Low-Power Metering and Communications Module

RS-SE-401 is a complete IEEE 802.11 bgn Wi-Fi module for advanced water and gas meter applications. It is a fully self-contained module with an ultra low power microcontroller, power management unit and built-in diversity antennas along with an option to connect external antennas. It supports high RF power output, very good receiver sensitivity and antenna diversity enabling long range wireless connectivity. It includes a DLMS standard-compliant meter server stack providing ease of integration into metering devices. When used in Water or Gas meters, this module facilitates advanced metering features like hassle free remote metering, instantaneous consumption reports and remote detection of fault conditions like leaks or reverse flow, illegal usage and tampering. The RS-SE-401 includes WLAN and higher layer functionality with WPA2 security, IPSec, a network stack that terminates TCP/IP and UDP connections with IPv6 and configuration capability through wireless or UART. The module can provide a battery life of over 10 years with a 2000 mAh battery and is available in an easy-to-assemble 31mm x 44mm LGA package.


  • Compliant to 802.11 b/g and single stream 802.11n
  • Supports DLMS compliant meter server stack
  • 28 dBm Transmit Power and -98 dBm Sensitivity in the most-robust mode (1Mbps), along with antenna diversity enables longer range and robust connectivity
  • High Multipath tolerance of upto 2 micro-seconds maximum delay spread
  • Ultra low power operation, providing over 10-year battery life with 2000 mAh battery
  • Supports 802.11s mesh networking
  • Applications
  • Specifications


  • Water Meters communicating to utility through AMI home gateway
  • Gas Meters communicating to utility through AMI home gateway
  • Water Meters communicating to back-haul Metro Wi-Fi
  • Gas Meters communicating to back-haul Metro Wi-Fi
  • Battery operated Wi-Fi sensors with long-range requirement


  • IEEE 802.11b/g, 802.11n
  • 802.11n: 6.5, 13, 19.5, 26, 39, 52, 58.5, 65 Mbps 802.11a/g: 6, 9, 12, 18, 24, 36, 48, 54 Mbps 802.11b:1,2, 5.5,11 Mbps
  • OFDM with BPSK, QPSK, 16-QAM, and 64-QAM 802.11b with CCK and DSSS
  • 802.11b : 28dBm
    802.11g BPSK/QPSK : 28dBm
    802.11g 16-QAM : 26dBm
    802.11g 64-QAM 2/3 : 25dBm
    802.11g 64-QAM ¾ : 24dBm
    802.11n 64-QAM 5/6 : 23dBm
  • 802.11b 1Mbps : -98dBm
    802.11g 54Mbps : -75dBm
    802.11n 65Mbps : -71.5dBm
  • 802.11i:AES, TKIP, WEP, WPA, and WPA2
  • MCS 0-7, STBC, RIFS,Greenfield Protection, A-MPDU, A-MSDU Aggregation with Block-ack, PSMP, MTBA
  • TCP, ARP, UDP, IPv6, IPSec
  • Power save modes, Infrastructure, Adhoc and low-power peer-to-peer modes
  • JTAG
  • DLMS server (IEC 62056)
  • UART,Wireless
  • Industrial Grade -40ºC to +85ºC