Let’s Talk IoT Devices: Walter (ESP32-S3 with NB-IoT/LTE-M/GNSS)

Good morning, and good afternoon, everyone. Welcome to the Let’s talk IoT devices webinar series. Today, we are going to focus on Walter, which is a new ESP32-S3 board. Let’s talk about who we are, and today’s special guest is Don, Don, Popp, papa, who is the actual creative mind behind the Walter board as well as DP Technics. Done, do you mind saying a few words about yourself? Of course, at first, thank you for having me here. So I am the founder of DP Technics and IoT Development company. And my specialty is actually designing the hardware and embedded software design. And together with my team, we create IoT applications in various sectors and also building blocks for the IoT where Walter is one of them. Great. I’m very, very happy to have you here today. And my name is Dora. I am a device product manager working at Soracom. I’ve been working with the IoT and connectivity for over ten years, and I’m really looking forward to to driving this session with you today, Daan. Let’s look at what we have on the agenda. We’re gonna talk a little bit about ESP thirty two s three processors and microcontroller ports, then we are going to deep dive into Walter and its specifications. We are also gonna look at some practical use cases. Let’s look at ESP32-S3 itself because a lot of people know that it’s a low cost, low power microcontroller board, but very few people might remember that adding for instance Wi Fi to an IoT project used to be a very, very costly part whenever you build an IoT product. So when we bring you down a little bit on memory lane, when Espressif Systems came out with the first ESP board back around two thousand fourteen. Those boards cost only three dollars. So they revolutionized the IoT market. ESP thirty two itself is, a very energy efficient board that is capable of handling and working in quite rugged environment. And I think many of us remember Pycom and its rise as well as its fall. And I think, Daan, you have seen an actual gapave seen an actual gap when Pycom disappeared during last year. Can you tell us a little bit about your drivers for creating Walter? Yes. Exactly. So as an IoT development company, we have been creating projects mainly remote sensing projects based on cellular IoT, were also the Wi Fi and Bluetooth component to read out local sensors was very important. So, therefore, we needed a board that had both these local radio technologies, WiFi, and Bluetooth, and the cellular technologies, like LTE, and narrowband IoT. And at the time, the Python board was one of the only small form factor modules that had all of these capabilities into a single board and it was also certified so that we could use it for commercial use. And having made these projects and deployed them successfully, it was, disappointing to see that Pycom went away, but on the other hand, it was an opportunity because that’s how the idea to create Walter was was born. And we actually took on the challenge to create Walter as an updated version of the Pycom g GPy, but, with still compatibility, both hardware compatibility as well as and also software compatibility. And that is actually how the idea to develop Walter started. And this is a perfect bridge over to our next slide where we actually look at what Walter is consisting of. So you mentioned that it has a Wi Fi as well as a ble support What type of module did you bring in and and why? Mhmm. So the original Python had an ESP thirty two But in our upgraded version, we use the ESP thirty two s three. And it’s actually a very, very capable Wi Fi and Bluetooth system on chip that has a very powerful processor, but on the other hand, also focuses on low power. So it has a low power RISC-V processor. It has a lot of security options inside So it’s actually the ideal choice to to run it as the main processor of the Walter board. Great. In terms of a cellular capability, what type of cellular modem did you build in? Again, here we looked at what was in the Pycom, and they used, Sequans modem. And Sequans is actually a European vendor. They are based in Paris, and they make their own chipset. And that is what is really important for us that we use this European chipset and that the actual modem maker is also the designer of the chipset in the module. And besides that, Sequans is already an established player in the field, And their software stack on the modem integrates a lot of protocols, not only the basic ones such as MQTT or HTTP, but also more advanced protocols such as co op or lightweight end tool. So that made us choose the Sequans chips. And also very important for former Pycom users is that although it is the newer version of the original Pycom chipset. It’s the monarch two. It is still compatible. So the AT commands are exactly the same. And it’s capable of handling LTE-M and NB-IoT IoT as well. Yes. Yes. Exactly. So Both these access technologies are present. They are also, narrowband IoT version two. So it’s, and it’s upgradeable to even release seventeen, which is remarkable, and also, not to miss upgrade, in regards to the original Python is that we