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RN-ISP-UM-1.1
APPENDIX B: USING THE RN-ISP TO MEASURE THE POWER PROFILE
You can use the RN-ISP to measure the power profile of the application that is running on the WiFly module. This tool is
very useful for plotting the current drawn by the module in different states, such as sleep, idle, and receiving and
transmitting data.
To use this tool, you must have licensed the SDK from Roving Networks and installed it on a Linux computer. When the
SDK is running on the development machine, follow these steps to start the power profile application:
1. Connect the RN_G2ISP to the development machine.
2. Connect the target board (RN-174 or RN-SDK) to the RN-ISP.
3. Open a command prompt on the development machine.
4. Go to the SDK/release/tools/dcom_interface directory.
5. Type python g2isp_gui.py <cr>. The power profile application launches as shown in Figure 11.
Figure 11. RN-ISP Power Profile Application
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6. Click Show Power Meter to obtain a detailed interface.
7. Set the threshold value to start capturing the power profile.
8. Press the board’s reset button to reload the application running on the WiFly module.
9. Press the board’s wake button to wake the WiFly module from sleep.
To capture the power profile on the RN-ISP, press Capture in the power profile application. Figure 12 shows an example
power profile.