Need help dont know what to start with.
turbo
Posts: 24
Ok im working with a automotive gauge cluster and the coolant gauge for the motor works with a one wire serial transfer setup from what i have heard from some people who have hacked the stock ECU the gauge works with a 8byte data stream the first byte is the coolant temp,the last byte is the check sum.
This is the range for the gauge
Redline =10
Middle = 30
low = 100
anything below 10 sets a redlight on the cluster
It works off a TTL RS signal at 7812.5 baud rate but it can be 7900 or so i think they have transfered data at 7911 successfully the sensor that feeds the signal is just a variable resistor to ground depending on the coolant temp.
I dont know how to even start with this do i use the serout command for transferring the data to the cluster? Do i need another add on IC to send the data to the cluster?
Im not to worried about the input i think i can figure that part out but the data going out depending on the resistance value coming in is where im stumped.
Any help would be greatly appreciated.
This is the range for the gauge
Redline =10
Middle = 30
low = 100
anything below 10 sets a redlight on the cluster
It works off a TTL RS signal at 7812.5 baud rate but it can be 7900 or so i think they have transfered data at 7911 successfully the sensor that feeds the signal is just a variable resistor to ground depending on the coolant temp.
I dont know how to even start with this do i use the serout command for transferring the data to the cluster? Do i need another add on IC to send the data to the cluster?
Im not to worried about the input i think i can figure that part out but the data going out depending on the resistance value coming in is where im stumped.
Any help would be greatly appreciated.