M2M Control C305

The M2M Control C305 is the economical variant of the M2M Control C310 GSM/GPRS remote control unit and is especially suitable for wireless monitoring & control, data logging and remote access. The C305 has a reduced feature set, but still maintains the crucial core functionalies of the C310 for a very low price.

  • 5 digital inputs  (4 configurable as S0 / IEC62053-31)
  • 3 digital outputs
  • 2 analog inputs     (1..10V, 0..20mA)
  • 2 analog outputs  (1..10V, 0..20mA)
  • and one RS-232 interface

The C305 telemetry module combines a freely programmable PLC controller, a data logger with an integrated GSM/GPRS modem. This makes the C305 to a very powerful solution for professional industrial wireless applications.

The GSM/GPRS based communication supports SMS/PDU messages, CSD data calls as well as an optimized host implemented TCP/IP stack with SMTP, FTP, UDP and MQTT protocol support.

The unit supports also our M2M GPRS Gateway middleware solution which enables a bidirectional without the need of fixed IP addresses.

The C305 is fully programmable (IEC 61131-3 ST) and configurable by the user-friendly M2M Control IDE development environment, either locally via serial port or remotely via GPRS network.

The hardware is based on our reliable X32-architecture (ARM7) and is equipped with advanced power management. The unit has extremely low power consumption and can be powered by batteries or solar panels. The M2M Control C305 has an industrial grade design, M36 DIN rail mounting and can be powered with wide range of supply voltage (9…36 VDC). 



  • Real-time clock
  • 4 bi-colored LED's
  • 1 MB for data logs
  • 2 MB flash memory for 
  • 3.5 MB flash for programs
  • 1 MB RAM / 8 KB FRAM
  • SIM card & SIM Chip
  • RS-232


  • MODBUS & M-Bus protocol support
  • S0 interface (IEC62053-31)
  • Voltage monitoring
  • Power saving modes
  • Vibration sensor
  • Temperature sensor
  • MQTT Protocol support
  • internal battery: 700 mAh



I/O Interface

  • 5 digital inputs    (4 configurable as S0 / IEC62053-31)
  • 3 digital outputs
  • 2 analog inputs:    0-10 Vdc or 0-20 mA (12 bit Resolution)
  • 2 analog outputs:  0-10 Vdc or 0-20 mA (10 bit Resolution)


  • GSM quad band (850/900/1800/1900 MHz)
    • CSD data call
    • SMS (text and PDU)
  • GPRS (multislot class 10) with TCP/IP
    •  FTP
    • SMTP
  • NMEA through the serial ports
  • IEC 60870-5,  IEC61850 (i.V.)
  • M-Bus (master),  EN13757
  • MQTT Protocol 


  • Quad band (850/900/1800/1900 MHz) GSM /GPRS
  • RS-232 Port

Power Supply

  • Operating voltage:    8-36 Vdc
  • Consumption:           45-55 mA @12 Vdc
                                        < 0,5 mA in powerdown-mode


  • Ethernet Interface
  • Bluetooth Interface
  • VGA Kamera