Esp32 current consumption with wifi

Users browsing this forum: Google [Bot] and 16 guests. Espressif Systems is a fabless semiconductor company providing cutting-edge low power WiFi SoCs and wireless solutions for wireless communications and Internet of Things applications. Skip to content. I have been looking at the Silicon Labs EFR32 series of BLE modules but hope to avoid the expense and learning curve required to utilize these devices.

I am working on a concept BLE device that runs on batteries. It is more than 10 times the power consumption of other BLE devices. I assume it is an error. I realize I am doing development and prototyping, and I can tolerate poor battery life with initial "proof of concept" devices. I could tolerate maybe 25 mA but the batteries required to supply mA would be totally impractical. Thanks in advance, Rob. That has shed some light on the problem. I think I need to experiment myself to get some real data.

In my case I am streaming a lot of data continuously, so it would be fine for me to have few tens of mA, as the device should run on a battery. I thought that the BLE itself should not sink so much current, so I guesses it was because Wifi and BLE share the same radio and so keeping the Wifi active would justify the high power consumption. Or am I wrong? I have tried to disable the wifi: include "WiFi.

Did you or someone else find a solution to this problem? So by using only BLE communication with low power consumption?

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Thank you very much to all the community for any feedback on the topic. I know other solutions exists like the one you suggested mebut it's not so intuitive to write a code as for the esp32 which offers the possibility for example to use also a simple IDE such as the Arduino one thanks to the existence of simple libraries.

Don't you agree on this point? I like the esp32, especially for its simplicity, so I just would like to understand if it's possible to transmit a stream of data only with BLE in low power or if it's impossible. So, is it possible or not? Thank you for everyone feedback on this topic. As you can see you need to setup a lot settings in menuconfig and i think if you compare it with sdkconfig from arduino-esp32 you will realize that required options are not enabled. That is now done, but I don't see much improvement.Espressif Systems is a fabless semiconductor company providing cutting-edge low power WiFi SoCs and wireless solutions for wireless communications and Internet of Things applications.

Skip to content. ESP32 Power consumption considerations. At first i thought that this could be due to one or two core usage but i read this post: viewtopic. Also, not sure whether modem sleep for Bluetooth is enabled yet.

I neglected it because i suppose that Antenna can be considered almost off in that time so that i can consider the current draw almost completely from CPU.

esp32 current consumption with wifi

The estimation is rough so i don't care mA of error. You were right for the datasheet. My bad for not noticing the updated version. By the way, so far so good.

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Ty for help WiFive. Actually there are not so many components on the board and i don't understand how the deep sleep on the esp32 could influence the consumption of the rest of the board. We have regulator, led, Serial interface CP and flash memory. This is harder to evaluate because of my ignorance.

With this consumption, if the flash memory is put in standby when the esp32 is in deep-sleep i could consider everything off except for the power led and the current of 3. By the way, during the normal mode i'm not able to evaluate the contribution of the flash memory on the overall consumption.

The only explicit command about the flash memory in my main. Any suggestion? While executing WiFi. After that module consumes average mA with 0. The spikes have duration of 0. Apparently it is about 2 times worse than promised in the ESP data sheet. I expected to see about 0. You do not have the required permissions to view the files attached to this post. Like one of these.

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With the ESP32 removed test the current draw of the board alone. Then pop the ESP32 in there and subtract the new reading from when it was removed. Jump to. Who is online Users browsing this forum: No registered users and 47 guests. All times are UTC Top. About Us Espressif Systems is a fabless semiconductor company providing cutting-edge low power WiFi SoCs and wireless solutions for wireless communications and Internet of Things applications.

Reduce the ESP32 Power Consumption in 3 Simple Steps

Espressif ESP Available now!If you want to create a project that runs on battery, you have to make sure that the power consumption of your ESP32 board is as low as possible to increase the lifespan of the battery.

In this tutorial I show you how to reduce the power consumption for a whole ESP32 based board up to If you are only interested in the results of the whole guidethe following table shows the final measurements for 6 different ESP32 based boards.

First of all it is important to know to measure the current consumption of each microcontroller. The following picture shows the wiring between all components. In my experiment I use my laboratory power supply that powers the ESP32 board with a constant voltage of 5V. The ESP32 boards have an input pin, that allows you to power the board with different voltage ranges that all support 5V.

This input pin is connected to the voltage outlet of the power bench. Next the ground GND pin of the ESP32 board is connected to the input of my multimeter that measures the current flow of the circuit. To close the circuit, the output of the multimeter is wired with the ground pole of the laboratory power supply.

esp32 current consumption with wifi

You only have to power the boards from the power bench and reset the board once. There are many different ESP32 boards on the market and some of them are already optimized for low power consumption. Therefore the first step is to make sure that you buy an ESP32 board that has a lower power consumption than the average board. The following table shows the six different ESP32 boards that I used for this tutorial with the build in microcontroller and the pins that are used for the current measurement.

The ESP32 boards have a different power consumption that we want to measure as reference. For the reference power measurements I uploaded an empty program on the microcontroller as well as the ESP32 example script that uses the board as WiFi scanner.

The current consumption of the WiPy 3. The reason for this is, the WiPy 3. It is important to know that the WiPy 3. If you are not familiar with MicroPython, you will need a lot of time to get the WiPy 3. Next we want to see how high is the current consumption when the microcontroller runs the WiFi scanner example script. But how is it possible that the power consumption differs between the ESP32 boards that are all based on the same microcontroller?

There are two main differences in the ESP32 boards. The first one is, the used voltage regulator and its efficiency. The objective of the voltage regulator on the ESP32 board is to provide a stable 3. Therefore the input voltage of the board is transformed and the energy resulting from the difference between the input voltage and the 3.

