Firmware Update via USB port
This update provides support for SeaGaugeG4 WIFI Gateways with NMEA 2000 interfaces.
New Supported Functions
- J1939 Alarm Messages via DTC1 0x0FECA (65266)
- SPN 110 FMI 0 - ALARM_MESSAGE_J1939_ENG_TEMP_HIGH
- SPN 100 FMI 0 - ALARM_MESSAGE_J1939_ENG_OIL_LOW
- SPN 100 FMI 1 - ALARM_MESSAGE_J1939_ENG_OIL_HIGH
- SPN 102 FMI 1 - ALARM_MESSAGE_J1939_ENG_BOOST_LOW
- SPN 102 FMI 0 - ALARM_MESSAGE_J1939_ENG_BOOST_HIGH
- SPN 168 FMI 1 - ALARM_MESSAGE_J1939_ENG_VOLT_LOW
- SPN 173 FMI 0 - ALARM_MESSAGE_J1939_ENG_EGT_HIGH
- SPN 190 FMI 0 - ALARM_MESSAGE_J1939_ENG_SPEED_HIGH
- SPN 101 FMI 16 - ALARM_MESSAGE_J1939_ENG_CRANKCASE_HIGH
- SPN 94 FMI 16 - ALARM_MESSAGE_J1939_ENG_FUELFLOW_LOW
- SPN 177 FMI 0 - ALARM_MESSAGE_J1939_TRAN_TEMP_HIGH
- SPN 177 FMI 1 - ALARM_MESSAGE_J1939_TRAN_PRESSSURE_LOW
- Fast CAN BUS updates for NMEA2000/J1939 RPM and Fuel Flow PGN (0.5 sec)
- Updated J1939 sensor calibration files
- Increased CAN bus update interval for PGN127488 to 0.25 sec
- added defaults for pulse intervals
This update contains one seagaugeg4_9_25_22.bin and windows 11/10 utility to update via USB port
The complete update requires the following steps.
1) Unzip download to local windows directory
2) Connect SeaGaugeG4 with supplied USB cable to Windows OS 11/10
3) Launch the flash_download_tool_3.9.3.exe tool
4) Select ESP32 for DOWNLOAD MODE
5) Choose the download file and set the default address to 0
6) Choose the correct COM port and set baud to 115200
7) ERASE the existing firmware and spiffs partitions
8) START to upload new firmware
9) Reboot device to complete update
10) Reconnect to SeaGaugeG4 WFI using AP mode
***************** NOTE **************************
all current configurations will be reset to factory default
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Refer to app note https://digitalmarinegauges.com/content/SeaGauge/AN_SGG425090901_FirmwareUpdateUSB.pdf for complete details
release date 5/22/2026