have a GNSS capability inside of the modem. Chip. Very, very good. When you think about, customers and, target buyers, Do you have mainly builders and hobbyists in mind, or are you also thinking about R and D engineers working on on on different volumes and different projects? Actually, both are possible. So you can use Walter to make a proof of concepts of your product or ID, but what we see in the cellular IoT market is that there are many companies that work in low to medium volume products. I’m thinking, volumes between one thousand and ten thousand pieces a year. And there, these volumes are not enough to make a custom cellular solution because you have, of course, these certification costs you have the antenna tuning costs. So in this kind of medium volumes, you need a good certified module that has a longevity guarantee. And that is a problem that we also strive to solve with Walter. We both have been, working on certifying the module and also, working with the suppliers, Espressif, and Sequans, and other component suppliers to guarantee an availability of ten years. That’s really, really important in IoT that you can rely on a component your product to be available for a longer time because these kind of IoT applications are in the market, not for two or three years, like a cellular handset or something, but they are deployed for ten to fifteen years. Indeed, they see more and more, especially low power wide area use cases exceeding five or even ten years, as you say. Brilliant. Let’s look at the different benefits of Walter on the next slide. And some of it, we have already touched on, like, open source. Pycom used to be a closed source product. Right? Yes. Exactly. Being open source is really important for us. And maybe we’ll zoom in on that now. We’re a bit later, but it is really important that we mentioned open source. And I think it makes the different engineers very, very enthusiastic about Walter as well. C and FCC certification, you mentioned just before the the importance of certification and also the related costs. When you think about the the geography that Walter is going to target, especially initially, what do you have in mind? Well, currently, the hardware is capable to be deployed worldwide. But, of course, you need to have the right certifications. And to start with, we are certifying Walter for use, in Europe with CE certification, in the US with FCC certification and also, New Zealand and Australia through SDOC certification. But, of course, as we are progressing in in this project, and customers have questions to use Walter in another part, of the world. We are really open to that, and the certification methodology that we are using allows us to certify for other parts of the world really easy. So it’s also based on market demand, to see if we are going to certify, for example, IC in Canada or for, the Asia or Africa region. Very, very good to that you are open depending on on where the actual demand will come from. Mhmm. Flexibility and I/O pins, I think we can talk about it, on the next look, two slides where we’re gonna deep dive in the actual physical features. Multiple languages. You already mentioned the support for Arduino ID, MicroPython, and JavaScript, and also as per as per se. We talked about the different connectivity support. And you are very, very proud that the actual manufacturing and design is both done within Belgium. Yes. Yes. We are very proud of that. And it’s really, nice for you to highlight that because we see in the IoT world that given the political situation that it is an important, plus for us to, be able to manufacture in, in Europe. And also the cellular chipset is coming, from a European vendor, and it’s all designed and built here in Belgium. And last but not least, we need to talk about the very small form factor that Walter has. The actual size is fifty five millimeter by about twenty five millimeter when when it comes to the module. Which is very impressive, and I think it opens up a lot of doors to different projects requiring such small form factors. Yeah. Thank you. Okay. This is, the first slide about the different features and, specifications. When we looked at the initial slide about ESP thirty two s three, we have seen that there is a dual core CPU inside, and we touched on, Sequans Monarch version two. I think what’s really good to to maybe ask here or mention here is the actual power consumption. We all know how important power efficiency is, especially for for any type of of low power wide area use case. So how is the power consumption comparing of Walter when we take, for instance, the Pycom device. Mhmm. Mhmm. Well, actually, both the monarch two chipset and the ESP thirty two s three chipset are upgrades from the original Picom. And when looking at power consumption, of course, the time that is active is important, but it’s even more important to look at what the device is consuming when it is in sleep mode. And then we have, focused on getting this sleep current as low as possible And currently, we are hitting value of twenty five, micro amps when in PSM or eDRX mode, and it’s not transmitting. But