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Hi,

I have a Victron MPPT 150|35 SmartSolar charge controller and can successfully read the RS232 string in to a CR1000X datalogger via the CPI RS232 port.

I'm just wondering how best to parse the string, as the last character (Checksum value) changes regularly.

The string is 19 lines consisting of a Field Name and assocaited Field Value (field name and value are separated by a Tab).

Please see a complete string below captured via Putty. The string is output from the solar controller at 1Hz with no blank line after the Checksum.

Thanks very much for your help in advance!

Thanks,

Matt

PID	0xA058
FW	150
SER#	HQ19358CA84
V	12340
I	0
VPV	20
PPV	0
CS	0
MPPT	0
OR	0x00000001
ERR	0
LOAD	ON
H19	0
H20	0
H21	0
H22	0
H23	0
HSDS	0
Checksum	a

Have a look at the "SerialInRecord" instruction. This allows you to have a two character start word and separate two character end word, to find the string in-between.

So, your two character start word could be characters could be "PI" (PID sring) and end string word "um". As long as these sets of characters are not foundelsewhere in the outputs from the sensor, this should capture everythig between these characers in to a string variable. 

With a bit of experimentation and trial/error, you should get what you need.

Hi nsw,

Thanks veyr much for the information - most appreicated.

I'll try as you suggest.

Thanks again,

Matt

Hi Matt,

Did you manage to write a program to read/log the MPPT data. I am looking to write a program now and figured I'd reach out before commencing the trial and error phase.

Thanks,
Steve

I'm trying to achieve the same thing for a Victron MPPT 100/20.

I took the following code from the Campbel serial example, and have been trying to edit it to get the info that's broadcast from the MPPT using RX on C6.

Currently I'm not getting anything into RawString, what am I missing?

Public PTemp, Batt_volt
Public RawString As String * 130, SplitStrings(2) As String * 16, FloatValue, IntegerValue As Long
Public NBytesReturned

'Declare Private Variables
'Example:
'Dim Counter

'Define Data Tables
DataTable (Test,1,-1) 'Set table size to # of records, or -1 to autoallocate.
	DataInterval (0,15,Sec,10)
	Minimum (1,batt_volt,FP2,False,False)
	Sample (1,PTemp,FP2)
EndTable

'Define Subroutines
'Sub
	'EnterSub instructions here
'EndSub

'Main Program
BeginProg
 SerialOpen (ComC5,19200,0,0,50)
' SerialOpen (ComC3,19200,0,0,50)
 Scan (1,Sec,0,0)
 PanelTemp (PTemp,250)
 Battery (Batt_volt)
 'SerialIn (RawString,ComC5,100,"um",130)
 SerialInRecord (ComC5,RawString,"PI",0,"um",NBytesReturned,00)
 CallTable Test
 NextScan
 SlowSequence
 Scan (1,Sec,3,0)
 'SerialOut (Com2,CHR(2)&"1234E+04,1234,abcd"&CHR(13)&CHR(3),"",0,100)
 NextScan
EndProg

Thanks!

Lee