# Application Development **URL:** https://www.thethingsnetwork.org/forum/c/application-development/15.md?page=2 [Latest](https://www.thethingsnetwork.org/forum/latest.md) · [Categories](https://www.thethingsnetwork.org/forum/categories.md) · [Tags](https://www.thethingsnetwork.org/forum/tags.md) **Page:** 3 --- ## [Storage intération downlink fail Can't do push windows form](https://www.thethingsnetwork.org/forum/t/storage-interation-downlink-fail-cant-do-push-windows-form/63166)
**Author:** [@axolot](https://www.thethingsnetwork.org/forum/u/axolot)\ **Replies:** 5\ **Last updated:** [May 25, 2023, 8:35am UTC](https://www.thethingsnetwork.org/forum/t/storage-interation-downlink-fail-cant-do-push-windows-form/63166 "2023-05-25T08:35:43Z")
Summaryfirst time asking on forum in my life… Hi. I am m trying to do a Windows form application that can retrieve and send data to my lorawan device so I won’t need to get on the ttn site and checking live data and use… --- ## [No more MQTT Messages from Subscription .../down/sent](https://www.thethingsnetwork.org/forum/t/no-more-mqtt-messages-from-subscription-down-sent/62513)
**Author:** [@MarcBerg](https://www.thethingsnetwork.org/forum/u/MarcBerg)\ **Replies:** 2\ **Last updated:** [April 13, 2023, 6:12am UTC](https://www.thethingsnetwork.org/forum/t/no-more-mqtt-messages-from-subscription-down-sent/62513 "2023-04-13T06:12:20Z")
Hello, for about two years I have successfully subscribed to MQTT on a Topic "v3/\@ttn/devices/\/down/sent. The device is a Dragino LDDS75. Since yesterday I do not receive any messages for this subscriptio… --- ## [Can't Publish Downlinks via MQTT Since 3.25.0 Update](https://www.thethingsnetwork.org/forum/t/cant-publish-downlinks-via-mqtt-since-3-25-0-update/62394)
**Author:** [@mpvima](https://www.thethingsnetwork.org/forum/u/mpvima)\ **Replies:** 2\ **Last updated:** [April 4, 2023, 5:30pm UTC](https://www.thethingsnetwork.org/forum/t/cant-publish-downlinks-via-mqtt-since-3-25-0-update/62394 "2023-04-04T17:30:55Z")
Hello, Since the last upgrade of The Things Stack Cloud to v 3.25.0 on April 3rd, I’ve been experiencing an issue with posting downlinks via MQTT. I am using the following topic for publishing downlinks: v3/{applicatio… --- ## [In which order are the gateways in rx\_metadata stored?](https://www.thethingsnetwork.org/forum/t/in-which-order-are-the-gateways-in-rx-metadata-stored/62354)
**Author:** [@ecosoph](https://www.thethingsnetwork.org/forum/u/ecosoph)\ **Replies:** 1\ **Last updated:** [April 2, 2023, 4:13pm UTC](https://www.thethingsnetwork.org/forum/t/in-which-order-are-the-gateways-in-rx-metadata-stored/62354 "2023-04-02T16:13:03Z")
For my application, I want to log the signal strengths of one LoRa node for different gateways. I have managed to log the data for a single gateway. Now, I would like to expand to multiple gateways. I have following app… --- ## [Decoding payload - LNS](https://www.thethingsnetwork.org/forum/t/decoding-payload-lns/62165)
**Author:** [@Johan\_Scheepers](https://www.thethingsnetwork.org/forum/u/Johan_Scheepers)\ **Replies:** 13\ **Last updated:** [March 24, 2023, 9:50pm UTC](https://www.thethingsnetwork.org/forum/t/decoding-payload-lns/62165 "2023-03-24T21:50:21Z")
Do the LNS always decode the payload or are there instances where is does not do it? --- ## [Add some ML to your devices, physical workshop in Amsterdam 27 March](https://www.thethingsnetwork.org/forum/t/add-some-ml-to-your-devices-physical-workshop-in-amsterdam-27-march/62107)
