OpenEmbed EdgeBox-RPI4 User manual
EdgeBox-RPI4 User Manual
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Contents
1. Introduction....................................................................................................................................................................................... 4
1.1 Features...................................................................................................................................................................................4
1.2 Interfaces.................................................................................................................................................................................5
1.3 Block Diagram........................................................................................................................................................................7
2. Installation.........................................................................................................................................................................................8
2.1 Mounting.................................................................................................................................................................................8
2.2 Connectors and Interfaces.......................................................................................................................................................9
2.2.1 Power supply............................................................................................................................................................... 9
2.2.2 Serial Port (RS232 and RS485)...................................................................................................................................9
2.2.3 DI&DO...................................................................................................................................................................... 10
2.2.4 HDMI........................................................................................................................................................................ 11
2.2.5 Ethernet..................................................................................................................................................................... 11
2.2.6 USB HOST................................................................................................................................................................12
2.2.7 Console(USB typeC).................................................................................................................................................12
2.2.8 LED........................................................................................................................................................................... 12
2.2.9 SMA Connector
2.2.10 NANO SIM card slot...............................................................................................................................................14
2.2.11 Mini-PCIe................................................................................................................................................................ 15
2.2.12 M.2.......................................................................................................................................................................... 16
3. Drivers and Programming Interfaces.............................................................................................................................................. 17
3.1 LED.......................................................................................................................................................................................17
3.2 Serial Port (RS232 and RS485)............................................................................................................................................ 18
3.3 Cellular over Mini-PCIe....................................................................................................................................................... 18
3.4 WDT..................................................................................................................................................................................... 21
3.4.1 Block Diagram of WDT............................................................................................................................................ 21
3.4.2 How it works............................................................................................................................................................. 21
3.5 RTC.......................................................................................................................................................................................21
3.5.1.................................................................................................................................................................................... 21
3.5.2.................................................................................................................................................................................... 22
3.10 UPS for safe shut down...................................................................................................................................................... 22
4. Electrical specifications...................................................................................................................................................................24
4.1 Power consumption...............................................................................................................................................................24
4.2 UPS....................................................................................................................................................................................... 24
5. Mechanical Drawings......................................................................................................................................................................24
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1. Introduction
EdgeBox-RPI4 is a rugged fanless Edge Computing Controller with Raspberry Pi Computer Module 4(CM4)
for harsh industry environment.It can be used to connect the field networks with cloud or IoT applications. It is
designed from the ground up to meet the challenges of rugged applications at competitive prices,ideal for small
business or small order with scale milti-level demands.
1.1 Features
State-of-the-art Aluminium chassis for Harsh environment
Integrated passive heat sink
Built-in mini PCIe socket for RF module, such as 4G, WI-FI, Lora or Zigbee
SMA antenna holes x2
Built in UPS with supercap for safe shutdown
Encryption chip ATECC608A
Hardware Watchdog
RTC with Super Capacitor
Isolated DI&DO terminal
35mm DIN Rail support
Wide power supply from 9 to 36V DC
These features make the EdgeBox-RPI4 designed for easy setup and quick deployment for typical
industrial applications, such as status monitoring, facility management,digital signage and remote control of
public utilities.Furthermore, it is a user-friendly gateway solution with 4 cores ARM Cortex A72 and most
industry protocols can save on total deployment costs including electrical power cabling cost and help reduce
the product’s deployment time. Its ultra-lightweight and compact design is the answer for applications in
space-constricting environments ensures it can operate reliably in a variety of extreme environments
including in-vehicle applications.
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1.2 Interfaces
1Multi-Func phoenix connector
Note Func name PIN # PIN# Func name Note
POWER 1 2 GND
RS485_A 3 4 RS232_RX
RS485_B 5 6 RS232_TX
RS485_GND 7 8 RS232_GND
DI0- 9 10 DO0_0
DI0+ 11 12 DO0_1
DI1- 13 14 DO1_0
DI1+ 15 16 DO1_1
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NOTE: 24awg to 16awg cable are suggested
2Ethernet connector
3USB 2.0 x 2
4HDMI
5LED2
6LED1
7SMA antenna 1
8Console(USB type C)
9SIM card slot
10 SMA antenna 2
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1.3 Block Diagram
The processing core of the EdgeBox-RPI4 is a Raspberry CM4 board. A OpenEmbed specific base
board implements the specific features. Refer to next figure for the block diagram.
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2. Installation
2.1 Mounting
The EdgeBox-RPI4 is intended for two wall mounts, as well one with 35mm DIN-rail . Refer to next figure
for the recommended mounting orientation.
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2.2 Connectors and Interfaces
2.2.1 Power supply
Pin# Signal Description
1 POWER_IN DC 9-36V
2 GND Ground (Reference potential)
The PE signal is optional. If there is no EMI present ,the PE connection can left open.
