Jamming

[awneil]

@szalik

… the modem gets stuck searching for network.

Please explain more clearly; eg,

• what, exactly, do you mean by “stuck” ?

• Where, exactly, does it get “stuck”?

Has anyone noticed done any tests in this area?

Not with jamming, but I have seen SiWi devices get “stuck” in the WIND: 7 and/or CREG: 0/2 state after losing registration due to poor signal - even when a good signal returns.

AT+COPS=0 was needed to force the module to re-scan for available networks.

Undocumented side-effect of AT+COPS=0

There is nothing in the documentation to indicate that issuing AT+COPS=0 will, “reset the PLMN search” - but this does, in fact, seem to be the case! For example: In such a case, it does seem that issuing AT+COPS=0 will, indeed, “reset the PLMN search” - and will allow the module to escape from the “stuck” state! Can anyone else corroborate this? Are there any other undocumented side-effects?