RMS-100 – Remote Monitoring System

RMS-100 – The baby RMS; Is a unique remote voltage monitoring, data acquisition, and control device specifically designed for use with battery powered wireless internet repeater sites, or other AC & DC powered remote equipment. RMS-100 Has ultra low power consumption and won’t put a drain on your power source. Uses only 1.2 watts! RMS-100 Is powered by DC voltage from 10 to 60 volts. RMS-100 Uses embedded Ethernet technology for internet data acquisition and remote voltage monitoring. RMS-100 Uses the LINUX operating system for versatility, stability, and security. RMS-100 Gives you the situational awareness you need to keep your equipment operational and reliable.

Main Features

  • Six layer PCB with Nickel Immersion Gold plating and red solder mask.
  • 400 – MHz Arm Processor (500 Mips !).
  • 256 – megs of Nand Flash. Create and store custom applications.
  • 64 megs of SD-Ram.
  • Dual Low Noise Switching Power Supplies accepts 8 – 60 vdc input. Can be powered directly from 12, 24, or 48 volt battery banks.
  • Battery backed-up, real-time clock.· One onboard temperature sensor –25c +100c.
  • Three 24 bit isolated voltmeters (+/- 100 VDC). Each voltmeter has its own 24 bit Delta Sigma ADC.
  • Each voltmeter can be put into low voltage shunt mode (+/- 2 VDC).
  • Two Power Relays for devices using 1 – 240v -5 amps AC/DC current.
  • Four general purpose I/O pins.
  • Five dedicated alarm pins.
  • One console serial port.
  • Two USB 2.0 ports for cameras, wireless clients, extra Ethernet, etc.
  • Runs real Linux! 2.6.33 kernel.
  • Send SMS messages, Email alerts, SNMP traps, Remote Syslog Messages.
  • Ping watchdog, power cycle equipment after a set amount of ping timeouts.
  • Command line utilities: ping, ftp, email, relays, etc.
  • Flash new firmware over the internet.
  • Duel Watchdog Reset circuits, processor integrated, and extra hardware.
  • Control RMS-100 via web page, telnet, ssh, or snmp.
  • Full SNMP v1, v2, v3 support (default v3).
  • Supports external USB relays and voltmeters.
  • Hardware is user accessible from files on the board.
  • Make your own utilities and scripts to upload. (Bash, PHP, Python, Lua)
  • Pluggable connectors for ease of use.


  • Use RMS-100 to monitor battery levels, room temperature, signal strength (RSSI) on radios and more. RMS-100 has 3 onboard isolated voltmeters giving it the ability to measure DC voltage from -100 to +100 volts with 24 bit accuracy.RMS-100 also has 2 power relays giving it the unique ability to turn on/off devices remotely using an Internet connection.
  • Use the power relays to remote start a generator.
  • RMS-100 has 5 dedicated input pins used for door alarms, motion sensors, or to monitor solar panel trip wires.
  • RMS-100 has two USB 2.0 ports that support several USB devices concurrently using a USB hub. Control USB cameras, store data on USB flash drives, control USB speakers etc. RMS-100 has input and output pins used to control your own custom devices.
  • RMS-100 has ping monitor software that allows you to monitor network devices and alert you to failure and possibly power cycle the device. Monitor all this information remotely over an Internet connection using an ordinary web browser.
  • RMS-100 gives you direct hardware control of fans, lights, computers, cameras, modems, radios, etc… No more guessing what your battery levels are. No more wondering if your signal strengths are at an acceptable level. No more long drives to reset a fussy radio. Let RMS-100 do this all remotely via the Internet.


RMS-100 Has Two Power Relays Remote Control Of AC/DC Powered Equipment








RMS-100 has two power relays for remote control of AC/DC powered equipment. Each relay has a manual override button that can toggle the relay; useful for on-site testing. Each relay also has a jumper shunt connector that allows the relay to be engaged manually for hands-free testing.

Control of each relay can be done with a web browser. The picture below shows a portion of the RMS-100 relays web interface. In the picture below all relays are in the default “Normally Closed” position. By clicking on the relay 1 icon….




The relay will be toggled to the “Normally Open” position as shown below.


RMS-100 Has Three 24 Bit Isolated Voltmeters For Sampling DC Voltages Up To 100 Volts!

Each voltmeter is capable of measuring up to +/- 100 VDC with 24-bit accuracy. Each voltmeter has its own 24 bit Delta Sigma ADC. The data and power lines for each voltmeter are isolated with a chip-scale air core transformer. This enables each voltmeter to measure different DC voltage sources without any effect on the main board or other voltages.
This technology enables the ability to measure (but not limited to):

  • Positive and negative voltages
  • Separate power sources
  • Individual batteries in a battery bank
  • Shunt voltages for equipment that may be drawing or generating power.
  • Solar panel voltage and amperage
  • Wind turbine voltage and amperage
  • Battery charger voltage and amperage

Each voltmeter has a Mode Jumper that when removed puts the voltmeter into low voltage mode. In this mode, the volmeter has a range of +/- 2.0 VDC and has over 4 million steps. This is perfect for calculating amperage by measuring voltage drop across a current shunt.


Remote monitoring - voltage - temperature