**Author:** [@janjongboom](https://www.thethingsnetwork.org/forum/u/janjongboom)\ **Replies:** 0\ **Last updated:** [March 22, 2023, 9:51am UTC](https://www.thethingsnetwork.org/forum/t/add-some-ml-to-your-devices-physical-workshop-in-amsterdam-27-march/62107 "2023-03-22T09:51:29Z")
If you can’t wait for the next The Things Conference to learn how to add some Machine Learning to your TTN devices (and pretty sure the workshops were booked solid last year) Edge Impulse is hosting a full day, in-person… --- ## [OAuth error: Session not found error](https://www.thethingsnetwork.org/forum/t/oauth-error-session-not-found-error/61892)
**Author:** [@oliviergrenoble](https://www.thethingsnetwork.org/forum/u/oliviergrenoble)\ **Replies:** 1\ **Last updated:** [March 10, 2023, 3:46pm UTC](https://www.thethingsnetwork.org/forum/t/oauth-error-session-not-found-error/61892 "2023-03-10T15:46:27Z")
Hi there I have an Android Application which uses an OAuth2.0 authentication to gets connected to TTN. It is running fine on the phone that I use most of the time for my devs (A Pixel 6 phone running Android 13). Yest… --- ## [Community- AWS Integration-Invalid PhysicalResourceId](https://www.thethingsnetwork.org/forum/t/community-aws-integration-invalid-physicalresourceid/61575)
**Author:** [@amcreed99](https://www.thethingsnetwork.org/forum/u/amcreed99)\ **Replies:** 3\ **Last updated:** [February 28, 2023, 3:17pm UTC](https://www.thethingsnetwork.org/forum/t/community-aws-integration-invalid-physicalresourceid/61575 "2023-02-28T15:17:34Z")
Hello all, I have been following the Deployment Guide that is on the TTN. Similar to other posts Enterprise Solution and this Unsolved post I have a problem with the stack formation on the AWS side and receive the err… --- ## [Android MQTT Client not working "stream terminated by RST\_STREAM with error code: PROTOCOL\_ERROR](https://www.thethingsnetwork.org/forum/t/android-mqtt-client-not-working-stream-terminated-by-rst-stream-with-error-code-protocol-error/61644)
**Author:** [@se-bk](https://www.thethingsnetwork.org/forum/u/se-bk)\ **Replies:** 1\ **Last updated:** [February 25, 2023, 10:19am UTC](https://www.thethingsnetwork.org/forum/t/android-mqtt-client-not-working-stream-terminated-by-rst-stream-with-error-code-protocol-error/61644 "2023-02-25T10:19:44Z")
Hello, i just want to set uop an Android MQTT Client. I tested several clients in the google plaground store, but i cant get any connections. With the PC-Program MQTT-Explorer i can get a connection. I followed the i… --- ## [The Things Network and bloxberg blockchain](https://www.thethingsnetwork.org/forum/t/the-things-network-and-bloxberg-blockchain/61481)
**Author:** [@INRA](https://www.thethingsnetwork.org/forum/u/INRA)\ **Replies:** 6\ **Last updated:** [February 16, 2023, 12:59pm UTC](https://www.thethingsnetwork.org/forum/t/the-things-network-and-bloxberg-blockchain/61481 "2023-02-16T12:59:45Z")
Dear TTN community, We are happily using TTN for several years now in AGAP Institute, a research unit of INRAE wich is a French public research institution. Sensors are used for fetching data during experiment, monitor… --- ## [MQTT : Failing to receive "service/data"](https://www.thethingsnetwork.org/forum/t/mqtt-failing-to-receive-service-data/61210)
**Author:** [@oliviergrenoble](https://www.thethingsnetwork.org/forum/u/oliviergrenoble)\ **Replies:** 2\ **Last updated:** [January 30, 2023, 3:45pm UTC](https://www.thethingsnetwork.org/forum/t/mqtt-failing-to-receive-service-data/61210 "2023-01-30T15:45:08Z")
I have installed an application called “MyMQTT” on my Android Smartphone and I have subscribed to receive MQTT notifications coming from TTN. When my device is connected or send a message, I do receive notifications for … --- ## [MQTT in Node-RED \[HowTo\]](https://www.thethingsnetwork.org/forum/t/mqtt-in-node-red-howto/39909)
