This archive contains firmware update for Yacht Devices NMEA 2000 Bridge YDNB-07.
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###                 THIS UPDATE REQUIRES A SPECIAL CARE!                      ###
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###                SEQUENCE: 1.0x => 1.08 => 1.30 => 1.35                     ###
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1. Backup user program (insert MicroSD card to the Bridge, and then copy
   YDNBSAVE.CFG from the card to PC)
2. Copy BUPDATE.BIN to MicroSD card, insert the card to the Bridge and cycle
   the power of the CAN1 interface.
3. The Bridge will be updated, as it described in the chapter XI. "Firmware
   Updates" of the product manual, and produce 5 green flashes (this signal
   confirms that update is done).
4. DO NOT TURN OFF THE BRIDGE IMMIDEATELY AFTER THE UPDATE!
5. Check the color of 1-second LED signal after firmware update (or after
   powering of CAN1 interface of the Bridge), and open STEP2 folder:
   - in case of RED signal, rename BUPDATE_110.BIN to BUPDATE.BIN
   - in case of GREEN signal, use BUPDATE_130.BIN
6. Use new BUPDATE.BIN to update the Bridge one more time to version 1.10
   or version 1.30.
7. After update to 1.30 version, use file BUPDATE_135.BIN to perform
   update to 1.35 firmware version.

After the step 3, you can also check Bridge's firmware version on a chart plotter.
Firmware version will contains instruction what version to choose for the next
update, for example:

   1.08 06/04/2019, UPDATE TO 1.20

Or check the header of YDNBSAVE.CFG on the MicroSD card:

   # Current configuration of Yacht Devices NMEA 2000 Bridge
   # Firmware: 1.08 06/04/2019, UPDATE TO 1.20 

The firmware 1.30 (and 1.2x version) is designed for Bridges with a large
memory chip, used in production since 2018. This version is identical to
1.10, excluding the following features:

  - it allows to store bigger user programs;
  - it has password protection of user programs;
  - support trignometry functions.

The firmware 1.08 detects chip version and prepares Bridge for future update.
Reading of YDNB.CFG file from MicroSD card is disabled in 1.08 version. But
the Bridge will execute the program stored in the chip and will save it
to YDNBSAVE.CFG file.

Please note, that Bridge with 1.10 firmware cannot be updated to 1.30 version,
it is possible with 1.08 version only.

After 1.30, please, update the Bridge to 1.35 version to be able to update it
to 1.36 and later versions of the firmware.

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