 Hello everyone, and welcome to LuroVan with STM32 Getting Started series, part 7. I'm Srikanth, and in this video we will learn how to perform current measurements for different modes for STM32WL using LPM01A expansion board. Here are the tools we will be needing to perform the measurements. On the software side, we will be needing STM32 cube monitor power, STM32 cube WL firmware. On the hardware side, we will be needing STM32WL nuclear board, XNUCLEO LPM01A power shield, USB type B cables, and some jumper cables. Before we move on, let's educate ourselves with all the tools we will be using for this measurement purpose. The XNUCLEO LPM01A is a 1.8V to 3.3V programmable power supply. It performs static and real-time measurements up to 250mA respectively. As we mentioned earlier, STM32 cube monitor power is a software tool which enables the users to analyze the low-power performance of target boats, and in our case, STM32WL. You can download the software from ST's website. Now let's talk about the connections from our power shield to the microcontroller. The XNUCLEO LPM01A can power supply a target board using a basic connector CN14 for wire connection to any target. On the STM32WL side, we can use jumper JP1 to measure the microcontroller consumption by removing it. The connections should look something like this. We will also be needing two USB cables to power supply both the boards. For our measurements, we will be targeting the N-node application present in the applications directory in the cube WL firmware. Now in the N-node application, we can enable the low-power mode by setting the value of low-power disable in sys underscore conf.h file to 0. We can set the TX power to 0 dBm by choosing TX power 11 for default TX power. The reason we are choosing 0 dBm is due to the current limitation in LPM01A expansion board. In this video, we will be recording measurements for run mode and stop-to mode using STM32 cube monitor power and compare them with ideal power profiles from our data sheets. We will be monitoring the power profiles for STM32WL NUCLEO board using STM32 cube monitor power whenever it joins the network, transmits, opens per receive window and when it's in stop-to mode. Now the first step would be connecting the LPM01 power shield using a USB cable and opening the cube monitor power, selecting the COM port and clicking on taking control. Here we need to update the parameter values for sampling frequency to 20,000, current threshold to 50,000 and acquisition time to infinity. Once we set the parameters, we can click on start acquisition to take the current measurements. As you can see, the initial phase is when the N-node is trying to join the network. It starts to transmit some messages, the opens receive windows and in stop-to mode there is no activity at all. We can zoom in into the power consumption of stop-to mode in the power profile we recorded earlier and we can see here the average power consumption is around 2.4 microamperes which matches the numbers we mentioned earlier in the data sheet. You can check out other documents pertaining STM32 cube monitor power, nuclear expansion board and also the examples in the QWL firmware package under the examples section. Thanks for watching and don't forget to check out our other videos in this Getting Started series.