But if you wish to make your code platform independent, i.e. If you only work on linux/rpi systems, this doesn’t seem to concern you. So I recommend comparing chip ID instead of port ID. Even for FTDI chips that have only one port, such as for our case, the “A” is still there. The port IDs will be “NORTH A” and “NORTH B“. This is because some FTDI chips have two serial ports. The addition of the “A” indicates the port “A” on chip “NORTH”. On window, the port ID is returned, such as “NORTH A“. On linux, the chip ID is returned, such as “NORTH”. Now that you have this nice ID, let’s open port by this ID. Now that you have programmed your chip, you can read the information back using “scan” again to verify that the ID has changed: Once done, press flash icon (thunder bolt). You have up to 16 characters to name the adapter. Uncheck the “auto generate serial no” so you can edit the serial number to “NORTH”. Click on the “SerialNumber” from the left side. I can open port with this serial number but I’d rather change it to “NORTH”. So I have an FT232R chip with a chip serial number “A106DHE5”. If you have a device with FTDI chip, it will show up. If you are unsure whether your device has an FTDI chip, a quick scan using the program will tell you.įirst, press the scan icon (magnifying glass). I’ve not tested it in a virtual machine whose host is linux or macos. It’s windows only but I’m sure you can find a windows machine to run it. Here is a list of which devices are using FTDI’s chips that have the reprogrammable ID feature: The following steps will help you change the ID of the FTDI chip on your device so you can later open its port by that ID, instead of a port name. There is one field that can be called “NORTH”. Assume for the moment you are making a data logger for your test fields. We just have to find those IDs and possibly change them into more meaningful things for us to remember. Luckily FTDI chips already come with unique IDs. To prevent your program from opening the wrong port, you need a unique ID for each device. This means if you have more than one device on your raspberry pi, you may open the wrong port at times, which should be a big issue. This serial port designation is usually bound by the order that the device is discovered at boot time, which may not be the same even if you keep your adapter plugged into the same USB port. On raspberry pi, as on a typical linux system, your device shows up as a serial port, such as /dev/ttyUSB0. In this post, I will explain how to open serial port to your Arduino or SDI-12 USB adapter by its unique ID so you always open the correct port even when there are multiple such devices on your computer or raspberry pi.įor Arduino and SDI-12 USB adapter users, I have a nice trick to help you manage multiple Arduinos or SDI-12 USB adapters on the same computer or raspberry pi.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |