Hi,
I have a CR1000 on which I am trying to read data from a solar charge controller Tracer 3210AN from Epever. The solar charge controller uses a RS485 output that I connected to Com1 on the CR1000.
The Epever solar charger talks over Modbus RTU. The communication parameters are:
- The default controller ID number is "1";
- Serial communication parameters: baud rate 115200, data bits 8, stop bits 1, no data flow control;
- Register address uses hexadecimal format, the base address offset is 0x00.
- All 32 bit length data uses two 16 bit registers to represent (L and H respectively)
Basically, I am trying to use the ModbusMaster() function to try retrieve values from the Epever. I do not manage.
For example, on the Epever documentation they specify that to retrieve the Battery Voltage
I have tried the following:
ModbusMaster(ModbusResult,COM1,115200,1,4,Modbus(),1,1,3,100,2)
Maybe the starting Modbus Register/Coil I wrong,but I don't know which it could be the right one
Could anyone help please? Thank you!
Thanks
Tamara
CR1000 does not have RS485 serial drivers built in. A RS485 to RS232 adapter is necessary.
https://www.campbellsci.co.uk/forum?forum=1&l=thread&tid=17084
we're talking about it here too. I can send the EPEVER manual for the protocol, for anyone who knows something about it. Thank you
This post is under review.