The new ESP32-S3 module - Extreme low power 1nA! ELPM-S3 by OBJEX

[Music] hi guys this is the LPM S3 is a red design of the esp32 S3 module to achieve extreme low power consumption in deep Sleep up to 1 nanoampere before introducing the project I want to show you the power consumption of this new module this is the power consumption of the lpms free in deep sleep mode when the external RTC is disabled as you can see with this jumper I generate an interrupt to the Circuit that controls the power supply of the esp32 and now with the RTC enabled the external RTC turn on the module every 1 minute and as you can see the LPM wakes up by itself I will now explain how I got this result but first this video is sponsored by PCB way you can buy your pcbs for only $5 check the link below to place your first order the LPM S3 was designed to solve one of the main constraints of the ESP 32 module the power consumption in deep Sleep I know there are my controllers with a very low deep slep stand by power consumption such as sat micro electronics and silicon Labs mic controllers but more and more smart devices are being develop with ESP foru the reason is very simple it easy to use and there is a very wide Community behind this platform so the esp32s free module is known for its limited power efficiency and this red design takes it to a whole new level by optimizing the power management circuit we have been able to reduce the power consumption of the module these Energy Efficiency improvements give the ESP 3s3 the ability to be used for whole battery power devices and energy harvesting applications with lpms free users can enjoy the benefits of the extreme low power consumption without sacrificing the performance of the esp32 S3 but does it really make sense to reduce power consumption so much during the Deep Sleep esp3 chs3 is not efficient enough to answer this question just compare the battery life of two equivalent smart devices based with the esp32 S3 and with LPM S3 to obtain this data I used my power profiler so as you can see the lpms fre is much more efficient I set either annual self discharge value because it depends a lot on the batter use and I made the same consideration with the safety margin and now let's take a look at the main features of the module as you can see from the block diagram the LPM can be powered in two ways the first by supplying 3.3 volt to the module in this way you directly power the esp3 chs3 and the RGB lead and the RTC the second way is to supply a voltage between three and 5 volt from the VIN input of the power Latch by providing power the power ledge waits for an interrupt to trigger and power the ESP F2 and to all components connected to the 3.3 volt the intera can be provided by these free input the first one is the master the second one is the gate for son then we have wake input and last but not least by the RTC to understand in depth how the different interupt mods work I suggest you to download the documentation you can find the link below in the description also in the module is a battery level circuit you can connect a battery in the v input this circuit has zero leakage current because it takes the reading or if the ESP Vu is powered so it's not connected directly to the battery it sounds like an obvious feature but trust me the most development boards as much product have the battery level circuit always connected to the battery since the circuit consists of a voltage divider you can well understand that this true resistor draws some microampere another feature is the status lead under the object's logo also the lead has zero leakage current so it has no effect on the Energy Efficiency of the module Manufacturing in the LPM as free would have been challenging without the support of PCB way which not only provided me the pcbs but also manufactur the aluminum [Music] Shields [Music] an important components of the module is the Emi Shield why is MI shielding important essentially to protect the module from external electromagnetic signals and to prevent signals generated by the module from interfering with surrounding components and why I choose aluminum for the shield so aluminum is non magnetic it does not interact with electronic devices that are sensitive to magnetic fields also is relative inexpensive making it an affordable solution for Emi shielding there are other metals and Alloys that are used for shield development but have either production cost for a small batch one of the most widely used Alloys is Mo metal one advantage of aluminum is much more resistant to external mechanical forces unlike other Alloys in addition aluminum is very easy to recycle the only limitation is that very complex to solder with tin and you need to use a specific flux I solved this problem with the inter rocking system before we start the test comparing esp32s fre and the lpms fre we needed to consider a few things first to test the ES3 2s3 I used the official dev kit but removing all those components that would be influence the measurement so I removed the ldo the Cal bridge and also the RGB lead because they are connected to the 3.3 volt but the RGB lead is present in the LPM because it does not influence the power consumption in deep Sleep from my point of view this optimization is very useful I have performed several tests on the LPM S3 the first test is a simple comparison of wake up by interrup of the lpms free and the ESP FR S free the differences are mainly the the power consumption in deep sleep which you already know and the startup time which is longer by a few millisecond in the lms3 module it's the right compromise to achieve very low power consumption it's possible to reduce the startup time of the esp32s free boot so it's possible to achieve a better [Music] result this test is similar to the first one only the wake up is automatic because it's controlled by [Music] RTC in this test I show how it's possible to program the RTC to wake up the module every 1 minute and at the same time it's possible to wake up the module by generating an interrupt in the master input in general with lpms free you can do any project you usually develop with the ESP Fu S free but with extreme Energy Efficiency since it's a first prototype I'm very satisfied of the final result in the description you can find the link to download the documentation of the lpms fre my goal is to M manufacture the LPM modules but first guys what do you think about lpms fre should I add some other features would you use them in your project and that's it guys I look forward to your feedback Below in the comments so guys thank you for watching the video Until the End and see you next time

Channel: Salvatore Raccardi

Views: 29,375

Keywords: objex, IoT, pcbway, esp32, ELPM, MCU, sensors, alexa

Id: bQRAcKUNwsc

Length: 10min 0sec (600 seconds)

Published: Wed Dec 13 2023