Hello About datagrams ST=20 and ST=26 (speed through water) First I present the results using ST=20 01 AF 01 box responds with $IIVHW,,T,,M,43.10,N,79.81,K*54 32ST responds with $VWVHW,,,,,43.1,N,,,*32 we note that the bytes AF 01 are read as 01 AF which converted to decimal give 431. We divide by 1...

Hello, About datagrams ST=10 (apparent wind angle) and ST=11 (apparent wind speed) In the multiplexer firmware 31 when ST=10 is received the angle extracted from the datagram is stored in a variable called AppWindAng. No Nmea0183 sentence is generated. When ST=11 is received a Nmea0183 sentence is g...

Hello, (if someone is following this article and has downloaded firmware "32ST" please download it again because I changed that just before writing this in order to redifine the evaluation of the checksum of the Nmea0183 sentences on the "32ST") About datagram ST=00 (depth below transducer) As befor...

Hello, I think I found the strategy for datagram 00 (Depth Below Transducer). Here is what we see in Thomas Knauf document 00 02 YZ XX XX Depth below transducer: XXXX/10 feet Flags in Y: Y&8 = 8: Anchor Alarm is active Y&4 = 4: Metric display units or Fathom display units if followed by command 65 Y...

Hello again, Now we can take some conclusions. Let us start with DBT (Depth Below Transducer) corresponding to datagram ST=00 02 40 39 74. $IIDBT,2975.3,f,251.74,M,495.88,F*26 this from the E85001 $SDDBT,2975.3,f,906.9,M,496.0,F*74 this from the "32ST" multiplexer The box uses II (Integrated Instrum...

Hello, Using the Nmea0183Tester tool we filled a file with instances of all the datagrams that the multiplexers are able to produce. The file is this one: ST=00 02 40 39 74 ST=10 01 00 F7 ST=11 01 0C 03 ST=20 01 00 41 ST=21 02 00 71 0F ST=22 02 87 1F 00 ST=23 01 0E 39 ST=25 04 CB 1D 3B 13 00 ST=26 0...

Hello, This is is the description of the SeaTalk1 generator that I am using. Note that it does not negotiates the bus. It just sends data without checking if any other talker has taking the bus. That is OK as I am only connecting it either to P4 alone or to the E85001 box alone. The schematics, a ph...

Hello, A revised SeaTalk1 tester is NMEA4WIFIV32ST.BIN . For each received datagram on port 4 it outupts 2 lines. The 1st line is the datagram itself. The second line can be one of the following: An Nmea 0183 sentence starting with character "$" which was converted from the received datagram. The te...

Hello, (see following posts that may contain more updated information) November, 3, 2020 - Starting with version 38 Nmea4Wifi multiplexer has a Debug function that shows the datagrams. It will be implemented in the Nmea2Wifi multiplexer at a later date If you download firmware version NMEA4WIFIV31ST...

Hello,

I will open a topic with title Testing and Grabbing SeaTalk1 Datagrams where I will discuss in more general terms some of the matters of the present topic.

Regards Luis