Philipp Michalski phalski

## at-command-notes.md

      
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              June 30, 2024 13:46
            
              
                Personal notes to Hayes/AT command interface understanding
              
          
    Hayes/AT command interface understanding

This document describes my personal notes of understanding and implementing AT command transmission to a modem via serial line.
References


HUAWEI ME909s Series LTE Module V100R001 AT Command Interface Specification
http://consumer.huawei.com/en/solutions/m2m-solutions/products/support/user-guides/detail/me909s_120_en.htm?id=50243

Hardware


## openwrt-15.05.1-huawei-e3372-install.sh
opkg update
opkg install comgt kmod-usb-serial kmod-usb-serial-option kmod-usb-serial-wwan kmod-usb-net-cdc-ether kmod-usb-net-huawei-cdc-ncm usb-modeswitch

## tlmr3020-usb-e3372-build.sh
# OpenWRT image builder command to create custom minimal image for TL-MR3020 router.
# This image only contains packages for usb/ext4 storage support and drivers for Huawei E3372 Modem.
# No luci web ui included due to limited flash storage on device.
# Used to build OpenWRT 15.05 image
make image PROFILE=TLMR3020 PACKAGES="block-mount kmod-fs-ext4 kmod-usb-storage comgt kmod-usb-serial kmod-usb-serial-option kmod-usb-serial-wwan kmod-usb-net-cdc-ether kmod-usb-net-huawei-cdc-ncm usb-modeswitch"
	opkg update
	opkg install comgt kmod-usb-serial kmod-usb-serial-option kmod-usb-serial-wwan kmod-usb-net-cdc-ether kmod-usb-net-huawei-cdc-ncm usb-modeswitch
	# OpenWRT image builder command to create custom minimal image for TL-MR3020 router.
	# This image only contains packages for usb/ext4 storage support and drivers for Huawei E3372 Modem.
	# No luci web ui included due to limited flash storage on device.
	# Used to build OpenWRT 15.05 image
	make image PROFILE=TLMR3020 PACKAGES="block-mount kmod-fs-ext4 kmod-usb-storage comgt kmod-usb-serial kmod-usb-serial-option kmod-usb-serial-wwan kmod-usb-net-cdc-ether kmod-usb-net-huawei-cdc-ncm usb-modeswitch"