**Author:** [@arjanvanb](https://www.thethingsnetwork.org/forum/u/arjanvanb)\ **Replies:** 18\ **Last updated:** [January 27, 2023, 4:51am UTC](https://www.thethingsnetwork.org/forum/t/mqtt-in-node-red-howto/39909 "2023-01-27T04:51:24Z")
Node-RED has built-in support to act as an MQTT client, which can be used with TTN’s MQTT Data API. :warning: For new developments, one should not use the The Things Network’s node-red-contrib-ttn, which is no longer s… --- ## [Accessing DEV\_EUI value from TTN message](https://www.thethingsnetwork.org/forum/t/accessing-dev-eui-value-from-ttn-message/61040)
**Author:** [@ambrogio](https://www.thethingsnetwork.org/forum/u/ambrogio)\ **Replies:** 8\ **Last updated:** [January 20, 2023, 1:40pm UTC](https://www.thethingsnetwork.org/forum/t/accessing-dev-eui-value-from-ttn-message/61040 "2023-01-20T13:40:28Z")
In my application there are a certain number of data-loggers that acquire environmental data. They are all connected via the TTN network. The message payload contains, among other things, the serial number of the end nod… --- ## [Adding dev\_eui to a payload](https://www.thethingsnetwork.org/forum/t/adding-dev-eui-to-a-payload/61043)
**Author:** [@enicaltd](https://www.thethingsnetwork.org/forum/u/enicaltd)\ **Replies:** 1\ **Last updated:** [January 19, 2023, 3:44pm UTC](https://www.thethingsnetwork.org/forum/t/adding-dev-eui-to-a-payload/61043 "2023-01-19T15:44:02Z")
Hi all. I have a number of adeunis pulse devices where I have a payload formatter that simply outputs the 2 avaiable channel values in the payload. It works great for the webhooks I currently have. However, I have a new… --- ## [How to specify parameters for an HTTP get request](https://www.thethingsnetwork.org/forum/t/how-to-specify-parameters-for-an-http-get-request/60740)
**Author:** [@ecosoph](https://www.thethingsnetwork.org/forum/u/ecosoph)\ **Replies:** 2\ **Last updated:** [January 3, 2023, 5:06pm UTC](https://www.thethingsnetwork.org/forum/t/how-to-specify-parameters-for-an-http-get-request/60740 "2023-01-03T17:06:40Z")
I’ve set up working end devices as well as the storage integration and an API key. I can query the data using the CURL reference provided in the documentation and also a bare minimum python code example is working: imp… --- ## [How to find trigger point/ event for TTN storage integration API](https://www.thethingsnetwork.org/forum/t/how-to-find-trigger-point-event-for-ttn-storage-integration-api/60709)
**Author:** [@sharadt](https://www.thethingsnetwork.org/forum/u/sharadt)\ **Replies:** 1\ **Last updated:** [January 2, 2023, 11:25am UTC](https://www.thethingsnetwork.org/forum/t/how-to-find-trigger-point-event-for-ttn-storage-integration-api/60709 "2023-01-02T11:25:50Z")
Hello All, I am fetching data from TTN storage integration API and dump into the PostgreSQL database. I run the python script manually for fetching data but I want trigger point for storage integration API i.e. when new… --- ## [Correlation IDs](https://www.thethingsnetwork.org/forum/t/correlation-ids/60616)
**Author:** [@kiff](https://www.thethingsnetwork.org/forum/u/kiff)\ **Replies:** 21\ **Last updated:** [December 29, 2022, 12:37pm UTC](https://www.thethingsnetwork.org/forum/t/correlation-ids/60616 "2022-12-29T12:37:58Z")
Hello, I am developing an application for a class C TTN device and have a couple of newbie questions, if someone would be kind enough to point me in the right direction. I’ve looked at many docs, posts. What would be t… --- ## [Android app to monitor Lorawan devices?](https://www.thethingsnetwork.org/forum/t/android-app-to-monitor-lorawan-devices/36240)
**Author:** [@stepic7](https://www.thethingsnetwork.org/forum/u/stepic7)\ **Replies:** 15\ **Last updated:** [April 24, 2020, 9:18am UTC](https://www.thethingsnetwork.org/forum/t/android-app-to-monitor-lorawan-devices/36240 "2020-04-24T09:18:20Z")
Sorry if it’s a naive question Is there an Android App just to monitor what devices do over internet? (be either a measurement or an action they are supposed to do) I saw Termux or Redmobile on Google play however I u… --- ## [Integration webhook tagoio](https://www.thethingsnetwork.org/forum/t/integration-webhook-tagoio/60410)
