Why is the LoRa chip rate equal to the bandwidth?
Hi @jreiss, I understand that sensitivity would be the same, however can you clarify why there is a 1:1 ratio between the chip rate and the bandwidth? In other words, if all the chip rates were double...
View ArticleWhy is the LoRa chip rate equal to the bandwidth?
The reason is basically that it is the simplest choice: why choose a different ratio than 1 ? increasing the chip rate without changing the bandwidth gives sharper frequency variation which ends up...
View ArticleLoRaWAN Network Join failed - ERR_INVALID_FREQUENCY (-12)
I have a LILYGO T3_V1.6.1 (915 MHz) LoRa board that I am trying to connect to my TTN application. I have Heltec boards (Lora32 v3) already connected, so I’m pretty sure the application and gateway are...
View ArticleLoRaWAN Network Join failed - ERR_INVALID_FREQUENCY (-12)
SOLVED! I’ll keep this topic rather than delete it just in case somebody else has similar issue, but I figured it out. In short, I had a space on the end of my NwkKey. The combination that first got...
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LoRaWAN Network Join failed - ERR_INVALID_FREQUENCY (-12)
wint0178: The LoRa radio pins were selected by comparing the SX127x_PingPong example from the RadioLib library, with the pins provided at I suspect we need to add a note that says that the pins have...
View ArticleRadioLib (open beta) - a new LoRaWAN v1.1 stack
@stevencellist, thank you for all your effort contributing to the RadioLib library, your support and more broadly your contribution to the LoRaWAN community. I acknowledge that this post dates back to...
View ArticleWrite a mobile application for The Things Stack
Hi all, I’m thinking to write a mobile application (iOS and Android) for The Things Stack? No idea if such mobile application is available yet. And would you like to have it? Thanks a lot and have a...
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RadioLib (open beta) - a new LoRaWAN v1.1 stack
ElectronicallyE: do you still consider LoRaWAN support in RadioLib as “beta”? RadioLib release notes are the source of truth - the LW is considered stable - no substantive changes in months and is...
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RadioLib (open beta) - a new LoRaWAN v1.1 stack
ElectronicallyE: why you felt it was worth the effort? A certain level of “I think I understand LW, let’s do this!” (turns out it was harder than expected), combined with an interesting set of reasons...
View ArticleUse of LoraWAN in Indonesia
Hi Jeff, I tried all possible ways, but can’t get a response. I have worked with other radio technologies in Indonesia, and it is a difficult legislative environment. I will persist and see where I...
View ArticleTTN Erlangen / Nürnberg / Fürth, Germany
The post is already a few years old, but I have an update on it, we are planning a LoRaWAN meeting in Nuremberg on Saturday, May 10, 2025 at 6 pm. More details in this group:...
View ArticleWrite a mobile application for The Things Stack
Hello, i used the droidscript ide to create an android app. this little android test app fetches the data from the ttn storage integration. here are some details:...
View ArticleWhy is the LoRa chip rate equal to the bandwidth?
There is a mathematical relationship between chip rate, symbol rate, and bandwidth. This is true of all communications systems and not specific to LoRa. The “hand-wave answer” is related to the...
View ArticleApplication Layer Clock Synchronization
I’m trying to use Application Layer Clock Synchronization. I enabled it in the Console under General Settings, and I’ve implemented communication based on the TS003 specification. I believe I’m...
View ArticleApplication Layer Clock Synchronization
As v1.0.3 is the most common LW version in use which comes with DeviceTimeReq, I believe that this functionality was included to cover v1.0.2 devices where a time request could be built in to the user...
View ArticleCan't register Gateway - EUI is still in use
Hello TTN Support, We recently deleted a gateway (EUI: B827EBFFFFDCE0CD) from our TTN Community Edition account, intending to re-register it under an organization. However, when attempting to add it...
View ArticleWhy is the LoRa chip rate equal to the bandwidth?
Hi @Clams, Thank you for your comment. Your point about frequency drift makes sense at higher SF makes sense (symbols are longer, making it more susceptible to frequency drift). I just want to clarify...
View ArticleRadioLib (open beta) - a new LoRaWAN v1.1 stack
Thanks for explaining. You sure set yourself a high bar with these challenges!
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Can't register Gateway - EUI is still in use
youms: Could you kindly assist in releasing the EUI so we can re-register it? Almost no one visiting the forum can do this. Please post on Slack where a TTI staff member can give your request some...
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Can't register Gateway - EUI is still in use
youms: B827EBFFFF Raspberry Pi based device? youms: "gateway_eui": "B827EBFFFFDCE0CD", "gateway_id": "b827ebffffdce0cd" youms: We recently deleted a gateway Are you attempting to reregister under new...
View ArticleWhy is the LoRa chip rate equal to the bandwidth?
The argument is more about the worst case supported: there is official support for up to 500kHz for sub-Ghz radio, and changing the ratio time/bandwidth would impact this worst case. And the PLL...
View ArticleCan't register Gateway - EUI is still in use
Thank you for your prompt reply. The gateway is a Raspberry Pi Model 3, to which a Lora module is connected. One option I have is to spoof the mac address at the source code level, but I wish I was...
View ArticleCan't register Gateway - EUI is still in use
Thank you for replying : ) Yes it is a Raspberry Model 3 and the EUI is derived from its MAC address We used a different GWID after reading all the replies in this thread. We kept having the same...
View ArticleCan't register Gateway - EUI is still in use
No point repeating the same info, we can all see the thread. If the gateway has been deleted, the EUI should be reusable but NOT the Id. The Id is NOT the EUI. Nor is the EUI the Id. So overall, you...
