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