I have a Huawei E3372 usb-modem with a hologram SIM card, running on a raspberry pi 4.
I get an internet connection through the SIM card and everything works fine.
I have an issue with inbound connections, either through SpaceBridge or the Messaging API in the hologram dashboard.
When I try to use the Spacebridge (after enabling tunneling and setting up the connection), I get stuck in an empty “waiting for connection” shell, followed by a timeout after a few minutes.
I then tried to use the Messaging API from the hologram dashboard, with no success as well;
I started a listener on the raspberry pi, and sent a message through the dashboard, only to get an error message: “Failed to connect to device to send message”
This leaves me very confused, as it seems like I have two-way connections through the SIM card, but for some reason, neither ssh (through spacebridge) nor TCP traffic manages to go through.
Did anyone else encounter this issue before?
Could it just be my hardware?