View ArticleCan't register Gateway - EUI is still in use
I understand the difference between a GWID and a GWEUI and in principle, if I delete a particular EUI, I should be able to reuse it, though with a different ID. That was out intention, reusing the EUI...
View ArticleCan't register Gateway - EUI is still in use
Are you seeing the same Code 6 error as pasted above with the new GW ID? Can you copy and paste again so we see the latest version. Which concentrator module? which code base/packet forwarder? Have...
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Can't register Gateway - EUI is still in use
The error code 6 is persistent; I just tried registering the gateway using another ID and got the same error: { "code": 6, "message": "error:pkg/identityserver:gateway_eui_taken (a gateway with EUI...
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Can't register Gateway - EUI is still in use
youms: "administrative_contact": "jlayon" Does this name ring a bell? That is the current ‘owner’ of this EUI as far as TTN is concerned.
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Can't register Gateway - EUI is still in use
youms: though the gateway was deleted (the prompt with warning gave us that assurance) The prompt with warning comes up before the request is made to delete. A ‘toast’ will popup in light green...
View ArticleApplication Layer Clock Synchronization
I suggested @vitkolar to use RTC. With rare DeviceTimeReq it can set the RTC every year I suppose. @descartes a) What about to ask a downlink every month to correct the unstable AVR timer? It’s again...
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Can't register Gateway - EUI is still in use
youms: The code base is that of Condungpham on Github Sorry but this is a LoRa GW not a LoRaWAN GW - TTN is about LoRaWAN. This is a SCPF design and should not be connected to TTN. It is not supported...
View ArticleWhy is the LoRa chip rate equal to the bandwidth?
Awesome, thank you @Clams. Now I’m getting it. Here’s my summary: There’s not really a deep law of physics which says there has to be a 1:1 ratio between the chip rate and the bandwidth, rather it’s...
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Visualizing packetbroker data
Hi @bertrik , great idea. It would be useful if your visualisation could show gateways data from tts cloud, also. Is it possible?
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Application Layer Clock Synchronization
clv: to use RTC Absolutely for the best, because I tried to calibrate old series AVR to use as a clock - the proof of concept was actually along side my RF receiver alarm clock for comparison for a...
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Application Layer Clock Synchronization
descartes: The AVR would be off by about 1.5 seconds every day For me this is not a deal breaker, since in LoRaWAN world we are not realtime and the uplink have information about time from the LNS /...
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Application Layer Clock Synchronization
clv: since in LoRaWAN world we are not realtime Which is why I asked the OP why they wanted to do this. I’ve only got one deployment that uses the actual time via TimeReq and even then it doesn’t...
View ArticleMultiple clients connection to mqtt server
I have one application in ttn and 3 mqtt clients at the same time, which will connect to this server. All use the same credentional. ( I set it up under mqtt integration). The first client works well....
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Multiple clients connection to mqtt server
hansju22: Is this a problem? Yes - you are tripling the load on a free service that other people rely on. Web hooks are OK - no continuous connection required. But the TTN MQTT broker can only do so...
View ArticleUnable to reset password for old account
I’m trying to reset password for my old and no more in use account where there is registered a gateway i have to unregister and unassociate. i try to reset my password i receive the link to reset...
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Unable to reset password for old account
bazzu: email=biondi.engineering % 25 40 gmail.com The bit in bold seems rather odd, I’d expect fred@domain.com to be fred%40domain.com It may be that something went wrong with typing in the address...
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TTN Mapper using ttgo-tbeam
TTN Mapper using ttgo-tbeam Programmed a ttgo-tbeam-ttn-tracker using a – LILYGO® T-Beam LILYGO® TTGO Meshtastic T-Beam V1.1 ESP32 LoRa 433/868/915/923Mhz Wireless Module WiFi GPS NEO-6M With OLED...
View ArticleTTN devnonce is too small error
Hi Team, I am facing some issues with the LoRaWAN MAC layer version 1.0.4. I have registered and called the store context function, but I am still having trouble switching the end nodes in the TTN...
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TTN devnonce is too small error
gtmahesh: The first attempt works fine, but I encounter this devNonce error on the second attempt That means you have a persistence issue. Either saving the nonce or retrieving it after restart fails....
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TTN devnonce is too small error
gtmahesh: Please confirm on your side. You are on the same side as us - this is not TTI support, this is the TTN community forum. Anyone can read the source code, but we, in the main, are not the...
View ArticleDevnonce is too small error while switching end nodes in TTN
hi guys, I am experiencing an issue related to the “devnonce is too small” error. When I attempt to switch end nodes in the TTN network, I change the end node network keys (such as Join EUI, Dev EUI,...
View ArticleUnknown certificate authority using webhooks integration
I ran into a similar issue after switching to a RapidSSL certificate. TTN was showing “Unknown certificate authority” until I made sure the full certificate chain (including intermediates) was...
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Devnonce is too small error while switching end nodes in TTN
Do not double post as it splits volunteers efforts and fragments any responses making later searches and solutions discovery harder! Use your original thread, and please respond to the questions you...
View ArticleDevnonce is too small error while switching end nodes in TTN
Additionally, answer the questions, then you can help faster than a double post!
View ArticleTTN Mapper using ttgo-tbeam
Tbeam V.1.1 became obsolete. Does the software work with Tbeam V.1.2?
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Datacake status pending and error running payload decoder
Hello there, I am having trouble with integrating Datacake as webhook with my TTN. It is a simple project I have 2 sensors, 3 axis accelerometer and shtc3 (temp and humidity sensor) sending packets to...
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