actually we have invested in, special equipment like the Joulescope to bring exact measurements to the documentation of Walter. Because, as a software developer, you need to zoom in on this power consumption and that’s also, one of the very important things about why we work with Soracom as, PSM and EDRx are so important in this cellular technology. And you need to have good control also from the operator side to get your power consumption as low possible. How do you handle power hungry applications? Well, on Walter, there is also a three point three volt output. This was also present on the original Pycom but it was not software controllable. So the three point three volts to peripheral devices was always present. In Walter, we have made this three point three volt output, Mosfet switchable. So you can control it from software. So that allows you when you have peripherals such as industrial sensors that consume quite a lot of of power when they are doing actual measurements. And, as they are designed to be connected to, for example, the PLC and don’t have a sleep mode, you can still use them by just turning off the power from software. And this is a real, yeah, game changer, such a simple thing, but it a game changer in comparison to the original Python. I totally agree with you, and this is also going to attract, I think, a lot of exciting use cases. Definitely. We haven’t talked yet about, the GNSS, especially about the the GPS availability on Walter. So, there is an integrated, GNSS, GNSS And, I wonder what is the recommended, tracking interval when we talk about tracker use cases that, you would recommend to to any of the audience if they are about to to to build anything that is tracker related with Walter Yes. So the GNSS is actually sharing the radio with the LTE connection. So it’s a single radio that does the LTE and the GNSS. So you cannot use them concurrently. This lowers the price of the chipset, but also lowers, the power consumption. So it’s actually you can use GNSS when you are in PSM mode or when you are not attached to the cellular network. And this makes Walter ideal to do, like, asset tracking or even tracking a vehicle or a cargo container or just just to know where your sensor is deployed. So to speak, it is not so, advisable to use it to do, like, high speed tracking. It’s not a continuous tracking device. You need to take into account that it takes about thirty to sixty seconds to get a fix. But it definitely helps when you have an LTE connection available, then the technology inside the modem is using assisted, GNSS. So it actually downloads all assistance data from the cloud and then uses that data to really shorten the time that the radio needs to listen, and that means lowering the power consumption. And that’s also why we have integrated the LNA. So the low noise amplifier, on the Walter, and that’s, when you see here the the antenna is really a passive antenna. There is no active antenna, and that allows us to, get the power consumption when receiving is only seven milliamps. So really, really, really low. And it it’s it’s about lowering the power consumption of GNSS reception, but also lowering the, refresh rate of of the tracking solution. Very, very impressive. Thank you. Let’s move on. And, this is one of my favorite slides within this because it really shows the potential, possibilities that you can do with Walter. Namely because of its twenty-eight physical pins. Can you tell us a little bit more about what you can do with these different I/O pins. Definitely. And it’s also one of my favorites things about upgrading to the ESP thirty two s three. The multiplexing inside this microcontroller is really giving you all the flexibility you want because you can actually get any peripheral being it I squared c SPI, UART, CAN bus, I²S, you name it. There are a lot of, peripherals in the ESP thirty two, and they can be multiplexed to any pin on Walter. So that allows you to have this backwards compatible compatibility with the original Pycom but it also allows you to really optimize, the routing of the carrier board that you are going to place Walter in. Yeah. Great that you also mentioned the the the pin and footprint compatibility with Pycom. Mhmm. The sky is the limit. Yes. Yes. Exactly. And and so that’s the nice thing about IoT. It’s it’s your imagination and it definitely with this module, you can, there are going to be use cases that we cannot even imagine today. Brilliant. We have already discussed how important it is to have an open source device, and we touched on some of the supported software. Would you like to tell us a little bit more about what made you decide to to keep Walter open source? And what will the future bring on top of the supported software? Mhmm. Yeah. That’s also, again, in comparison with the closed source Pycom solution, that’s actually in our opinion, a limitation of the system. Also when thinking that IoT applications are deployed for ten to fifteen years, it is important for you as a developer or as a company to be able to take the software development in your own hands. And open source allows you to actually do