**Author:** [@emes](https://www.thethingsnetwork.org/forum/u/emes)\ **Replies:** 0\ **Last updated:** [December 14, 2022, 12:10am UTC](https://www.thethingsnetwork.org/forum/t/integration-webhook-tagoio/60410 "2022-12-14T00:10:54Z")
Hi I use webhook tagoio integration. After several days of normal use it stopped. At “Live data”, i got message “Fail to send webhook”. Event detail write : “Invalid authorization header"}”, “status\_code”: 401," I di… --- ## [Manage your devices and gateways using a free mobile app](https://www.thethingsnetwork.org/forum/t/manage-your-devices-and-gateways-using-a-free-mobile-app/58474)
**Author:** [@DPI-OAI](https://www.thethingsnetwork.org/forum/u/DPI-OAI)\ **Replies:** 6\ **Last updated:** [December 7, 2022, 11:47pm UTC](https://www.thethingsnetwork.org/forum/t/manage-your-devices-and-gateways-using-a-free-mobile-app/58474 "2022-12-07T23:47:03Z")
Hi, we are using TTN across a number of agricultural pilots to demonstrate how digital sensors can help farmers adapt to climate change and increasing climate variability. Along the way we’ve installed a few hundred de… --- ## [Clear storage integration data](https://www.thethingsnetwork.org/forum/t/clear-storage-integration-data/59834)
**Author:** [@planeuge](https://www.thethingsnetwork.org/forum/u/planeuge)\ **Replies:** 3\ **Last updated:** [November 9, 2022, 9:19am UTC](https://www.thethingsnetwork.org/forum/t/clear-storage-integration-data/59834 "2022-11-09T09:19:01Z")
Hello! I am currently working on a project with sensors sending data via LoRaWAN. I created an application, added my end devices and everything works fine. Now I want to use the storage integration, which works fine too… --- ## [Payload formatter not added to integration JSON](https://www.thethingsnetwork.org/forum/t/payload-formatter-not-added-to-integration-json/59764)
**Author:** [@proffalken](https://www.thethingsnetwork.org/forum/u/proffalken)\ **Replies:** 9\ **Last updated:** [November 6, 2022, 7:56pm UTC](https://www.thethingsnetwork.org/forum/t/payload-formatter-not-added-to-integration-json/59764 "2022-11-06T19:56:41Z")
I have a node that is sending a simple value of 90. I have a decoder that is the most basic possible: function decodeUplink(input) { return { data: { bytes: input.bytes, f\_port: input.fPort }, … --- ## [SOLVED - AWS integration issue \[Configuration - Invalid PhysicalResourceId\]](https://www.thethingsnetwork.org/forum/t/solved-aws-integration-issue-configuration-invalid-physicalresourceid/55803)
**Author:** [@grizzlyalleyne](https://www.thethingsnetwork.org/forum/u/grizzlyalleyne)\ **Replies:** 3\ **Last updated:** [November 3, 2022, 9:56am UTC](https://www.thethingsnetwork.org/forum/t/solved-aws-integration-issue-configuration-invalid-physicalresourceid/55803 "2022-11-03T09:56:47Z")
Hello all, I am trying to integrate AWS IoT with my LoRa application. I followed the newest guidance provided by The Things Network on integrating AWS IoT. I created an API key (with the proper settings via the documenta… --- ## [Payload Formatting ---- Javascript basics](https://www.thethingsnetwork.org/forum/t/payload-formatting-javascript-basics/59344)
**Author:** [@ridgerunnersjw](https://www.thethingsnetwork.org/forum/u/ridgerunnersjw)\ **Replies:** 1\ **Last updated:** [October 15, 2022, 12:37pm UTC](https://www.thethingsnetwork.org/forum/t/payload-formatting-javascript-basics/59344 "2022-10-15T12:37:29Z")
Hello all… I am using a SEEED Lora-E5 module and sending ASCII messages to the TTN (testing only)…The messages show up as hexadecimal. I would like to convert the message back to the ascii string. I am very new to this… --- ## [How to use fetch() in payload formatter javascript code?](https://www.thethingsnetwork.org/forum/t/how-to-use-fetch-in-payload-formatter-javascript-code/59349)
