RFID and PIN functions

RFIDs and PINs in the cFos Power Brain controller and Charging Manager

Master RFID card

The cFos Power Brain wallbox is supplied with an RFID clip and a master RFID card. This has the following functions:
Hang up 3 times: reset configuration to factory settings and restart
1 x hang up plus new card: learn new card. This is saved under the (active or only) user of the EVSE.

The RFID reader of the cFos Power Brain wallbox supports MIFARE cards with 13.56 MHz. You can buy these cheaply. Many common cards that you may already have in your wallet will also work. Unfortunately, EC cards and some credit cards cannot be read.

User and RFID management

Under "User", the administrator can set up new users and then add them to the settings of the respective EVSE. As soon as at least one user has been added to a EVSE, this EVSE only charges after authorization with this user. This can be done by entering the user ID, a PIN or an RFID. You can set up multiple PINs or RFIDs for each user. For example, a household can be added as a user of an EVSE and all household members receive their own RFID.

Each user can also add additional RFIDs or PINs with different functions and download a transaction log of their charging processes. To do this, he can enter a valid PIN, RFID or his user ID under "User" and then click "Manage users".

Show EVSE user when charging: If you give an RFID card a name, it will be displayed under "Start" in the EVSE tile when the user is charging under this RFID card. The global user name can also be displayed if you "Allow name display" and the RFID card does not contain a name.

Step-by-step instructions for setting up charging authorization on a EVSE

  1. Screenshot user settings
    Main menu "User" -> "Add user". A unique user ID is generated. Define user name -> "Save".
  2. Under "Wallbox assignment" you can now select the wallboxes at which the user is allowed to charge.
  3. Now you can enter a PIN or RFID manually or do a learning. After clicking on "Learn", place the RFID card on the corresponding wallbox. Click "Save".
  4. You can configure a name, functions and phases for the RFID card generated in this way.

Card functions

In addition to charging authorization, RFIDs (and PINs) can also have the function of temporarily stopping charging and switching phase use. If your wallbox does not have a counter that can determine the phases currently in use, but you would like to charge cars that charge on different phases, you can inform the cFos Charging Manager, ie the load management, of this by placing the appropriate RFID . This is important, for example, for solar excess charging, since the cFos Charging Manager needs to know how many phases the excess is divided into.

In time, other functions that you can carry out with the RFID card will probably be added. :-)

Note: Instead of using an RFID card, you can also authorize charging with the cFos Charging Manager App.

Fixed RFID

You can also set a "Fixed RFID" in the settings for each wallbox. This is used if no RFID was applied and no PIN was entered before the charging cable was plugged in. This is particularly useful for OCPP, where a corresponding backend charging process may only allow if an RFID (previously configured in the backend) is available. If you do not put on another RFID, the fixed RFID is also used in the transaction log.

HTTP API and external RFID reader

Every cFos Power Brain wallbox and also the Raspberry and Windows version of the cFos Charging Manager supports an HTTP API function:
/cnf?cmd=enter_rfid&rfid=r&dev_id=d
r is the PIN or RFID (digits), d is an optional device ID to select a specific EVSE. If no device id is selected, the Charging Manager tries to assign the PIN or RFID automatically.

This allows you to set up an external RFID reader (e.g. at a centrally accessible location) and enable the users of the EVSE(s) to authorize charging from there. Commercially available RFID readers connected to the USB port transmit the RFID using simulated keyboard entries. You can connect the e.g. Raspberry version of the cFos Charging Manager to a USB RFID reader and this then forwards the RFIDs to your EVSE or another cFos Charging Manager, call with:
charging_manager rfid dest
here at least is the address of the EVSE or the cFos Charging Manager that is to receive the RFIDs via HTTP API, e.g. 192.168.2.111. If you use a third-party box that does not have an RFID reader, you can retrofit such an RFID functionality with the cFos Charging Manager.