Seems like there was a bug in the library I'm using. The default mode is MODE_LONGDATA_RANGE_LOWPOWER. There is a function to change this, used in the example sketch to select MODE_LONGDATA_RANGE_ACCURACY. However, this code looks suspiciously like the defaults are being set again before each transmission.... void DW1000RangingClass::transmitInit() { DW1000.newTransmit(); DW1000.setDefaults(); } After editing the library to change the default to MODE_LONGDATA_RANGE_ACCURACY, I was able to get signal at longer ranges, but still nowhere close to 300 meters. It was pretty reliable up to 30m, then patchy until 50m after which there was mostly no connection. The furthest distance I saw was 72m. According to the datasheet MODE_LONGDATA_RANGE_ACCURACY should be the best for range, ie: MODE_LONGDATA_RANGE_ACCURACY[] = {TRX_RATE_110KBPS, TX_PULSE_FREQ_64MHZ, TX_PREAMBLE_LEN_2048}; Does it seem reasonable that with better antennas this might make it to 300 meters? I'm not sure, perhaps it would. I'm also now wondering if there might not be more problems in the library...

The lights on the bridge of the Starship Enterprise never really told them anything either but, like yours, it did look cool. :)

From looking at the PCB, it looks like there is a couple of things. One is the size of the PCB itself, the datasheet states in 5.1: "It is also important to note that the ground plane on the application board affects the DWM1000 antenna radiation pattern. In Figure 8 below, d must be a minimum of 10 mm. This gives the most vertically polarized radiation pattern. As d is increased from 10 mm the degree of vertical polarization reduces." In your case d is 6.096mm, so that could be one reason you're getting poor performance. Also I'd recommend a slightly better ground plane, D9 is almost splitting your ground plane in half, the module ground has to take a longer path which can affect performance. Add top ground plane and via stitching between the planes. I'd also recommend getting the decoupling caps (100nF caps) closer to the ATMega and giving the module a few decoupling caps. If you want, flick me a youtube message and I can help drive some board improvements via Skype or Discord.

Really interesting keep the PCB vids coming, also love the landing bay idea

Neat stuff! Thanks for the info.

Thanks for your videos you are really great.

Thanks Chris, very interesting

Thank you. Currently, your video has helped a lot in conducting similar experiments. I am Korean. I express my intention to you using a translator.

Cool project! That is surprisingly low power transmission if you are only receiving -80dBm when you are right next to it. There must be a higher power transmit mode you can enable somehow. When you were out at 8m, with -100dBm I'm not surprised it was dropping out. Might need to dig into the settings to figure out how to configure higher power.

I remember reading something about different tx powerlevels in datasheet. Would be useful if you output the registers and check. Also it might be silly but are you sure your modules dont transmit at same time? You usually need to sync the clocks and have them tx in sequence.

Intresting stuff! My first thought when this video started was also makeshift super-acurate 3D Positioning, too bad the range is that bad. Imagine you could do this with NRF24L01 modules :)

Excellent project

I wonder how much difference the power supply makes to these. You are using USB from your phone which will be stepped up from the internal battery voltage and probably quite noisy. I've found that RF stuff often sucks with USB power, e.g. GPS performance is severely reduced.

In your projet, is the stationnary one coded as an anchor and the one you read serial output on your phone coded as a tag ? Cause' i've built a prototype with two ESP32 board with a newer Decawave chip, the DW3000 chip (compatible with Apple's U1 chip). and got better results, but I'm still guessing on how I could built a scenario where the tag knows how far it is from a particular anchor, and not just "an anchor". How can I "set" the ID of an anchor and be able to read it on the tag.

Interesting products Thanks for sharing :-)

This technology is very exciting! Granted, it has some issues for now. I first became aware of this technology when the latest iPhone added it last year iirc. It is used to sense the direction and location of other iPhones and is rumored to be used to find tags soon (keychain tag etc). Have you heard of AGPS? When GPS is combined with one very accurate distance measurement to a fixed base station, it can be used to make GPS much more accurate. I think it's used in marine applications. Your videos are very interesting / entertaining. Especially during this time where we all have to stay home a bit more than usual. Cheers! PS: Wait, didn't you even make a video about the "assisted gps" a while back? The video with one stationary gps receiver? I must be mixing it up with something else

It's a bummer! I really had high hopes for this HW! It looks like the f9p is inevitable!

Aha! I know just the place to test it. Cracking idea. Folks would go nuts for that, renders and wild claims required. What about a precision flight path into the pad as well a line to fly down? All the best from #VertiportAfrica

Would there be any point in using external, directional antennae? Defeats the purpose of omni-directional UWB and position triangulation but you may get your 300m!

I have Ai thinker uwb development board, so is it possible to program it by Arduino ide or i have to use another?

It’s very interesting, would you mind share your arduous script?

What an amazing place! Where is it?

