Ew11 Firmware
AT+VER
Always read the release notes: minor versions (1.2.x) are safe; major jumps (1.x to 2.x) may require configuration migration. ew11 firmware
Some firmware updates reset certain parameters (e.g., keep-alive timers, Modbus slave IDs). Always re-apply your backup configuration after testing. AT+VER Always read the release notes: minor versions (1