2.2.2 Serial Port (RS232 and RS485)
Pin# Signal Description
4 RS232_RX RS232 receive line
6 RS232_TX RS232 transmit line
8 GND Ground (Reference potential)
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Pin# Signal Description
3 RS485_A RS485 difference line high
5 RS485_B RS485 difference line low
7 RS485 _GND RS485 Ground (isolated from GND)
The RS485_GND signal is isolated with “GND” signal. If a shielded twisted pair wire is used ,the RS485
_GND is connected to the shield.
NOTE:The 120 Ohm termination resistor for RS485 has been installed inside.
2.2.3 DI&DO
Pin# Signal of
terminal
PIN Level of
active
PIN of GPIO from
BCM2711
NOTE
09 DI0-
HIGH GPIO17
11 DI0+
13 DI1- HIGH GPIO27
15 DI1+
10 DO0_0 HIGH GPIO23
12 DO0_1
14 DO1_0
HIGH GPIO24
16 DO1_1
NOTE:
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NOTE:
1. DC voltage for input is 24V(+- 10%).
2. DC voltage for output should be under 60V ,the current capacity is 500ma.
3. Channel 0 and channel 1 of input are isolated to each other
4. Channel 0 and channel 1 of output are isolated to each other
2.2.4 HDMI
Directly connected to the Raspberry PI CM4 board with TVS array.
2.2.5 Ethernet
Ethernet interface is same as Raspberry PI CM4,10/100/1000-BaseT supported, available through the shielded
modular jack. Twisted pair cable or shielded twisted pair cable can be used to connect to this port.
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2.2.6 USB HOST
There are two USB interfaces at the connector panel.The two ports share the same electronic fuse.
NOTE: Max current for both ports is limited to 1000ma.
2.2.7 Console(USB typeC)
The design of console used a USB-UART converter, most OS of the computer have the driver, if not , the
link below may be useful:
https://www.silabs.com/products/interface/usb-bridges/classic-usb-bridges/device.cp2104
This port is used as a Linux console default.You can log into the OS use the settings of 115200,8n1(Bits: 8,
Parity: None, Stop Bits: 1, Flow Control: None).A terminal program such as putty is needed,too.
The default user name is pi and password is raspberry.
2.2.8 LED
EdgeBox-RPI4 use two green/red dual colour LED as outside indicators.
LED1: green as power indicator and red as eMMC active.
LED2: green as 4G indicator and red as user programmable led connected to GPIO21,low
active,programmable.
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EdgeBox-RPI4 also use two green colour LED for debug.
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2.2.9 SMA Connector
There are two SMA Connector holes for antennas. The antenna types are very depend on what modules
fitted into the Mini-PCIe socket. The ANT1 is default used for Mini-PCIe socket and ANT2 is for Internal
WI-FI signal from CM4 module.
NOTES:
1. The functions of the antennas are not fixed,maybe adjusted to cover other usage.
2.2.10 NANO SIM card slot
The sim card is only needed in cellular(4G,LTE or others based on cellular technology ) mode.
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NOTES:
1.Only NANO Sim card is accepted,pay attention to the card size.
2.The NANO sim card is inserted with chip side top.
2.2.11 Mini-PCIe
The orange area is the rough Mini-PCIe add-on card position,only one m2x5 screw is needed.
The table below show all the signals. Full size Mini-PCIe card are supported.
Signal PIN# PIN# Signal
1 2 4G_PWR
3 4 GND
5 6 USIM_PWR
7 8 USIM_PWR
GND 9 10 USIM_DATA
11 12 USIM_CLK
13 14 USIM_RESET#
GND 15 16
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17 18 GND
19 20
GND 21 22 PERST#
23 24 4G_PWR
25 26 GND
GND 27 28
GND 29 30 UART_PCIE_TX
31 32 UART_PCIE_RX
33 34 GND
GND 35 36 USB_DM
GND 37 38 USB_DP
4G_PWR 39 40 GND
4G_PWR 41 42 4G_LED
GND 43 44 USIM_DET
SPI1_SCK 45 46
SPI1_MISO 47 48
SPI1_MOSI 49 50 GND
SPI1_SS 51 52 4G_PWR
NOTE 1: All blank signals are NC(no connect).
NOTE 2: 4G_PWR is the individual power supply for Mini-PCIe card . It can be shout down or turn on
by the GPIO6 of CM4,the control signal is high active.
R79
10K
R0402
VCC_3V3
5V0
R81 22R
R0402
GPIO6
R80
47K
R0402
C69
10uF
C0603
R82
10K
R0402
C70
18pF
C0402
L4
NR3015T2R2M
ind_lps3015
U23
SY8089
sot_23_5
EN
1
GND
2
SW 3
VIN
4
FB 5
4G_PWR
+
C71
22uF
C0805
12
+
C72
22uF
C0805
12
NOTE 3:4G_LED signal is connected to LED2 internally, refer to section of 2.2.8.
NOTE 4: SPI1 signals are used only for LoraWAN card, such as SX1301,SX1302 from the third company.