this. So the schematics of Walter are completely open source so that you can deep dive in how the product works and optimize every single bit inside of the software. And on the other hand, our development team can write libraries, and we do support many, software tool chains, like the Espressif IDF, like arduino, like MicroPython, but also in the future Toit is going to be used, and they actually already made a library. And that kind of cooperation and working together between us as a hardware provider and software companies that make these great languages such as Toit, that really shows the power of being open source, and you can just not achieve that by remaining closed source. I fully agree with you, and this is what’s going to make Walter in my opinion into one of the next generation developer boards. By now, we understand that, Walter exists as a standalone solution, but I I also know that, you thought about, an additional device that can add some additional peripherals as an extension board. Can you tell us a little bit more about Walter Fields? Yes. Definitely, Dora. I can. So I have Walter Fields here with me. So, as you said, Walter can be used standalone, but of course as you are developing an application, you will want to create a carrier board, which can do your power management, which allows you to have better connections, with with other sensors and to get you as a developer started right away, that’s why we designed Walter Fields. It’s actually a showcase of all possibilities that Walter can control. And we have integrated, quite an extensive power management which can accept renewable energy sources such as wind energy or solar energy from small panels that only send out three volts up to larger panels that send out thirty six volt, and you can also connect a battery there are multiple chemistries that are supported from, lithium iron phosphate to lithium iron to lead batteries, and single cell or multiple cells, and that’s really important because many IoT applications are only going to use a single cell to lower BNS costs. And on the other hand, we have integrated various sensors on Walter Fields temperature, humidity, barometric pressure, but also a gyroscope, and even, a possibility to install an absolute CO₂ sensor for air quality monitoring. But, of course, there are also a lot of more ruggedized and industrial sensors that you want to connect to. And therefore, we have on Walter fields, RS four eighty five. RS-232 and a CAN bus, CAN bus. So it’s all on this board, and we also thought about storage. You can add an SD card, on the board. So Right. Probably for many applications, it’s too much, but it allows you to click Walter on it, develop your application, do some proof of concepts with customers and take this also open-source design. Start with it, throw away what you don’t need, and it really kickstarts the development of your IoT product. Indeed. Yeah. Yet again, the sky is the limit. For your imagination with Walter Fields too? Yes. Yes. Exactly. And and Walter Fields allows you to be creative without the need to design a hardware first. So you can do a software first approach and optimize the hardware later. And I really love how you bring in the the sustainability and also the, alternative energy source aspects. So well done, Daan. Thank you. In the next section, we are going to jump into three different target applications or use cases where Walter has been already physically tested by different beta testers. The first one is going to cover the tracker use case that we also previously mentioned Can you tell us about the board that you can actually see on this picture? Yes. Definitely. So, Tracker is the easiest use case to do with Walter because you don’t even need, a carrier board. And all the beta testers all over the world when they put up Walter for the first time and it appeared on the demonstration platform. And the use case that we see on the picture here, was a really fun one, because one of our beta testers has installed a few Walters on small fishing boats in Cyprus. And, they’re the the fisheries needed a solution to to track the boats on an easy, an easy way and without the need to install large antennas, onto the vessels. And that’s where also LTE-M and NB-IoT IoT, come to play because, they can have tracking in the area that they are on the sea, even when cell phone is out of range. So normal cat one or cat four is out of range, with just the the the Taoglas antenna that comes with Walter. So and, the the boats that you see here in the picture are actually the ones that were first installed with a Walter demo case. Really, really cool. And I’m especially proud because it’s, Soracom SIM cards. That are powered that have been powering, this use case Yes. Out of the Mediterranean Sea. Great. Thank you for that summary. The next one is going to be also bringing us to to the sea, but, more of a weather station. A remote weather station. And this is where a Walter Fields has been also put in practice. Right? Yes. Exactly. So Here, there was a customer that needed to do, an installation and, with industrial sensors that these were sensors