project/cfg/BoardConfig_IPC/overlay : Add SIM7600G overlay files

Signed-off-by: luckfox-eng29 <eng29@luckfox.com>

project/cfg/BoardConfig_IPC/overlay/overlay-luckfox-ppp/etc/ppp/peers/simcom-connect-chat

@@ -0,0 +1,13 @@
+ABORT "BUSY"
+ABORT "NO CARRIER"
+ABORT "NO DIALTONE"
+ABORT "ERROR"
+ABORT "NO ANSWER"
+TIMEOUT 30
+"" AT
+OK ATE0
+OK ATI;+CSUB;+CSQ;+CPIN?;+COPS?;+CGREG?;&D2
+# Insert the APN provided by your network operator, default apn is 3gnet
+OK AT+CGDCONT=1,"IP","ctnet",,0,0
+OK ATD*99#
+CONNECT

project/cfg/BoardConfig_IPC/overlay/overlay-luckfox-ppp/etc/ppp/peers/simcom-disconnect-chat

@@ -0,0 +1,8 @@
+ABORT "ERROR"
+ABORT "NO DIALTONE"
+SAY "\nSending break to the modem\n"
+"" +++
+"" +++
+"" +++
+SAY "\nGoodbay\n"
+

project/cfg/BoardConfig_IPC/overlay/overlay-luckfox-ppp/etc/ppp/peers/simcom-pppd

@@ -0,0 +1,35 @@
+/dev/ttyUSB2 115200
+user "test" password "test"
+# The chat script, customize your APN in this file
+connect 'chat -s -v -f /etc/ppp/peers/simcom-connect-chat'
+# The close script
+disconnect 'chat -s -v -f /etc/ppp/peers/simcom-disconnect-chat'
+# Hide password in debug messages
+hide-password
+# The phone is not required to authenticate
+noauth
+# Debug info from pppd
+debug
+# If you want to use the HSDPA link as your gateway
+defaultroute
+# pppd must not propose any IP address to the peer
+noipdefault
+# No ppp compression
+novj
+novjccomp
+noccp
+ipcp-accept-local
+ipcp-accept-remote
+local
+# For sanity, keep a lock on the serial line
+lock
+modem
+dump
+nodetach
+# Hardware flow control
+nocrtscts
+remotename 3gppp
+ipparam 3gppp
+ipcp-max-failure 30
+# Ask the peer for up to 2 DNS server addresses
+usepeerdns