The module Novatel EU850D freezes
Question
The module Novatel EU850D freezes after a while. What is the problem?
Solution
The module EU850D will freeze if too many AT-Commands is sent to the module in a short time. The most common thing when this happens is if a script tries to make a ppp connection, even though the module doesn't have any signal to the network. A way to avoid this is to use the command AT+CGREG to check if the module have a signal from the network every 15 seconds. When the module have service, the ppp script can be runned.