that are installed underwater and they monitor various water parameters, such as conductivity, water temperature, salinity, turbidity, and these sensors, talk through a Modbus connection. So Here, immediately, Walter Fields, was an exact match, for this problem as we could connect these modbus sensors directly to the RS four eighty five port, of Walter Fields, and Walter Fields itself was installed in a a watertight cabinet, in the in the in the measuring station. And also here it was again nice to see that when they installed this, proof of concept, again, there was no cell phone range. So they could not even make a phone call to to to do support, but Walter connected right away, and we even have good signal strength, on the measuring pole. Fantastic. Yeah. Using LTE-M, we actually sent out fifty measuring values, every five minutes. So LTE-M was the, it was a very good solution because we can have near real time data coming from the pool. And you mentioned that, you needed to apply a watertight box. But we also know that you have done this at the North Sea, and we know how rugged the condition there can be. Yeah. So it’s in a in a in a metal case with an external antenna there. But it’s like a small pack antenna. So this also was a good test for us because it showed that Walter can be used with various LTE antennas. Really cool. And the third and last use case we’re gonna look at is about tank level sensors. And I think this is also where we are going to prove that LTE-M is a very powerful, connectivity option, especially when it comes to to down, deep down in the earth’s connectivity. Yes. Exactly. Here, there was a customer that actually had some kind of, monitoring solution with an older, first version narrowband IoT only chipset. And they actually came to us and said we want to monitor the level of diesel tanks, like, domestic diesel tanks for domestic heating, but their success rate of getting connectivity, under a metal cover or two stories below ground. Was really low, like only sixty to sixty five percent. So we said we looked at the design and We saw some issues with the antenna design, and we say, okay, we are going to redo these tests using Walter and with the Taoglas antennas that that come with the Walter development kit. And, we have tested the sensor at about two hundred locations in Belgium, outside in metal cabinets and a thick metal metal lid, underground, two stories underground and, like, concrete buildings, And we actually went up from only sixty percent success rate to ninety eight percent success rate. So, that’s impressive. Yes. So there you see that, we do see there, and it’s expected that narrowband IoT is the winner here. It’s a stationary application, and it has just this tiny bit of extra power that, made this test successful. Again, with the Soracom SIM cards, of course, which support both narrowband IoT and LTE-M. Thank you. Really really cool three use cases. And as we said, we can most probably see very, very new and cool stuff popping up in the near future. Definitely. Shall shall we look at that future and what’s in store for Walter, actually, you are about to launch on the crowd supply website. Right? Yes. Yes. And that’s really exciting for us. Of course, with this new module, it’s all about spreading the word and, showing it to everybody who’s interested that Walter is is here to come. And, as we are an open source module, we are very proud that we were accepted by crowd supply. Which is a Mauser subsidiary, to be crowdfunding Walter, through this platform. Actually, we are already working on the certifications. So nevertheless, the outcome of crowd supply Walter is here to stay as we are already a lot of, interested people, and we are already hearing the first commercial projects with with Walter that are are, in the pipeline. But, launching on the crowd supply, is definitely part of our strategy to telling everybody about Walter, and also it confirms that we are open source because only open source projects are accepted on Crowd Supply. Congrats on being accepted. Thank you. When when is it planned to actually go live? Do you have any any estimate, any timeline estimate? Mhmm. We should go live at mid December. That’s the planning. So we are currently finishing up, certification in California with the CE and FCC. So that’s going full steam ahead, and we are now preparing, the crowdfunding campaign, like, making the information movie and so on and so on. So on the planning now is to have it live somewhere mid December just before Christmas. So it’s an ideal Christmas present for any developer, I think. Indeed. Indeed. And for the time being, you already have some of the commercial packages available and there are a few test units that, can be already shared with some developers. Can you tell us what’s the difference between these three preliminary packages. Mhmm. Yes. Definitely. So the bare package is it’s important here. We really, really did our best to keep the price low because Of course, you can have, like, cellular modems that cost hundreds of hundreds of euros, but that makes many use cases not commercially viable. So the first