ASR1602是新一代单模Cat.1 bis芯片，具有高集成度、低功耗、低成本的特点，尺寸小，仅为6.2mm x 6.6mm。
基于Cortex-R5处理器主频达到624MHz (ASR1602 614MHz)，ASR1602内置了4MB Flash + 4MB pSRAM或者2MB pSRAM，还可通过外接存储器进行扩容。
ASR1602支持512bit OTP密钥，支持Security BOOT/Strap/Bonding，提供了较高的安全系数。
ASR1602更侧重于经济型市场，支持openCPU方案，减少开发复杂度和成本。
当前最具性价比的通信模组：
中移 ML307A/R/C模组
usb设备信息
usb 1-13: new high-speed USB device number 9 using xhci_hcd
usb 1-13: New USB device found, idVendor=2ecc, idProduct=3004, bcdDevice= 0.00
usb 1-13: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-13: Product: Arom Usb Boot Port
usb 1-13: Manufacturer: ASR Microelectornics
usb 1-13: SerialNumber: arom0123456789
cdc_acm 1-13:1.0: ttyACM0: USB ACM device
usb 1-13: USB disconnect, device number 9
usb 1-13: new high-speed USB device number 10 using xhci_hcd
usb 1-13: New USB device found, idVendor=2ecc, idProduct=3012, bcdDevice= 1.00
usb 1-13: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-13: Product: ML307B
usb 1-13: Manufacturer: CMIOT
usb 1-13: SerialNumber: 200806006809080000
rndis_host 1-13:1.0 eth0: register 'rndis_host' at usb-0000:00:14.0-13, RNDIS device, ac:0c:29:a3:9b:6d
rndis_host 1-13:1.0 enxac0c29a39b6d: renamed from eth0
|__ Port 013: Dev 010, If 0, Class=Wireless, Driver=rndis_host, 480M
|__ Port 013: Dev 010, If 1, Class=CDC Data, Driver=rndis_host, 480M
|__ Port 013: Dev 010, If 2, Class=Vendor Specific Class, Driver=[none], 480M
|__ Port 013: Dev 010, If 3, Class=Vendor Specific Class, Driver=[none], 480M
|__ Port 013: Dev 010, If 4, Class=Vendor Specific Class, Driver=[none], 480M
主动加载option 串口驱动
modprobe option
echo 2ecc 3012 | sudo tee /sys/bus/usb-serial/drivers/option1/new_id
就会看到驱动加载
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial support registered for generic
usbcore: registered new interface driver option
usbserial: USB Serial support registered for GSM modem (1-port)
option 1-13:1.4: GSM modem (1-port) converter detected
usb 1-13: GSM modem (1-port) converter now attached to ttyUSB0
option 1-13:1.3: GSM modem (1-port) converter detected
usb 1-13: GSM modem (1-port) converter now attached to ttyUSB1
option 1-13:1.2: GSM modem (1-port) converter detected
usb 1-13: GSM modem (1-port) converter now attached to ttyUSB2
# lsusb -v -d 2ecc:3012
Bus 001 Device 010: ID 2ecc:3012 ASR Microelectronics ML307B
Negotiated speed: High Speed (480Mbps)
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 [unknown]
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x2ecc ASR Microelectronics
idProduct 0x3012 ML307B
bcdDevice 1.00
iManufacturer 1 CMIOT
iProduct 2 ML307B
iSerial 3 200806006809080000
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x00c4
bNumInterfaces 5
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 500mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 224 Wireless
bFunctionSubClass 1 Radio Frequency
bFunctionProtocol 3 RNDIS
iFunction 5 Mobile RNDIS Network Adapter
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 3 RNDIS
iInterface 5 Mobile RNDIS Network Adapter
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 01 00 01
** UNRECOGNIZED: 04 24 02 00
** UNRECOGNIZED: 05 24 06 00 01
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x87 EP 7 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 16
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 5 Mobile RNDIS Network Adapter
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x0c EP 12 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 8 Mobile Diag Interface
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x0b EP 11 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 11 Mobile AT Interface
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 01 00 00
** UNRECOGNIZED: 04 24 02 02
** UNRECOGNIZED: 05 24 06 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x89 EP 9 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 16
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x86 EP 6 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x0f EP 15 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 11 Mobile AT Interface
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 01 00 00
** UNRECOGNIZED: 04 24 02 02
** UNRECOGNIZED: 05 24 06 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x88 EP 8 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 16
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x0a EP 10 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 [unknown]
bDeviceSubClass 0 [unknown]
bDeviceProtocol 0
bMaxPacketSize0 16
bNumConfigurations 1
Device Status: 0x0001
Self Powered
改IMEI步骤：
0. 查看当前IMEI (此步骤用于记录修改前的IMEI)
AT+CGSN
1. 进入工厂模式
AT*PROD=1
2. 删除原来IMEI
AT*MRD_IMEI=D
3. 写入新的IMEI(以IMEI 012345678912345 为例子)
AT*MRD_IMEI=W,0,01JAN1970,012345678912345
4. 退出工厂模式
AT*PROD=0
5. 重启
AT+RESET
其他
写入mac AT*MRD_WIFIID=W,0,01JAN1970,写入sn AT*MRD_SN=W,0,01JAN1970, 切换卡1/卡2 AT+SWSIM=0 / AT+SWSIM=1
参考资料：
https://github.com/huwangkeji/Asr-Tools/blob/main/README.md
picocom -b 11520 -c /dev/ttyUSB2