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hello, first things first, im not that good with code. :)I am gearing up to use this code and make some modifications to add mode 9 (send vin) and some ford specific pid's but im having a little trouble tracing what does what without any comments on how it works. would i add "9" to the SupportedPID set of numbers and change to SupportedPID(9)? can i also get a little more explanation on how those MILCleared numbers play in? and how //sensors interacts with //send sensor statuses ?when i send PID commands to my ECU manually, it sends back the PID headers stuff and then the value for that sensor with nothing after it. hence why im a little confused. Thanks, Brian
oh and i have the complete code that others hosted, not just code posted in this instructable. thanks. Brian
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I forgot to include the 10K resistor across the outer legs of the IRL520, Without it the transistor will erratically turn on and off.
hello, greetings from Chile.my question it`s about how many ohm`s the resistor must have?
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hi Garyjsplease helpe me i have similar project like you
hello sir;excuseme i have many question :1-it is Necessary that GND ardino with GND board is same?2--it is Necessary for test circuit ,obd connector connect ecu ? for example if i dont connect it to ecu ,it must work?3-please explain apart programming void loop?thanks
This is a good tutorial and I've even used it personally for reference while working on my own OBDII car display. I appreaite the effort to write this! Although, I went a slightly different route. A good alternative would be to get an HC-05 or similar Bluetooth module for the Arduino and a Bluetooth OBDII adapter. Both are very cheap on sites like Amazon or eBay. I'm talking less than $10 for a bluetooth OBD adapter and around the same for a HC-05. You may also need a logic level converter between the Arduino and bluetooth module like I did, since the Arduino is 5V and the module is 3.3V. The advantage of this method is that you don't have to rip an adapter apart and there's need to worry about running wires. Attempting to solder to a surface mount board can also be a very unpleasant experience and will likely be unreliable unless you are good at it.
Jerrycan mount with parts bought from a hardware store.
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