Can anyone point me to a good starting guide to identifying a protocol between two micro-controllers?
The project I am trying to achieve is controlling a heater/pump unit of a Spa. The project has already been done but with an older model than mine - it had 4 wires between the display/buttons and the main controller (5v, GND, Rx, Tx) and used serial with a baud rate of 9600.
My model has 6 wires. I have identified 5v and ground. Two wires don't seem to do anything on the logic analyser or multi meter. I have included the logic analyser output below.... it does not seem to be 9600 serial....
Any ideas to where I should start?
Thanks for any pointers.
The project I am trying to achieve is controlling a heater/pump unit of a Spa. The project has already been done but with an older model than mine - it had 4 wires between the display/buttons and the main controller (5v, GND, Rx, Tx) and used serial with a baud rate of 9600.
My model has 6 wires. I have identified 5v and ground. Two wires don't seem to do anything on the logic analyser or multi meter. I have included the logic analyser output below.... it does not seem to be 9600 serial....
Any ideas to where I should start?
Thanks for any pointers.