T-Halow RJ45 get it now

Overview

T-Halow RJ45 is a long-range, low-power wireless Ethernet bridge module integrating a HaLow (IEEE 802.11ah) wireless module with an RJ45 Ethernet interface. It supports Sub-1 GHz wireless networking with AP, STA, APSTA relay, and GROUP multicast modes. Features WPA-PSK encryption, roaming, relay, and low-power sleep modes. Configured via AT commands over a serial interface. Suitable for industrial IoT, remote monitoring, and smart agriculture applications.

Quick Start

Hardware Connection

Connect the module to a network device via the RJ45 interface, and connect to a host or debug tool via serial port.

Serial Configuration

Use a serial terminal to connect to the module. Send AT commands in newline mode (AT commands are case-insensitive).

Quick Pairing (No Pre-set SSID Required)

Set one device as AP (flip DIP switch to NO position) and another as STA (flip DIP switch to 1 position), then press the Connect button on both devices simultaneously. Wait for the CONN indicator to flash rapidly — this indicates successful pairing. Once paired, the RSSI LEDs will light up; more lit LEDs indicate stronger signal.

AT+PAIR=1   // Enable pairing on both AP and STA simultaneously
// Wait for PAIR SUCCESS message
AT+PAIR=0   // Stop pairing — devices connect automatically

Basic Network Setup (AP + STA)

AP side:

AT+MODE=AP
AT+SSID=my_network
AT+KEYMGMT=WPA-PSK
AT+PSK=baa58569a9edd7c3a55e446bc658ef76a7173d023d256786832474d737756a82

STA side:

AT+MODE=STA
AT+SSID=my_network
AT+KEYMGMT=WPA-PSK
AT+PSK=baa58569a9edd7c3a55e446bc658ef76a7173d023d256786832474d737756a82

After configuration the devices will connect automatically.

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Key Features

• HaLow (IEEE 802.11ah) Sub-1 GHz long-range wireless communication
• AP / STA / APSTA (relay) / GROUP (multicast) operating modes
• WPA-PSK encryption support
• Relay, roaming, and multicast support
• Low-power sleep mode
• RJ45 Ethernet interface
• AT command configuration via serial interface

Specifications

Parameter	Value
Wireless	HaLow IEEE 802.11ah Sub-1 GHz
Operating Modes	AP / STA / APSTA / GROUP
Encryption	WPA-PSK / NONE
Interface	RJ45 Ethernet + Serial (AT commands)
Firmware Version	huge-ic-ah_v1.6.4.3-38054_2025.12.12

AT Commands

Full AT command reference: docs/AT_cmd.md

Network

Command	Description
AT+MODE=[ap/sta/group/apsta]	Set operating mode
AT+SSID=[ssid]	Set SSID (max 32 chars)
AT+KEYMGMT=[WPA-PSK/NONE]	Set encryption type
AT+PSK=[64-char hex]	Set encryption password
AT+PAIR=[0/1]	Enable / stop pairing
AT+BSS_BW=[1/2/4/8]	Set channel bandwidth
AT+FREQ_RANGE=[start,end]	Set frequency range (unit: 0.1 MHz)
AT+CHAN_LIST=[freq1,freq2,...]	Set non-contiguous channel list (max 16)

Status Query

Command	Description
AT+RSSI=?	Query signal strength
AT+CONN_STATE	View connection state
AT+WNBCFG	View device parameters
AT+SCAN_AP=2	Scan for APs (STA mode)
AT+BSSLIST	Get scanned AP list
AT+MAC_ADDR=?	View device MAC address
AT+VERSION=?	View firmware version

Advanced Parameters

Command	Description
AT+TXPOWER=[6~20]	Set max TX power (dBm)
AT+ACKTMO=[us]	Set ACK timeout (for >1 km: 10 × (distance_km - 1))
AT+TX_MCS=[0~7/255]	Set TX MCS; 255 = auto
AT+HEART_INT=[ms]	Set heartbeat interval (recommended: STA_count × 50 ms)

Relay Mode (APSTA)

AT+MODE=APSTA
AT+R_SSID=upper_ap_ssid     // Set upstream AP SSID
AT+R_PSK=<64-char hex>       // Set upstream AP password

Roaming (STA only)

AT+ROAM=1   // Enable roaming
AT+ROAM=0   // Disable roaming

AP SSIDs support full or fuzzy matching (SSID length > 8 chars, last 3 chars differ, e.g. HUGE_IC_AH001, HUGE_IC_AH002).

Multicast Mode (GROUP)

AT+MODE=GROUP
AT+JOINGROUP=11:22:33:44:55:66,3   // Join multicast network with AID=3

Sleep Mode (STA)

Command	Description
AT+PS_MODE=0	No sleep (same as mode 3)
AT+PS_MODE=1	Sleep — module maintains server keepalive
AT+PS_MODE=2	Sleep — AP maintains keepalive (lowest power)
AT+PS_MODE=3	Sleep — maintains AP connection, unicast wakes device
AT+PS_MODE=4	Sleep — maintains AP connection, only AT+WAKEUP wakes device

Debug

AT+LOADDEF=1        // Restore factory defaults
AT+SYSDBG=LMAC,1   // Enable air interface statistics
AT+SYSDBG=WNB,1    // Enable network layer statistics

Operating Modes

Mode	Description
AP	Access point — acts as hotspot for STA devices
STA	Station — connects to an AP
APSTA	Relay — acts as both AP and STA simultaneously
GROUP	Multicast / broadcast mode

Firmware Upgrade

Firmware files are located in the firmware/ directory.

Current firmware version: huge-ic-ah_v1.6.4.3-38054_2025.12.12_.bin

Check firmware version:

AT+VERSION=?

Pin Diagram

Dimensions

Schematic

• T-Halow RJ45 V0.1 Schematic

Datasheet

Software Libraries

• T-Halow-RJ45 GitHub Repository
• AT Command Reference

FAQ

• Q. How do I pair two devices without pre-configuring SSID? A. Set one as AP (DIP switch to NO), the other as STA (DIP switch to 1), press the Connect button on both simultaneously, and wait for the CONN LED to flash rapidly.

• Q. Connection drops at long range. A. Increase ACK timeout: AT+ACKTMO=[us]. Formula: 10 × (distance_km − 1) microseconds.

• Q. How to reset to factory defaults? A. Run AT+LOADDEF=1.

• Q. How do I set up a relay? A. Set AT+MODE=APSTA, then configure AT+R_SSID and AT+R_PSK to point to the upstream AP.

Changelog

Version	Date	Notes
V0.1	—	Initial release