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Serial Communications with OpenEVSE

Written By: Christopher Howell (and one other contributor)

Comments: 3
Favorites: 1
Completions: 4

Difficulty

Moderate

Steps

Time Required

Suggest a time??

Step 1 Hardware

OpenEVSE supports many Serial TTL Devices at 5v on the 6 pin header.

OpenEVSE supports many Serial TTL Devices at 5v on the 6 pin header.
The header is the common FTDI format.
Pin 1 - Ground (Black)
Pin 2 - No Connection
Pin 3 - 5v (Red)
Pin 4 - Recieve (Yellow) connects to transmit on the remote device.
Pin 5 - Transmit (Green) connects to recieve on the remote device.

Step 2 USB-TTL - Serial Console

Insert the serial to USB adapt or and install the appropriate driver

The windows driver for the adaptor sold in the OpenEV store is here: Windows Driver

Using a terminal console (PuTTY recommended) set the COMM port to the USB-TTL adapter and the baud rate to 115200. Then click Open.

Insert the serial to USB adapt or and install the appropriate driver
The windows driver for the adaptor sold in the OpenEV store is here: Windows Driver
Using a terminal console (PuTTY recommended) set the COMM port to the USB-TTL adapter and the baud rate to 115200. Then click Open.
If you do not know the comm port you can go into the Device manager and look under Ports.
In the console window enter $ and press enter. You should receive a $NK response.
Next enter $SE 1. This will turn on local echo so you can see what you send. The response should be $OK.
Now enter the command $GV. The responce should be $OK followed br the Firmware version and the Remote API version.