Firmware v1 register mappings

Legacy mapping reference for separately compiled firmware v1 variants.

Firmware v1 uses separately compiled firmware variants. The selected variant determines the mapping and its initial device ID, baud rate and serial format.

This is a legacy reference. Confirm the exact firmware variant installed on the dongle before relying on its mapping or communication defaults.

Native mappings

• Default P1 mapping

• Default float mapping

Meter emulations

• ABB B21

• DTSU666

• EM330 / EM340

• Inepro / KLEFR 6924

• Schneider Charge Pro

• SDM630

Legacy firmware variants remain available through the P1 Modbus web installer. Existing v1 dongles can also migrate to firmware v2.