Orange Pi 2G-IOT User Manual
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www.orangepi.org
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After input the command, you will enter the configure interface, select
"
Serial port
setup
"
Push A to modify Serial Device into
/dev/modem0
Use AT command to send message
First you need to input AT command to check the situation of Modem, if Modem replies
OK, then means Modem is connect correctly.