Open Vehicle Monitoring System (OVMS) WiFi/4G (SIM & ANT included)

£227.92 (Inc. VAT)
£189.93 (Ex. VAT)
600.00 Grams
Current Stock:
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Open Vehicle Monitoring hardware with 4G / WiFi connectivity. 


  • Real time EV telematics
  • OBD2 connection
  • WiFi / 4G IoT EU SIM (included) 
  • Android / iOS app
  • Fast and responsive
  • Remote Climate Control
  • Charging status notifications
  • Developer friendly API
  • Open-source ♥

Get it on Google Play


  • State of charge (SoC)
  • Range
  • Charging speed
  • GPS location
  • Odometer
  • Battery temperature
  • State of health
  • TPMS
  • 12V aux battery
  • Plus more...  

Service Cost

  • OVMS server logging: FREE 
  • 4G data: 1Mb/2Mb per month for normal usage included Hologram SIM costs approx $2.30 per month. See pricing. Any other micro SIM card on different network can be used.


  • V3.3 2022 Hardware Revision
  • Connectivity: WiFi  / GSM (4G)  / GPS / Bluetooth 
  • Modem: SIM57600G
  • Firmware update via OTA (WiFi / GSM), by Micro SD card, or over USB interface
  • Processor: ESP32 WROVER (160/240MHz, 16MB flash, 4MB SPI RAM, 520KB SRAM)
  • Processor core: Dual-core
  • Processor frequency: 160MHz/240MHz
  • Ports: Micro-USB, microSD, Internal Expansion Slot, GSM Antenna Port, GPS Antenna Port, DB9 Car Port, DB26 Expansion Port
  • Micro SD card logging
  • ODB2 output 
  • CAN bus no.: 3
  • Dimensions: 110mm x 80mm x 30mm

Frequency Bands

  • GMS/GPS/EDGE 850/900/1800/1900MHz, UMTS/HSDPA/HSPA+ B1/B2/B4/B5/B6/B8/B19, LTE-TDD B34/B38/B39/B40/B41, LTE-FDD B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28/B66




  • OVMS Hardware 
  • Hologram IO global SIM card (PRE INSTALLED INSIDE, small screwdriver required to replace)  
  • OBDII Cable (select appropriate for vehicle)
  • GSM Antenna (required for GSM)
  • GPS Antenna (required for GPS)

Choosing correct ODB2 cable

The correct OBD2 cable should be chosen to match the car, some cars e.g LEAF, Tesla & Kia Soul have specific cables.

All other cars use the generic cables which are available with the cable either coming out of the left-hand or right-hand side of the connector. The orientation of the connector can vary between RHD / LHD models and even different variants of the same model therefore it's advised to check in your car. Here are a list of cars and cable which have been known to work. 

  • UK RHD Kia e-Niro - Generic Left
  • UK RHD Hyundai Kona - Generic Left
  • Renault Twizy - Generic Left or Right 
  • MG ZS EV - Either Generic Right or Left will work, users have reported that using a Right cable allows for more tidy install

Note: an OBD2 extender or splitter can also be used if required, however ensure whatever extender/splitter is used has all the pins connected. 




OVMS Forum

OpenEnergyMonitor Forums

OpenEnergyMonitor Support Email:

OVMS Support Ticket (login required)



DEPTH 30 mm
HEIGHT 80 mm
WIDTH 110 mm