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+ +## Wired USB cable + +The simplest transfer method is to plug the RC device into a computer via USB cable. + +- It must be a 'data' cable, not 'charge-only'. + +- For Control Hub use the USB-C port, not the Mini USB port. + +- Connect the device for file transfer (Media Transfer Protocol or MTP mode). + + - on RC phone, swipe down twice to set MTP mode + +- Use the computer's file manager to locate the RC source folder. + +- Copy-and-paste the datalog or other file to the computer. + +- Unplug the USB cable; no need to 'Eject'. + +[
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+ +## Wireless adb - Set-up + +It's possible to connect the RC device wirelessly to a laptop (or desktop with Wi-Fi). The RC device must allow **USB debugging**, which can be turned on in Developer Options. + +- Control Hubs allow USB debugging by default. + +- For RC phones, follow these steps: + - open Settings and "About phone" + - tap 7 times on "Build number" + - now "Developer Options" will appear under Settings/System/(Advanced) + - turn on USB debugging + +- At first connection to a laptop, check the box to allow USB debugging from that computer. + +Also, the laptop must have **Android Debug Bridge** or "adb" installed. Installing adb is described many places online, and in the FTC Wiki at [this page](https://github.com/FIRST-Tech-Challenge/FtcRobotController/wiki/Managing-a-Control-Hub#connecting-to-the-control-hub-using-wireless-adb). + +[
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+ +## Wireless adb - Command Prompt + +After completing the above adb set-up steps, click the laptop's Windows 10 or Windows 7 icon at bottom left corner. In its search bar, type `cmd` to open the Windows **Command Prompt** window. + +To verify that adb is already installed, type `adb devices`. An error message will appear if adb is not installed; otherwise a list of devices may appear (OK if blank, for now). + +To connect a **Control Hub**, type `adb connect 192.168.43.1:5555` at the command prompt, and wait for acknowledgement. + +Connecting an **RC phone** via adb can be done in two ways: with Wi-Fi Direct, or with standard Wi-Fi. + +- For both methods, plug RC phone into laptop with USB cable + - optional to set file transfer (MTP) mode + - if a pop-up appears, check the box to allow USB Debugging + - at the command prompt, type `adb tcpip 5555` + - wait for message "restarting in TCP mode port: 5555" + - optional to confirm wired connection with `adb devices` + - unplug the USB cable + +- **Wi-Fi Direct method:** + - open the FTC RC app + - connect the laptop's Wi-Fi to the RC phone's network, as usual for Blocks/OnBot Java programming + - at the command prompt, type `adb connect 192.168.49.1:5555` + - receive confirmation + +- **Standard Wi-Fi method:** + - confirm laptop and phone on the same standard Wi-Fi network + - Airplane Mode off + - get (from Settings) the phone's IP address (e.g. 192.168.1.15) + - type `adb connect 192.168.1.15:5555`, using the phone's actual IP address + - receive confirmation + +- For both methods, optional to confirm wireless connection with `adb devices`. + +[
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+ +## Wireless adb - File Transfer + +With adb in place, copying a file from the connected device to your laptop can be done with a single "pull" command. For example: + +`adb pull /sdcard/FIRST/Datalogs/myDatalog_001.csv C:\Users\Public\Documents` + +The 'source' field is the **filename** on the RC device. The 'target' field is the desired destination **folder** on your laptop. + +And yes, it is really that easy. (There's also a "push" command.) + +Some notes: + +- Uppercase/lowercase is optional, but pay attention to forward- and back-slashes. + +- Files with the same name will be overwritten in the target folder. Rename files as needed to avoid this. + +- If a folder or file name contains a space (blank character), enclose the entire pathname in double-quotes. For example, "C:\Users\Public\My Documents". + +[
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+ +## Wireless transfer with Android Studio + +You could transfer files with Android Studio, used here for its **file manager**, not for programming. + +These steps are not as fast as "adb pull", but the file manager allows you to see and navigate the source and target folders. + +- connect via adb to the Control Hub or RC phone + +- open Android Studio (any project) + +- click ["Device Explorer"](https://raw.githubusercontent.com/wiki/WestsideRobotics/FTC-Datalogging/images/AS-01-marked.png) at right edge + +- in Device Explorer, navigate to the device folder [FIRST/Datalogs](https://raw.githubusercontent.com/wiki/WestsideRobotics/FTC-Datalogging/images/AS-02-marked.png) + +- right-click the filename, choose ["Save As..."](https://raw.githubusercontent.com/wiki/WestsideRobotics/FTC-Datalogging/images/AS-03-marked.png) + +- at the next window, navigate to the [laptop target folder](https://raw.githubusercontent.com/wiki/WestsideRobotics/FTC-Datalogging/images/AS-04-marked.png), click OK + +This [copies the file](https://raw.githubusercontent.com/wiki/WestsideRobotics/FTC-Datalogging/images/AS-05-marked.png) to the laptop target folder, confirmed with [Windows Explorer](https://raw.githubusercontent.com/wiki/WestsideRobotics/FTC-Datalogging/images/AS-06-marked.png). + +To **refresh** the directory listing, re-select the RC device from the top pull-down menu, just below the heading "Device File Explorer". + +[
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+ +## Summary + +This basic tutorial showed some ways to transfer datalog or other files from the FTC Robot Controller (Control Hub or RC phone) to a desktop or laptop computer. + +This article did **not** cover: + +- portable USB flash drives (thumb drives) + +- direct download with connected software such as FTC Blocks or OnBot Java + +- methods that require installing third-party apps to the RC device, and in some cases also installing software to the laptop. Some examples are described [here](https://geeknizer.com/transfer-files-between-pc-and-android/) and [here](https://appuals.com/5-methods-to-wirelessly-transfer-files-from-android-to-pc-no-usb/). + +You are encouraged to submit and describe other file transfer methods that worked for you. + +[
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+ +------ + +This article is **Part 3** of a 4-part series on Datalogging. + +[**Part 1**](https://github.com/FIRST-Tech-Challenge/FtcRobotController/wiki/Datalogging) shows how to run a **sample OpMode** and chart its data. + +[**Part 2**](https://github.com/FIRST-Tech-Challenge/FtcRobotController/wiki/Datalogging,-Part-2:-Custom-Data) shows how to **customize** the sample OpMode for logging your own robot data of interest. + +[**Part 4**](https://github.com/FIRST-Tech-Challenge/FtcRobotController/wiki/Datalogging,-Part-4:-Java-Learning-Exercise) describes the inner workings of a **different**, much simpler Datalogging class. It's strictly a Java learning exercise, showing basic steps to log robot data on the RC device. It does not require familiarity with Parts 1 and 2. + +*** + +Questions, comments and corrections to westsiderobotics@verizon.net +