Sunsynk 5kW inverter DB9 to CP2102

[Warlok]

I have this board laying around. Used it to program 2 way radios.

And this type of connector....

I have connected,  DB9 Pin2 (RD) to CP2102 TXD

                                DB9 Pin3 (TD) to CP2102 RXD

                                DB9 Pin5 (Ground) to CP2102 GND

Solar Assistant finds the CP2012 But gives a CRC error.

Should I connect the RTS and CTS pins?

And lastly, Where should the jumper be on the CP2102? 3.3v or 5v?

 

 

[Kalahari Meerkat]

2 hours ago, Warlok said:

And lastly, Where should the jumper be on the CP2102? 3.3v or 5v?

Since proper RS232 is +12 to -12V, this may not work... since this lot only operates at 9600baud, only TX, RX & GND should be good enough, but 1st confirm that this is TTL level RS232 and not proper, I'll let the smoke out of your CP2102 voltage level RS232.

Most people go with the RS485 connection inside the inverter instead with a RS485 to USB converter, similar to your CP2102...

[Warlok]

On 2024/09/24 at 2:24 PM, Kalahari Meerkat said:

Since proper RS232 is +12 to -12V, this may not work... since this lot only operates at 9600baud, only TX, RX & GND should be good enough, but 1st confirm that this is TTL level RS232 and not proper, I'll let the smoke out of your CP2102 voltage level RS232.

Most people go with the RS485 connection inside the inverter instead with a RS485 to USB converter, similar to your CP2102...

Thank you.

Scared of blowing things up, I ordered the RS232 to USB cable from the Solar-Assistant website. Plugged it in and works 99.9%. The other 0.1% is that it does not log inverter AC & DC temperature. Maybe someone has a fix?

Edited October 5 by Warlok
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