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I'm trying to read the firmware version from a mppt 75/15 via Vi.direct (hex). I' was trying the 3 command "App version" but I don't know what the data bites are. With the get command 7 it's clear using the register i.e 0xEDEC for battery temp, but how is this done with comamnd 3?
Get: :7D5ED00[checksum]\n is working for charger voltage
how is the syntax for command 3? :300 [checksum]\n is not working
thanks in advance
Juergen
some addition information...
I'm sending this:
:300000052
and get this as response:
:AA9ED00C505EB
:AD5ED00C605BE
:13741DC
maybe this is the firmware version information. In fact my fw version is 1.37 but ":1" ist the done response but how to interpret the rest? is DC the checksum and 3741 in little endian means 4137? what is the 4 then?