This video is quite old, and currently im doing some research on these for a work project. What isnt well documented is that you need to set the antenna delay to get decent accuracy. Otherwise as you indicated the antenna delay will contribute to the distance measurement. THere is an arduino sketch somewhere for auto calibrating the ADELAY. do that and the accuracy will increase significantly.

there is a relationship between dBm and the angle between the DWM1000?

wondering if Ultra Wideband technology can handle very law latency audio streaming project ?

thanks for sharing your findings. have been considering getting hold of a few samples to play around with. any further progress with your project?

Have you tried the nanotron UWB chip?

I checked the specs of DecaWave's own DW1000 two-way ranging evaluation kit , and they listed the range as 40 ft which is about 12 meters.

Hello! It is very interesting! Can I ask you what app are you using on your phone?

Thanks for your video. In trying to bring up your PCB design in EasyEDA, can find it but it does not load, saying "document does not exist". Can possibly update the library?

Could it be that you need a better antenna?

Hello. I am trying to communicate two ultra wideband bu01 dw1000 chip using esp32 d1 mini without any breakout board. What i did was to etch a pcb board and only solder the necessary pins to communicate 2 uwb with each other. The pins soldered was the SPI pins (CLK, MOSI, MISO), CS pin ,IRQ pin, RSTn, VSS, and VDD3v3. I checked the soldered pins with multimeter and there is no shorts in wiring connections or whatever. But it just doesn't work. Any ideas why?

Regarding the range: u should look at the datasheet and see if u can't modify a modem bitrate register or smtng. If u turn down the bitrate, u should have drastically improved range. Datasheet said 290m range max, and ur in the middle of a field-- the range ur getting otherwise makes no sense.

Modules don't seem very useful in their current form, but interesting video nontheless. Didn't know this was (one of?) the technologies behind indoor positioning... seems like if implemented correctly it would be great for quadcopters, or even autonomous vacuum cleaners ;) The LEDs are showing something useful.. devil is in the details. From left to right... LED1 was showing when the module had finished transmitting something, LED2 was showing when the receiver was active, and LED3 was showing when the receiver had heard something valid... so really for the anchor you probably just want the TX LED (LED1), and for the key RX_OK (LED3)... although RX (LED2) would be good to have also... so you can tell that it is still listening but not hearing valid info. Hope you have luck with them in the future!

I was working on the same project, but for the processor I am using SAMD21G18. I am also getting range of around 8 meters, but the datasheet says it is 300 meters. Have you found any solution for that? Can I have your contacts to share the progress on the project and perhaps help each other. Thanks!

hi , guys . Have you tried connecting 2 or more tags?

I wish I was smart enough to look at the documentation for this and understand what I'm looking at... I was looking for cheap solutions to create tracking system for players in paintball/airsoft/nerft/lasertag with +-1m accuracy to implement capture zones domination style that would count players within specified area akin to video game and pushed capture towards the team with more alive players within the capture zone. Guess there aren't dumb-proof hand holding guides for everything on the internet T_T

have you seen this ? The Daatasheet claims 290 meters @ 110 kbps, page 29 Table 25 states the operation modes, also there are some pages about TX power ... maybe this thing is just not "switched on" properly ? ^^ www.decawave.com/sites/default/files/resources/DW1000-Datasheet-V2.12.pdf i guess the stuff you have to send over spi is in there too ...

Thank you for a good video. I set the DW1000's Mode to LONGDATA_RANGE_LOWPOWER, but if I get more than 7M, communication is cut off. Can you guess why?

really like the virtiport idea, even 8 meters should be acceptable for GPS accuracy no? anyways like always, thanks for the heads up

Hi @iforce2d, it would be great if you could share your code? And do you know any code written in Python which uses UWB to get distance as well?? thanks

$25 doesn't seem like a good deal for something that doesn't work. According to the datasheet section you showed us, RX indicates signal is being received at the RF level, akin to putting a light on an RX pin of a wired bus. RXOK indicates that a data packet was completely received and was decoded without error. So RX is a physical layer (layer 1) receive, while RXOK is a media layer (layer 2) receive.

Hi i'm new to This technologie and i'm using MDEK1001 so i hope if anyone could help me to use it well thank you guys

What purpose to use uwb in outdoor?

+

Can dwm1000 measure distance while transmitting data?

So you follow the Scrappy build too. Nice :)

Maybe the SX1280 would be better.

Max distance?

Your antenna is around the wrong way

Would enjoy a pcb creation and build video. You should add a gps to your 328p pcb design, the Quectel L70 is a very low power module with great performance (tracking 15 mA) but you have to add an antenna, the L80 module has a antenna, slightly more current but also good performance. Both are easy soldering surface mount modules. Here is some interesting reading in detailed gps performance tests. github.com/LoRaTracker/GPSTutorial/blob/master/GPS%20performance%20comparisons/Readme.md I think you will find it interesting. (Not my own work to add) Thank you, your videos a few years back sparked my interest in arduino and gsm modules and I now have a few projects of my own. 👍🏻

You nearly had it. The ceramic antenna needs aligned.

So you're using the signal power to measure distance.. Need a list of reasons for why that is completely unreliable?

im early what do i say

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