Elm327 Bluetooth Circuit Diagram. Another widely available option is bluetooth version 4 0ble but the ble bluetooth low energy part makes it less suited for this project. Vmeasure pin 2 this analog input is used to measure a 0 to 5v signal that is.
It supports obd ii protocols. It shows the circuit of anelm327 rs232 interface. The basic circuit is always the same whatever the connection mode rs232 usb or bluetooth.
In terms of the basic rundown on the general steps you can.
The next page shows an lmx9838 bluetooth module connected to an elm327 through the circuit of figure 2. Allow the device to scan for possible connections as you would for a normal bluetooth connection choose the scan tool elm327. Plug the bluetooth device into the obd ii port. It is best suited for use with a samsung galaxy smartphone or tablet paired with the free or paid version of torque.
