注意,其中的/dev/ttyACM0 是串口设备,后面描述。/etc/ppp/chat-wcdma#!/bin/sh## This is part 2 of the ppp-on script. It will perform the connection# protocol for the desired connection.#exec /usr/sbin/chat -v \ECHO ON \ABORT 'BUSY' \ABORT 'NO ANSWER' \ABORT 'ERROR' \TIMEOUT 20 \'' 'AT' \...【阅读全文】