**Author:** [@tibbe](https://www.thethingsnetwork.org/forum/u/tibbe)\ **Replies:** 1\ **Last updated:** [October 13, 2022, 11:53am UTC](https://www.thethingsnetwork.org/forum/t/how-to-use-fetch-in-payload-formatter-javascript-code/59349 "2022-10-13T11:53:51Z")
Is it possible to make network requests in the javascript payload formatter code on TTN console? I tried using fetch() but got some unknown error. var fs = require('fs'); import fetch from "node-fetch"; Error: Syntax… --- ## [AWS IoT Integration Device Registry Not Synchronising](https://www.thethingsnetwork.org/forum/t/aws-iot-integration-device-registry-not-synchronising/58985)
**Author:** [@haard](https://www.thethingsnetwork.org/forum/u/haard)\ **Replies:** 1\ **Last updated:** [September 23, 2022, 9:54am UTC](https://www.thethingsnetwork.org/forum/t/aws-iot-integration-device-registry-not-synchronising/58985 "2022-09-23T09:54:42Z")
Hey, Our AWS IoT Integration completes successfully but the device registry between the TTN and AWS IoT is not synchronizing. I have a private LoRaWAN network which sits under an Enterprise AWS Stack. I have deployed a… --- ## [Displaying data from TTN using ESP8266](https://www.thethingsnetwork.org/forum/t/displaying-data-from-ttn-using-esp8266/54066)
**Author:** [@Passepartout](https://www.thethingsnetwork.org/forum/u/Passepartout)\ **Replies:** 10\ **Last updated:** [September 18, 2022, 11:29am UTC](https://www.thethingsnetwork.org/forum/t/displaying-data-from-ttn-using-esp8266/54066 "2022-09-18T11:29:15Z")
Hello, I have a few nodes running properly using TTN V3. At the moment I’m using Cayenne to display the data on a PC. But I’m looking for a solution displaying the data using a display like the Nextion without using a … --- ## [TTN vs AWS](https://www.thethingsnetwork.org/forum/t/ttn-vs-aws/58888)
**Author:** [@ebenl](https://www.thethingsnetwork.org/forum/u/ebenl)\ **Replies:** 1\ **Last updated:** [September 15, 2022, 7:53pm UTC](https://www.thethingsnetwork.org/forum/t/ttn-vs-aws/58888 "2022-09-15T19:53:10Z")
Hello, I was wondering what is the difference between 1) TTN Lns with AWS integration and 2) AWS IoT Core with Lns only? Why would you use the one over the other if you have your own gateways? With own gateways, is 2) … --- ## [Connect TTN to existing AWS IoT Deployment](https://www.thethingsnetwork.org/forum/t/connect-ttn-to-existing-aws-iot-deployment/58814)
**Author:** [@vdemcak](https://www.thethingsnetwork.org/forum/u/vdemcak)\ **Replies:** 0\ **Last updated:** [September 9, 2022, 2:05pm UTC](https://www.thethingsnetwork.org/forum/t/connect-ttn-to-existing-aws-iot-deployment/58814 "2022-09-09T14:05:54Z")
Hello, I already have a running AWS IoT deployment using the Helium network and I’d like to just add TTN to it. Is this possible without all the cloud formation hassle? Thanks. --- ## [TTN connection to Azure lost when changing Azure DB password](https://www.thethingsnetwork.org/forum/t/ttn-connection-to-azure-lost-when-changing-azure-db-password/58436)
**Author:** [@TUJP](https://www.thethingsnetwork.org/forum/u/TUJP)\ **Replies:** 0\ **Last updated:** [August 12, 2022, 11:53am UTC](https://www.thethingsnetwork.org/forum/t/ttn-connection-to-azure-lost-when-changing-azure-db-password/58436 "2022-08-12T11:53:23Z")
Hi all, At the risk of asking something too obvious: we’ve been running TTN connected devices for over a year now with no issues after going to LMIC-node as the SW base for our devices up until Jul 30 all data was dut… [Previous page](https://www.thethingsnetwork.org/forum/c/application-development/15.md?page=1) [Next page](https://www.thethingsnetwork.org/forum/c/application-development/15.md?page=3)