There are several ways to measure the energy consumption and resource usage on a Raspberry Pi 4.

Using the command line: You can use the command 'vcgencmd measure_clock arm' and 'vcgencmd measure_volts' to measure the clock speed and voltage of the processor, respectively. 'vcgencmd measure_temp' to measure the temperature of the CPU. 'free -h' to measure the amount of free and used memory.

Using a monitoring tool: You can use a tool like 'htop' or 'top' to monitor the resource usage of the system in real-time. These tools display information about the CPU usage, memory usage, and other system resources.

Using a power meter: You can use a USB power meter to measure the power consumption of the Raspberry Pi. This will give you an accurate measurement of the energy consumed by the device.

Using built-in Raspberry pi Power Monitoring: You can use the built-in power monitoring features in the Raspberry Pi to measure the power consumption of the device. This can be done via the /sys/class/power_supply/ directory.

Third-party software: You can use third-party software such as "RPi-Monitor" to monitor various statistics of your Raspberry Pi such as CPU usage, memory usage, network traffic and temperatures

Keep in mind that you will need to install additional software for some of the above methods.

Md. Sakibul Islam Sakib

thank you Md Sakibul Islam Sakib for your response, now i have an idea on how to do that. I think i will install a monitoring tool and tweak it a little bit to have energy measurement