Also if the voltage regulator does not perform any work, the regulator consumes a quiescent current, also called standby current. The lower the quiescent current of the voltage regulator, the more efficient the ESP32 board is and the less power the board consumes. The dropout voltage is the difference between the output voltage and the input voltage at which the voltage regulator stops working.

In the case of the ESP32 boards, the input voltage has to be higher than 3. The lower the voltage dropout, the longer your ESP32 board operates while powered by a battery, because during the discharging of the battery, the battery voltage drops.

The following table shows the different ESP32 boards with the used voltage regulator, the maximum voltage dropout and the quiescent current. For the WiPy 3.When your IoT project is powered by a plug in the wall, you tend not to care too much about power consumption. But if you are going to power your project by batteries, every mA counts.

When ESP32 enters sleep mode, power is cut to any unneeded digital peripherals, while RAM receives just enough power to enable it to retain its data. The following illustration shows function block diagram of ESP32 chip.

It also contains WiFi module, Bluetooth Module, Cryptographic Accelerator a co-processor designed specifically to perform cryptographic operationsthe RTC module, and lot of peripherals. As per the power requirement, the chip can switch between different power modes. The modes are:. Each mode has its own distinct features and power saving capabilities. The normal mode is also known as Active Mode. In this mode all the features of the chip are active. As the active mode keeps everything especially the WiFi module, the Processing Cores and the Bluetooth module ON at all times, the chip requires more than mA current to operate.

Also we observed that if you use both WiFi and Bluetooth functions together, sometimes high power spikes appear biggest was mA. Obviously, this is the most inefficient mode and will drain the most current. So, if we want to conserve power we have to disable them by leveraging one of the other power modes when not in use. In modem sleep mode everything is active while only WiFi, Bluetooth and radio are disabled. The CPU is also operational and the clock is configurable. It is known as Association sleep pattern.

ESP32 can enter modem sleep mode only when it connects to the router in station mode. The sleep time is decided by the DTIM Beacon interval time of the router which is usually ms to ms.

Each frame contains all the information about the network. It is used to announce the presence of a wireless network and synchronize all the connected members. The working mode of light sleep is similar to that of modem sleep. The chip also follows association sleep pattern. It disables portions of the circuitry by powering off clock pulses, so that the flip-flops in them do not have to switch states. As switching states consumes power, when not being switched, the power consumption goes to zero.

This results in less power consumption than in modem sleep mode which is around 0. Before entering light sleep mode, ESP32 preserves its internal state and resumes operation upon exit from the sleep.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

I am currently working on a project using an ESP32 to monitor wifi packets using promiscuous mode. Currently, I am using arduino for ESP32 but can change to esp-idf if necessaryand am able to perform the monitoring correctly. I am looking to reduce this power consumption a bit.

How could I do so? Learn more. Asked 1 year, 6 months ago. Active 1 year, 6 months ago. Viewed times. Pre-calculating the multiply and divides as much as possible won't hurt. Active Oldest Votes. Sign up or log in Sign up using Google.

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Podcast The story behind Stack Overflow in Russian. Featured on Meta. Related 8. Hot Network Questions. Question feed. Stack Overflow works best with JavaScript enabled.Running an ESP32 on a battery is a tricky operation. The chip is a powerhouse, and with power comes great responsibility. Before we begin: the code samples shown in this post are for use with the Arduino framework. This was not tested with esp-idf directly.

Want to increase battery life? Then pick an ESP32 board that has a built-in battery connector.

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These boards likely use a much more efficient LDO voltage regulator. These boards have ME regulator that consumes just 40uA. Although these boards are discontinued, you can still find many alternatives online.

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Discontinued but many variant available. Still my favorite! The ESP32 needs an input voltage of around 3. A LiFePO4 would be perfect since it provides 3. I also tested some LIPO batteries with a voltage of 3. Yet the ESP32 has a dual-core processor. The difference between dual-core and single-core?

Power consumption of the ESP32 according to Espressif. Fewer cores consume less power. The same thing can be said for slower cores. If you can get away with a single-core ESP32, chances are you can get away with running that core at lower clock speeds. However, I found that this is not sufficient to keep energy consumption to a minimum. The regular WiFi. Many sensors have built-in power-saving features that you can trigger.

Insight Into ESP32 Sleep Modes & Their Power Consumption

So definitely check out the libraries you use to interface with them and check if they have this. No need for proprietary wireless signals and protocols. The only downside is that WiFi is pretty power-hungry, so you want to minimize the time spent with the radio on. I always add a timeout for setting up a WiFi connection.

I usually implement a second timeout. If no WiFi connection can be established in this time frame, the ESP32 goes back to deep sleep hoping WiFi is available when it wakes back up :. Finally, the biggest tip of them all: WiFi connections are super rough on battery life, so making fewer will improve battery life dramatically. Do you really need to know the temperature in real-time?GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. Unfortunately it is not explained that for deep-sleep with about uA mentioned current consumption you need to switch OFF WiFi befor e, if it was in use.

esp32 current consumption with wifi

If you do not do that the current consumption is about uA - about 10 time what has been told. All documentation I found to that topic did not tell about current consumption. Note: but it does not tell about "current consumption". Added to the Wiki with credits to you. Thank you for sharing your findings. I am now using ext1 sleep which works fine, but this seems like a framework bug. I am using version 1.

Best power saving mode - Much Deeper Deep Sleep ESP8266

Even after executing WiFi. Same here. I had to add an external Resistor as a pullup. This issue has been automatically marked as stale because it has not had recent activity.

It will be closed if no further activity occurs. Thank you for your contributions. I believe somehow when just use ext1 as wakeup source to sleep, ADC will be turnoff automatically when sleep, but if use ext0 as wakeup source, ADC don't get automatically turned off when enter deep sleep.

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