2.2.12 M.2
EdgeBox-RPI4 equipped a M.2 socket of M KEY type .ONLY 2242 size NVME SSD card is support,NOT
msata.
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3. Drivers and Programming Interfaces
3.1 LED
The is a LED used as user indicator, refer to 2.2.8 .
Use LED2 as a example to test the function.
$ sudo -i #enable root account privileges
$ cd /sys/class/gpio
$ echo 21 > export #GPIO21 which is user LED of LED2
$ cd gpio21
$ echo out > direction
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$ echo 0 > value # turn on the user LED, LOW active
OR
$ echo 1 > value # turn off the user LED
3.2 Serial Port (RS232 and RS485)
There are two individual serial ports in the system. The /dev/ttyUSB1 as RS232 port and
/dev/ttyUSB0 as RS485 port. Use RS232 as a example.
$ python
>>> import serial
>>> ser=serial.Serial('/dev/ttyUSB1',115200,timeout=1)
>>> ser.isOpen()
true
>>> ser.isOpen()
>>> ser.write('1234567890')
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3.3 Cellular over Mini-PCIe
Use Quectel EC20 as a example and follow the steps :
1. Insert the EC20 into Mini-PCIe socket and micro sim card in related slot, connect the antenna.
2. Log in the system via console use pi/raspberry.
3. Turn on the power of Mini-PCIe socket and release the reset signal.
$ sudo -i #enable root account privileges
$ cd /sys/class/gpio
$ echo 6 > export #GPIO6 which is POW_ON signal
$ echo 5 > export #GPIO5 which is reset signal
$ cd gpio6
$ echo out > direction
$ echo 1 > value # turn on the power of Mini PCIe
AND
$ cd gpio5
$ echo out > direction
$ echo 1 > value # release the reset signal of Mini PCIe
NOTE: Then the LED of 4G is start to flash.
4. Check the device:
$ lsusb
$ Bus 001 Device 005: ID 2c7c:0125 Quectel Wireless Solutions Co., Ltd. EC25 LTE modem
……
$ dmesg
$
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……
[ 185.421911] usb 1-1.3: new high-speed USB device number 5 using dwc_otg
[ 185.561937] usb 1-1.3: New USB device found, idVendor=2c7c, idProduct=0125, bcdDevice= 3.18
[ 185.561953] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 185.561963] usb 1-1.3: Product: Android
[ 185.561972] usb 1-1.3: Manufacturer: Android
[ 185.651402] usbcore: registered new interface driver cdc_wdm
[ 185.665545] usbcore: registered new interface driver option
[ 185.665593] usbserial: USB Serial support registered for GSM modem (1-port)
[ 185.665973] option 1-1.3:1.0: GSM modem (1-port) converter detected
[ 185.666283] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB2
[ 185.666499] option 1-1.3:1.1: GSM modem (1-port) converter detected
[ 185.666701] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB3
[ 185.666880] option 1-1.3:1.2: GSM modem (1-port) converter detected
[ 185.667048] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB4
[ 185.667220] option 1-1.3:1.3: GSM modem (1-port) converter detected
[ 185.667384] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB5
[ 185.667810] qmi_wwan 1-1.3:1.4: cdc-wdm0: USB WDM device
[ 185.669160]qmi_wwan 1-1.3:1.4 wwan0: register 'qmi_wwan' at usb-3f980000.usb-1.3, WWAN/QMI
device,xx:xx:xx:xx:xx:xx
xx:xx:xx:xx:xx:xx is the MAC address.
$ ifconfig -a
……
wwan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 169.254.69.13 netmask 255.255.0.0 broadcast 169.254.255.255
inet6 fe80::8bc:5a1a:204a:1a4b prefixlen 64 scopeid 0x20<link>
ether 0a:e6:41:60:cf:42 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 165 bytes 11660 (11.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
5. How to use AT command
$ miniterm --- Available ports:
--- 1: /dev/ttyAMA0 'ttyAMA0'
--- 2: /dev/ttyUSB0 'CP2105 Dual USB to UART Bridge Controller'
--- 3: /dev/ttyUSB1 'CP2105 Dual USB to UART Bridge Controller'
--- 4: /dev/ttyUSB2 'Android'
--- 5: /dev/ttyUSB3 'Android'
--- 6: /dev/ttyUSB4 'Android'
--- 7: /dev/ttyUSB5 'Android'
--- Enter port index or full name:
$ miniterm /dev/ttyUSB5 115200
Some useful AT command :
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AT //should return OK
AT+QINISTAT //return the initialization status of (U)SIM card, the response should be 7
AT+QCCID //returns the ICCID (Integrated Circuit Card Identifier) number of the (U)SIM card
6. How to dial
$su root
$ cd /usr/app/linux-ppp-scripts
$./quectel-pppd.sh
Then the 4G led is flashing.
If success, the return like this:
7. Add the router path
$ route add default gw 10.64.64.64 or your gateway XX.XX.XX.XX
Then have a test
$ ping google.com
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