Using Damien's gs450h_v3_user code I can see three different Serial implementations inside of it
SerialDEBUG.begin(115200);
- this one uses a USB cable to serve up the Menu on our laptops and is used for us to troubleshoot
- I am tempted to try using this one with a USB to serial cable adapter to write to the LCD/I2C adapter or Nextion display
Serial1.begin(250000);
- this one appears to "//read mth" so something to do with Inverter control which is way over my head and probably not something to be messed with
Serial2.begin(19200); //setup serial 2 for wifi access
- this one talks to that little red card so that we can see some virtual gauges, is there a way to reassign those pins? or can I just wire to those pins
the red boad is an ESP8266 WiFi card that comes with the Lexus GS450h ver 2 VCU, despite it's 10 pin header/connector, only 4 pins are used (3.3v, Ground, Rx, and Tx)
This is a 1602 LCD (prints 16 characters across and 2 rows) in the back it has an I2C adapter to minimize the number of cables needed to connect to it, without the I2C adapter you would need like 16 cables to write to the thing.
This is the smallest 2.4" Nextion display
This is a USB to TTL adapter that maybe I can use as a man in the middle to get the output from the USB plug on the VCU and send it to either the LCD or the Nextion