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M2 Firmware Upgrade

The meter firmware can be updated in one of two ways. The first optionis to use the Software Upgrade option in the Setup menu. The second option is to force the meter into upgrade mode on startup.

Each method involves using a USB memory stick connected to the USB port on the back of the meter. The USB port is a type A/B micro USB port. This port is also known as a Micro USB Host OTG. Available at Best Buy or Amazon: https://www.amazon.com/dp/B00LN3LQKQ/ CAUTION Removing power or the USB memory stick during the upgrade process will render the meter inoperable.

Both methods are described below:


Upgrade via Software Upgrade Option
  1. Download a new version from the list below
  2. Copy firmware to a USB Memory Stick. The file name should be image.xxxx.bin., where xxxx is the PN of the meter. i.e., 1836, 1837, etc.
  3. Remove USB dust cover plug
  4. Insert memory stick into the USB socket on back of the meter. Note: You made need an adapter dongle to interface between the memory stick and the meter (https://www.amazon.com/dp/B00LN3LQKQ/)
  5. Select Software Upgrade option
  6. Answer Yes to “Are you sure you want to update the Flash?”
  7. The red LED on the M2 will rapidly flash for about 10 seconds.
  8. If the upgrade was successful, a message with the new software version will be displayed.
  9. If there is an error then a message will be displayed (see error messages below)
  10. Remove USB memory stick
  11. Replace USB dust cover with “USB” text right side up

Upgrade via Forcing Meter into Upgrade Mode
  1. Download a new version from the list below
  2. Copy firmware to a USB Memory Stick. The file name should be image.xxxx.bin., where xxxx is the model number of the meter. i.e., 1836, 1837, etc.
  3. Turn off the power to the unit
  4. Remove USB dust cover plug
  5. Insert the memory stick into the USB socket on back of the unit. Note: You made need an adapter dongle to interface between the memory stick and the meter: (https://www.amazon.com/dp/B00LN3LQKQ/)
  6. While pressing and holding the leftmost and rightmost keys, turn the power to the meter ON
  7. The red LED on the M2 will rapidly flash for about 10 seconds.
  8. If the upgrade was successful, a message with the new software version will be displayed.
  9. If there is an error then a message will be displayed (see error message below)
  10. Remove USB memory stick
  11. Replace USB dust cover with USB label facing up

Upgrade Messages
  • Flash Successful / SW Version: xxx - Upgrade successful
  • File Not Found - A valid flash image was not found on the meter. The downloaded upgrade filename should be image.xxxx.bin, where xxxx is the model number of the meter. i.e., image.1836.bin, image.1837.bin, etc.
  • Corrupted File - The image is not valid or corrupted. Re-download the updated image from www.bluesea.com.
  • No USB Device - The USB memory card is not plugged in or the cable is defective.
  • Wrong Model Number - The image file is for a different meter. Download a new file from www.bluesea.com
  • Wrong HW Version - The new image file does not support this revision of hardware.


Select your product below to download the appropriate firmware:

1830 M2 DC SoC Monitor 1832 M2 DC Ammeter 1833 M2 DC Voltmeter 1834 M2 DC Multimeter 1836 M2 AC Ammeter 1837 M2 AC Voltmeter 1838 M2 AC Multimeter 1839 M2 Tank Monitor 1841 M2 Temperature Monitor


Revision Log:

Rev 9: 3/13/2018
  • 1830: Fix possible reset if using solar
  • 1830: More filtering for noisy inverter/chargers.
  • 1832: Zero shunt function for channel 2 fixed.
  • 1833: Minor fixes
  • 1834: Minor fixes
  • 1839: Auto Cal would not work if Sleep timer was off
  • AC Meters are unchanged


Rev 8: 6/27/2017
  • 1834 Only: Zero Shunt Function broken in Rev 5.
  • 1842: Initial software release
  • All other meters are at revision 6 & 7


Rev 7: 5/9/2017
  • 1839 Only: Updated default values for Rectangular and Triangle tanks.
  • 1839 Only: Fixed issue with meter dim timer.
  • All other meters are still at revision 6


Rev 6: 4/12/2017
  • All meters: Added alarm and relay delay functionality.
  • All meters: Sometimes an alarm that occurred while the screen was off would freeze the meter.
  • 1830: Added Firefly battery setting.
  • 1830: Added ability to turn off automatic SOC estimate based on voltage (solar could fool meter).
  • 1830: Added ability to set estimated temperature
  • 1830-1834: Certain noisy inverters would give false readings.
  • 1841: Initial software release
  • Other minor bugs


Rev 5: 7/19/16
  • All meters: Fixed issue with the Dim and Display timeouts that could cause the meter not to sleep.
  • All meters: Fixed issue with display not waking up after alarm condition
  • 1830, 1832: Fixed issue with some inverters that caused faulty current readings.
  • 1830: Added new SOC screen that estimates battery capacity (Beta). Displays Amp and Watt Hour Used.
  • 1839: Initial software release


Rev 4: 4/14/16
Note: 1830 & 1833 Meters calibration may be affected by this update. Only upgrade if needed.
The DC1 current channel by 0.005 A.
You may need to reset the zero offset value by using the DC1 Menu->Setup->Zero Shunt menu.
To zero out the shunt, connect both of the current sense wires to the negative bus bar side of the shunt.
  • 1830: Fixed Label in Relay Setup Menus
  • 1830, 1833: In certain situations, modifying the shunt value would not produce the expected results.
  • 1830: Resetting the meter using SoC defaults didn't reset all SoC values


Rev 3: 2/20/16
  • Fixed hysteresis issue with the Relay
  • Fixed erratic alarm blink on alarm notification page


Rev2: 9/24/15
  • 1830, 1833, & 1834 meters: If V1 is unconnected and the V1 alarm is off an alarm may sound anyway
  • Fixed issue with garbled Alarm and Relay Notification screens.


Rev 1: Release
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