- Length: Requirements can vary by manufacturer and may not always follow standard OCPP guidelines. Generally, the key must be 16 to 20 characters long. If you use a hexadecimal key (using only numbers and letters “a” through “f”), it must be 32 to 40 characters long.
- Format: Check whether the device requires specific characters.
- Firmware: Update the device to a version that supports the OCPP basic authentication security profile.
- Connection: Make sure that the device is online, and that the connection URL is correct.
