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Custom OpenWrt-RM04 8/32Mb Module

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Description

Custom HLK-RM04 module

This Custom OpenWRT RM04 module with default 8 Mb flash memory and 32Mb ram is our most advanced module available with custom OpenWrt options. This pre installed and/or configured OpenWrt image for the HLK-RM04 module can be customized to meet every business or industrial need for serial or Uart communications.

We also provide cloud solutions to make your application available in a very low cost cloud based solution. Securely connect your Uart / Serial devices to a Datacenter and make them accesable to whom and where you want.

Default configurations, extra installed packages that will survive factory resets and allow for quick deployments of this highly customizable HLK RM04 module.

The current set of basic packages for this custom HLK RM04 module are;

OpenWRT Packages

Installed packages Package version
base-files 197-r9358-ca13820d13
busybox 1.30.1-1
dnsmasq 2.80-8
dropbear 2017.75-9
firewall 2019-01-02-70f8785b-2
fstools 2018-12-28-af93f4b8-4
fwtool 1
hostapd-common 2018-12-02-c2c6c01b-1
ip6tables 1.8.2-3
iptables 1.8.2-3
iw 4.14-1
iwinfo 2018-12-25-dd508af4-1
jshn 2018-07-25-c83a84af-2
jsonfilter 2018-02-04-c7e938d6-1
kernel 4.14.101-1|dcefc33dc02fffde32568242f9896e22
kmod-cfg80211 4.14.101+4.19.7-1-2
kmod-eeprom-93cx6 4.14.101-1
kmod-gpio-button-hotplug 4.14.101-2
kmod-ip6tables 4.14.101-1
kmod-ipt-conntrack 4.14.101-1
kmod-ipt-core 4.14.101-1
kmod-ipt-nat 4.14.101-1
kmod-ipt-offload 4.14.101-1
kmod-leds-gpio 4.14.101-1
kmod-lib-crc-ccitt 4.14.101-1
kmod-lib-crc-itu-t 4.14.101-1
kmod-mac80211 4.14.101+4.19.7-1-2
kmod-nf-conntrack 4.14.101-1
kmod-nf-conntrack6 4.14.101-1
kmod-nf-flow 4.14.101-1
kmod-nf-ipt 4.14.101-1
kmod-nf-ipt6 4.14.101-1
kmod-nf-nat 4.14.101-1
kmod-nf-reject 4.14.101-1
kmod-nf-reject6 4.14.101-1
kmod-ppp 4.14.101-1
kmod-pppoe 4.14.101-1
kmod-pppox 4.14.101-1
kmod-rt2800-lib 4.14.101+4.19.7-1-2
kmod-rt2800-mmio 4.14.101+4.19.7-1-2
kmod-rt2800-soc 4.14.101+4.19.7-1-2
kmod-rt2x00-lib 4.14.101+4.19.7-1-2
kmod-rt2x00-mmio 4.14.101+4.19.7-1-2
kmod-slhc 4.14.101-1
libblobmsg-json 2018-07-25-c83a84af-2
libc 1.1.21-1
libgcc1 7.4.0-1
libip4tc0 1.8.2-3
libip6tc0 1.8.2-3
libiwinfo-lua 2018-12-25-dd508af4-1
libiwinfo20181126 2018-12-25-dd508af4-1
libjson-c2 0.12.1-3
libjson-script 2018-07-25-c83a84af-2
liblua5.1.5 5.1.5-2
liblucihttp-lua 2019-01-24-1afbdcc3-1
liblucihttp0 2019-01-24-1afbdcc3-1
libnl-tiny 0.1-5
libpthread 1.1.21-1
libubox20170601 2018-07-25-c83a84af-2
libubus-lua 2018-10-06-221ce7e7-1
libubus20170705 2018-10-06-221ce7e7-1
libuci20130104 2018-08-11-4c8b4d6e-2
libuclient20160123 2018-11-24-3ba74ebc-1
libxtables12 1.8.2-3
logd 2018-12-18-876c7f5b-1
lua 5.1.5-2
luci git-19.046.56017-7f791e9-1
luci-app-firewall git-19.046.56017-7f791e9-1
luci-app-opkg git-19.046.56017-7f791e9-1
luci-app-ser2net git-19.046.56017-7f791e9-1
luci-base git-19.046.56017-7f791e9-1
luci-lib-ip git-19.046.56017-7f791e9-1
luci-lib-jsonc git-19.046.56017-7f791e9-1
luci-lib-nixio git-19.046.56017-7f791e9-1
luci-mod-admin-full git-19.046.56017-7f791e9-1
luci-mod-network git-19.046.56017-7f791e9-1
luci-mod-status git-19.046.56017-7f791e9-1
luci-mod-system git-19.046.56017-7f791e9-1
luci-proto-ipv6 git-19.046.56017-7f791e9-1
luci-proto-ppp git-19.046.56017-7f791e9-1
luci-theme-bootstrap git-19.046.56017-7f791e9-1
mtd 24
netifd 2019-01-31-5cd7215a-1
odhcp6c 2019-01-11-d2e247d8-16
odhcpd-ipv6only 2019-01-16-0a367680-3
openwrt-keyring 2018-05-18-103a32e9-1
opkg 2019-01-31-d4ba162b-1
ppp 2.4.7.git-2018-06-23-1
ppp-mod-pppoe 2.4.7.git-2018-06-23-1
procd 2018-12-27-e2b055ed-1
rpcd 2018-11-28-3aa81d0d-1
rpcd-mod-rrdns 20170710
ser2net 3.5.1-1
swconfig 12
ubox 2018-12-18-876c7f5b-1
ubus 2018-10-06-221ce7e7-1
ubusd 2018-10-06-221ce7e7-1
uci 2018-08-11-4c8b4d6e-2
uclient-fetch 2018-11-24-3ba74ebc-1
uhttpd 2018-11-28-cdfc902a-2

Conclusion

For the rest this unit has 2 working Uart ports, working WAN and LAN port, default opkg installable packages.