bare Walter package is it’s just Walter without any antennas. You can use it’s, like, a UFL connector. So you are free to use, any antenna that you want. Of course, taking in regards to game factor and so on. But this is the bare Walter board that you can use on on the carrier. And then we have, being, ten years or guaranteeing ten years of delivery also meant that we needed an antenna prior that could guarantee us an availability of the antennas for ten years. And that’s why we chose, Taoglas as the recommended antennas for Walter. They are compact. They can easily integrate in a housing because they are just stick on, and that is what the connected package, means that you get Walter together with the antennas. And then we have the developer package, and that’s really meant for people who want to kick off an IoT development project with Walter. So you get Walter, you get the antennas, and you get, a Soracom SIM card included, and a prepaid amount. So it’s really the kit that you want, you just plug it in and start developing. And it’s also important to mention that within the the developer package, there is, support included from our engineering team. So when you have a question during development or you want advice on how to design something on the hardware, then it’s included in the developer package. So that’s really the way you want to go when you want to, start working on your, commercial IoT product. And that one to one call can can really mean a big difference, I believe. Yes. In in the success of the commercial package. Especially considering your experience guys with different IoT applications. Mhmm. Yes. Yes. Exactly. Very nice. Here we actually gathered all the different information about Walter. There is a dedicated, product page at quickspot.io, there is a version four data sheet available because Walter went through quite some improvement in the past year. You have a dedicated GitHub. And in case someone is interested in creating, their own case for for Walter, they can take a look at the 3D print that your team has put together as an inspiration. Yeah. Exactly. It’s a small case that you can use. Put Walter as a standalone tracker inside. So, it’s just fun fun to print. And also, I want to say exactly we are on GitHub. So we do welcome, any input, like, create an issue if you have a question or if you want to do a pull request, it’s actually, a work in progress, and we really are open for input from others to improve our libraries, on the GitHub page. It’s something that we think is also very important as also in the software, we have, taken a lot of time to optimize it, but, of course, with software, it can always be improved. The power of open source. Right? Exactly. Really cool. And, towards the end, we actually left two different slides. One is to give a brief overview of DP Technics. So if you don’t mind saying a few words about your company done, Definitely. So DP Technics is established in two thousand seventeen, and we are an IOT development company. And that means that for our customers, we work from an idea on paper up to a finished product and also the whole road behind that. That’s in many cases. It’s forgotten, but actually the development is twenty to twenty five percent of your IoT trajectory, and the maintenance software updates, and so on is seventy five percent after. And to make IoT available for small companies and SMEs. We also develop, what we call IoT building blocks. And Walter is one of the building blocks, but we also have a Linux system on module, and we also have the blue cherry dot I o IoT platform. Which is a completely in house, developed platform that we supply to customers if they want to connect devices. And yes, that’s actually what we do: engineering, and we have expertise in many fields. That’s one of the most fun things about running this company is that we learn, we are in smart lighting, HVAC, marine industry, agriculture, automotive. So we can bring a lot of experience to the table for IoT projects. Great to hear. Sorry. My fingers were too quick. Yes. Indeed, you have a lot of different experience from a lot of the different areas. And we are very, very happy to power Walter with, Soracom connectivity. And now I’m going to press the next button. And those of you who who do not know us, Soracom, global connectivity and IoT platform service provider. We are based out of Japan. We are headquartered in Tokyo, and, we also have some regional headquarters in Seattle in the US, as well as in in London, in Europe. The, powering over five to six million IoT devices today. And, we offer a pay-as-you-go model, but also we also cover monthly subscriptions. If you are interested in in learning more about Soracom, please come and visit soracom.io And under Soracom Partners, there is also a dedicated page that we have dedicated for our partners. And DP Technics has been recently added to that soracom partner space. We are very proud that, you guys are part of our our ecosystem. And, I am very much looking forward to to seeing Walter revolutionize the field of of different development boards. Thank you very much. We’re also delighted