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Daniel Barlow 2024-05-14 22:27:37 +01:00 committed by Raito Bezarius
parent fa7fde87db
commit c3d6c55a74
1 changed files with 15 additions and 10 deletions
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25
modules/cdc-ncm/default.nix
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@ -15,16 +15,29 @@ in {
services.wwan = let services.wwan = let
chat = lib.escapeShellArgs [ chat = lib.escapeShellArgs [
# Your usb modem thing might present as a tty that you run PPP
# over, or as a network device ("ndis" or "ncm"). The latter
# kind is to be preferred, at least in principle, because it's
# faster. This initialization sequence works for the Huawei
# E3372, and took much swearing: the error messages are *awful*
"" "AT" "" "AT"
"OK" "ATZ" "OK" "ATZ"
# create PDP context
"OK" "AT+CGDCONT=1,\"IP\",\"data.uk\"" "OK" "AT+CGDCONT=1,\"IP\",\"data.uk\""
# activate PDP context
"OK" "AT+CGACT=1,1" "OK" "AT+CGACT=1,1"
# caret is special to chat, so needs escaping in AT commands # setup username and password per requirements of sim provider.
# (caret is special to chat, so needs escaping in AT commands)
"OK" "AT\\^AUTHDATA=1,2,\"1p\",\"one2one\",\"user\"" "OK" "AT\\^AUTHDATA=1,2,\"1p\",\"one2one\",\"user\""
"OK" "AT\\^NDISDUP=1,1" # ,\"data.uk\",\"user\",\"one2one\",2" # start the thing (I am choosing to read this as "NDIS DialUP")
"OK" "AT\\^NDISDUP=1,1"
]; ];
modemConfig = oneshot { modemConfig = oneshot {
name = "modem-configure"; name = "modem-configure";
# this is currently only going to work if there is one
# modem only plugged in, it is plugged in already at boot,
# and nothing else is providing a USB tty.
# https://stackoverflow.com/questions/5477882/how-to-i-detect-whether-a-tty-belonging-to-a-gsm-3g-modem-is-a-data-or-control-p
up = '' up = ''
sleep 2 sleep 2
${pkgs.usb-modeswitch}/bin/usb_modeswitch -v 12d1 -p 14fe --huawei-new-mode ${pkgs.usb-modeswitch}/bin/usb_modeswitch -v 12d1 -p 14fe --huawei-new-mode
@ -38,14 +51,6 @@ in {
dependencies = [ modemConfig ]; dependencies = [ modemConfig ];
}; };
# an ncm ethernet adaptor does
# * usb modeswitch
# * AT commands
# and then behaves like a link.
# we could identify by vid:pid but that's a bit awkward
# if there's more than one present. IMEI?
# https://stackoverflow.com/questions/5477882/how-to-i-detect-whether-a-tty-belonging-to-a-gsm-3g-modem-is-a-data-or-control-p
}; };
} }