This unit is not suitable for attaching RJ-45 connectors or RS232 connector. For a solution to directly attach a cable please see our kits which include a development board for attaching cables and connectors to the HLK-RM04 unit.

We also provide solutions for developing a custom build development board that can suit every need.

 


Default specifications

HLK-RM04 is a low-cost embedded UART-ETH-WIFI module (serial port – Ethernet – Wireless network) developed by Shenzhen Hi-Link Electronic co., Ltd. The HLK-RM04 is an embedded module based on the universal serial interface network standard.

Built-in TCP / IP protocol stack, enabling the user serial port, Ethernet, wireless network (wifi) interface between the conversions. Through the HLK-RM04 module, the traditional serial devices do not need to change any configuration; data can be transmitted through the ethernet providing a quick solution for the user’s serial devices to transfer data via ethernet.

Custom OpenWRT RM04 module Connection types

1.Summarize

Technical Specifications

Network standard wirelessIEEE 802.11n IEEE 802.11g IEEE 802.11b
wiredIEEE 802.3 IEEE 802.3u
Wireless transmission rate 11n: maximum up to 150Mbps
11g: maximum up to 54Mbps
11b: maximum up to 11Mbps
Tracks number 1-14
Frequency range 2.4-2.4835G
Emission power 12-15DBM
Interface 10/100Mbps LAN/WAN multiplex interface interface
Antenna
Antenna type optional External Antenna
Functional Parameters
WIFI work mode Client/AP/Router
WDS Function Support WDS wireless bridge connection
Wireless security MAC address filtering (wireless)
Wireless security function switch
64/128/152 bit WEP encryption
WPA-PSK/WPA2-PSKWPA/WPA2 security mechanism
Network management Remote Web management
Configuration file import and export
WEB software upgrade
Serial to Network
Maximum transmission rate 230400bps
TCP connection Max connection number>20
UDP connection Max connection number>20
Serial baud rate 50~230400bps
Other Parameters
Status indicator Status indicator
Environmental standard Operating temperature-20-70℃
Operating humidity10%-90%RH
Storage temperature-40-80℃
Storage humidity5%-90%RH
Additional properties Frequency bandwidth optional20MHz40MHz ,Auto

2.Hardware Explanation

   Mechanical Dimensions

HLK-RM04 Mechanical Dimensions is shown in the following picture:
Custom OpenWRT RM04 module Dimensions

3. Pin Interface for our Custom OpenWRT RM04 module

The Pins of the hlk-rm04 are as shown below

Number Function Direction Explanation
1 VCC Power in 5V Power supply input
2 GND GND Power ground
3 WLAN led O WiFi startup indicator (Valid on high level)
4 VDD Power out 3,3V Power output
5 Link2 O Net port 2 connection indicator (Valid on lower level)
6 USB_P I/O USB signal +
7 USB_M I/O USB signal –
8 STA/GPIO_0 I/O Status indicator GPIO_0 (Valid on lower level)
9 GPIO_1 I/O GPIO_1
10 ES/RST I Exit transparant transmission mode/restore factory values
11 TXOP2 A Net port 2 TX-P
12 TXON2 A Net port 2 TX-N
13 RXIP1 A Net port 1 RX-P
14 RXIN1 A Net port 1 RX-N
15 RXIN2 A Net port 2 RX-N
16 RXIP2 A Net port 2 RX-P
17 TXON1 A Net port 1 TX-N
18 TXOP1 A Net port 1 TX-P
19 RTS_N/GPIO_2 I/O UART 2 RTS
20 UART_RX I UART 1 RX
21 UART_TX O UART 1 TX
22 RXD/GPIO_3 I/O UART 2 RX
23 LINK1 I/O Net port 1 connection indicator (Valid on lower level)
24 CTS_N/GPIO_4 O UART 2 CTS
25 WPS/RST I WPS button / restore factory values
26 TXD/GPIO_5 O UART 2 TX
27 VDD_1_8 Power out Net port 1.8V output
28 VCC Power in 5V input

4. Electrical Characteristics for our Custom OpenWRT RM04 module

Exceeding these conditions will result in damage to the device.

Parameter Min Max
Module supply voltage VCC 3.9V 5.5V
Module Voltage Output VO3.3 3.1V 3.5
Module Voltage Output VO1.8 1.65V 1.9
GPIO Voltage 3.1V 3.5V
Storage temperature -40ºC 95ºC

Additional information

Brand

Hi-Link

mpn

Not available

1 review for Custom OpenWrt-RM04 8/32Mb Module

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  1. Anonymous (verified owner)

    Verified reviewVerified review - view originalExternal link

    Build and delivered as requested.

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