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OCPP 1.6J · 2.0.1 · 2.1

We speak every version of OCPP.

Charger onboarding, remote start/stop, firmware updates, diagnostics, configuration, full message coverage. One CSMS talks to 1.6J, 2.0.1 and 2.1 chargers side by side, whatever the brand.

Book a demoHow OCPP works

Charger

CP-A01

Available

CSMS

ocpp2.0.1

● wss

Charger → CSMSCALL
[2, "19a2", "BootNotification", {"reason":"PowerUp","chargingStation":{"model":"AC-22","vendorName":"…"}}]

Simulated session. Field names follow each version’s spec; values are placeholders.

How OCPP actually works

Each charger opens one WebSocket to the CSMS and keeps it open. Both sides then send small JSON frames over it, in real time.

One frame, four parts

[,,,]

MessageTypeId

What kind of frame this is. 2 is a request (CALL).

The version is agreed when the socket opens

GET /ocpp/CP-A01 HTTP/1.1
Upgrade: websocket
Sec-WebSocket-Protocol: ocpp2.1, ocpp2.0.1, ocpp1.6

HTTP/1.1 101 Switching Protocols
Sec-WebSocket-Protocol: ocpp2.0.1

Five kinds of frame

  • 2CALLA request, from either side
  • 3CALLRESULTThe successful reply
  • 4CALLERRORThe request failed
  • 5CALLRESULTERRORA reply that couldn't be processed2.1
  • 6SENDA one-way message, no reply expected2.1

A reply always reuses the request’s MessageId. That’s how a CSMS juggling thousands of chargers keeps every conversation straight.

Three live versions. One CSMS.

OCPP 1.6 and 2.0.1 aren't compatible with each other; 2.1 builds on 2.0.1. Our CSMS speaks all three, so a mixed network just works.

  1. 2015 We support

    OCPP 1.6

    • JSON over WebSocket (1.6J) alongside SOAP
    • Smart charging for load balancing and charge profiles
    • Local list management

    The worldwide de facto standard, still widely deployed.

  2. 2018Superseded

    OCPP 2.0

    • An entirely new set-up for OCPP 2.x

    Not compatible with 1.x. Succeeded by 2.0.1.

  3. 2020 We support

    OCPP 2.0.1

    IEC 63584 · 2024

    • Device management and monitoring
    • Improved transaction handling
    • Added security
    • Smart charging and ISO 15118
    • Display messages

    Approved as international standard IEC 63584 in 2024.

  4. 2025 We support

    OCPP 2.1

    IEC 63584-210 · 2025

    • Bidirectional charging (V2X)
    • DER control
    • Battery swapping
    • Local cost calculation
    • Prepaid cards, ad hoc card payment, dynamic QR codes

    Builds on 2.0.1: application logic for 2.0.1 stays compatible.

Run every charger from one place

Start, stop, reset, update and limit any charger on the network, remotely. No site visits for the things software can fix.

Remote control

Any brand, any version

Every OCPP charger connects, whatever the brand. 1.6J, 2.0.1 and 2.1 run side by side on the same network.

Secure by default

Encrypted connections, with certificates on both ends where your chargers support it. Signed firmware updates.

OCPP 2.1

Ready for what’s next

The newest version of OCPP is already supported, so your network is ready when vehicles and grids are.

  • Bidirectional charging (V2X)
  • DER control
  • Battery swapping
  • Local cost calculation
  • Dynamic QR codes
  • Prepaid & ad hoc card payments

What we do with OCPP

From the first BootNotification to a network in production, one team owns the protocol layer.

“He navigated complex communication flows between charge points and backend systems with ease and precision.”
Octagotech · India · OCPP development
Talk to an OCPP engineerConsultation pricing
  • Charger onboardingAny OCPP charger, whatever the brand, connected and configured.
  • Remote operationsRemote start/stop, firmware updates, diagnostics, configuration.
  • Smart chargingCharging profiles, dynamic load balancing, peak shaving.
  • IntegrationSeamless OCPP 1.6/2.0.1 setup for charger and roaming support.
  • TestingEvery flow exercised against OCPP simulators before real chargers.
  • ConsultationOCPP, CSMS architecture and EV software compliance.

Protocol facts from the Open Charge Alliance.

Let’s talk

Ready to switch on your charging network?

Book a 30-minute call with our team. Whether it’s your first charger or a growing network, you’ll leave with a clear plan.

Ready when you areBook your call

30 min · on Calendly

  1. 1

    Tell us where you are

    Your chargers, your market, and what you want to launch.

  2. 2

    We map the build

    CSMS, OCPP and OCPI, payments and apps, scoped to your business.

  3. 3

    Leave with a plan

    A clear next step, whether you build your own or start on ours.

Prefer to message?

WhatsAppmehmedkhan16@gmail.com+91 70570 45789

Mumbai, India · working with EV teams worldwide