to have become a partner of Soracom as the platform is so extensive and has a lot of options that you just don’t find with others like, the the virtual private APN is like a really, interesting one for Walter and Yes. We are really happy with, Soracom. And test it out already all over the world as you if you take a look at the Walter demo page, you will see that our beta testers have tested from Europe to Africa to the US over the single SIM card. So How nice can it become? Great to hear. Really good to hear that it’s been working. And it’s time to look at, the the different, Q and A. There are a lot of lot of different questions. Daan. I think this is gonna be for you. Mhmm. Okay. Just a second. No. I’m I’m skipping that. Actually, there is there is a submitted question here, from Mike asking if Walter can be used with any other SIM provider than Soracom. And, what I see is that there is a nano SIM slot on Walter. And yes, it can be used by any type of carrier. Please confirm, Daan. Yes. Absolutely true. So Walter is not simlocked. We have the the nano sim card slot at the back of Walter. It supports plastic sims from any provider. So, yes, that’s definitely Then there is another one from Gary, and Gary is asking when m q t t will be available. On Walter. Mhmm. MQTT is actually in beta test, but I need to nuance this a bit, because, you can, of course, use mqtt directly, from the AT commands in the modem. But we do know or you should know for cellular IoT that mqtt and or any, TCP based protocol in combination with narrowband IoT, it’s it’s not a good choice. So, therefore, we have in the modem a library from Walter, and we have implemented a CoAP to MQTT bridge. And this is actually in beta test so that you can use MQTT transparently. It’s really easy. Just publish, subscribe, And also on the cloud side, just publish and subscribe to, the the blue cherry broker. And in the in the back end, in the modem library, it’s actually sending these messages through, CoAP. So that’s definitely, available. And something that we can help with when you choose the developer package. Thank you. Another one landing, on your table done, can you send web requests directly from the device? Like POST and GET requests. It’s from Mike. Yes. Yes. Definitely, Mike. That’s, supported in, in the modem library directly. We have no protocol translation for that. So also bear in mind that you best use LTE-M, to do that, as with narrowband, I would say no TLS or TCP based connection is guaranteed to work. We’ll probably work. It’s not your best option, but a normal HTTP post is definitely supported already in the open source, version, both in the micro Python as in the arduino, version. And I see in the chat that also, Kaspar from Toit, is present here in the chats and also in toit. It’s easy to do HTTP requests. Mike is also asking how do we stay up to date with updates and releases on Walter. My initial answer will be check GitHub constantly, but you might have a better answer done. Yeah. So we actually, GitHub is, of course, if you want to be notified of, pushes into the the repositories, then you can, of course, follow GitHub. But I also want to mention that on quick spot, that you can subscribe to our newsletter. We are not going to spam you. We send about one to two newsletters every month to keep you up to date, not only about the software part, but also about how it’s going with the certifications, how production is going, what beta tests that we are doing. So it gives you a general, look about the Walter project and where we are, with the project. Thank you. I can see two more unanswered questions that we can very quickly take Hank is asking that when GNSS is unreachable, can you actually fetch location info from the cell towers directly? Yes. This is possible, of course. You can use the modem to know about, which provider you are connecting but also to which cell tower ID that you are connecting to. Then, of course, you will need an external service to translate this, to a location. It will not be as accurate as an actual GNSS fix, but it will give you a general idea of where you are in the world. Cool. And, I think this is gonna be the last one for today. Does the BLE module support coded PHY. So that one, I will need to look up. I think yes, but I would need to verify and the ESP thirty two is three data sheets. So we’re gonna get back to Stewart on that. Thanks for the questions, George. Great. I think we have, covered pretty much everyone’s questions In case there is anything left for you, please feel free to reach out to us via LinkedIn. That’s, one of the options, but you are also going to receive the handout of this presentation that also includes our contact details and email addresses. I think with that, we can Both thank you for your time and, wish you all a wonderful rest of your day. I hope, I can see you at, some of the upcoming webinars. Thank you once again, and thank you, Daan, so much for joining us today. My pleasure. It was really nice being here and interacting with the audience. So thank you again for having this session with us. Thank you for coming. Take care, everyone.