PPPD连接脚本失败

Question

我正在使用Raspberry Pi 4，并试图使用A9G的GSM/GPRS+GPS模块接入互联网。

首先，我用sudo apt-get install ppp screen elinks安装了ppp

我在路径/etc/ppp/peers/rnet中创建了一个名为rnet的文件

# My APN internet.vodafone.gr
connect "/usr/sbin/chat -v -f /etc/chatscripts/gprs -T internet.vodafone.gr"

# Communication port:
/dev/ttyS0

# Baudrate
9600

# Assumes that your IP address is allocated dynamically by the ISP.
noipdefault

# Try to get the name server addresses from the ISP.
usepeerdns

# Use this connection as the default route to the internet.
defaultroute

# Makes PPPD "dial again" when the connection is lost.
persist

# Do not ask the remote to authenticate.
noauth

# No hardware flow control on the serial link with GSM Modem
nocrtscts

# No modem control lines with GSM Modem
local

路径"MY_4_DIGIT_PIN"中的

1. 在文件gprs中添加了需要我的gprs的行

ABORT           BUSY
ABORT           VOICE
ABORT           "NO CARRIER"
ABORT           "NO DIALTONE"
ABORT           "NO DIAL TONE"
ABORT           "NO ANSWER"
ABORT           "DELAYED"
ABORT           "ERROR"

# cease if the modem is not attached to the network yet
ABORT           "+CGATT: 0"

""              AT
TIMEOUT         12
OK              ATH
OK              ATE1

# +CPIN provides the SIM card PIN
OK              AT+CPIN="MY_4_DIGIT_PIN"

# +CFUN may allow to configure the handset to limit operations to
# GPRS/EDGE/UMTS/etc to save power, but the arguments are not standard
# except for 1 which means "full functionality".
#OK             AT+CFUN=1

OK              AT+CGDCONT=1,"IP","\T","",0,0
OK              ATD*99#
TIMEOUT         22
CONNECT         ""

因此，当我试图启动rnet文件时：

sudo pon rnet

我在syslog (cat /var/log/syslog | grep pppd)中得到了以下错误消息：

Oct 14 18:14:22 raspberrypi pppd[3063]: pppd 2.4.7 started by pi, uid 0
Oct 14 18:14:35 raspberrypi pppd[3063]: Connect script failed
Oct 14 18:15:06 raspberrypi pppd[3063]: Connect script failed
Oct 14 18:15:37 raspberrypi pppd[3063]: Connect script failed
...

当我试图运行以下AT命令时，该模块似乎工作正常，并且能够连接到网络：

AT
OK

AT+CPIN?
+CPIN:READY
OK

AT+CREG?
+CREG: 1,1

OK
AT+CGATT?
+CGATT:1
OK

AT+COPS?
+COPS: 0,2,"20205"

AT+CGACT?
+CGACT: 1, 1

AT+HTTPGET="http://www.example.com/"
OK
HTTP/1.1 200 OK
...

因此，我无法理解我是否在文件rnet中写错了什么，或者是我做得不对。如果你有什么想法，请帮帮我。

Answer 1

问题是我的A9G模块没有足够的电源。因此，在启动进程之前，请检查您的A9G模块是否打开，并确保您已经禁用了登录shell，以便通过串行访问，并且启用了串行接口。