hologram was reporting SpaceBridge issues issues. Now that the issue is resolved, our modem is able to get a PPP connection. Can you confirm that troubles with SpaceBridge would likely result in trouble with a modem setting up a PPP connection? One interesting data point, during the SpaceBridge troubles, we had several 3G Novas (Sara-U201) with no trouble getting/keeping PPP connections.

Related to this PPP issue, when the hologram network connect command failed to connect the device (/dev/ttyUSB1) went away every time. Once the network connect failed, we could no longer do anything with the modem. Is there a way to prevent /dev/ttyUSB1 from going away if the network connect command fails?



The SpaceBridge connection may have been incorrect, as I’m seeing the issue again with my R410s not being able to start a PPP connection.

I’ve also confirmed that unplugging/replugging in the R410 after it does away makes it show up again.

Hi yeah, spacebridge issue would be unrelated.

Kind of sounds like you might be running into a power issue maybe causing the modem to brown out. The serial port shouldn’t normally disappear when ppp fails although it might get tied up for a minute until some processes timeout.

What kind of Raspberry Pi are you using and how are you powering it?

One other thing to check since I see you’re on the new firmware: could be the issue described in the troubleshooting section in the guide here:

We’re using a Raspberry Pi 3b+ with several different 3A-6A power supplies. I’ll try the troubleshooting steps for the new firmware.

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.