# End Devices (Nodes) **URL:** https://www.thethingsnetwork.org/forum/c/nodes/7.md?no_subcategories=false&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 --- ## [Application Layer Clock Synchronization](https://www.thethingsnetwork.org/forum/t/application-layer-clock-synchronization/71151)
**Author:** [@vitkolar](https://www.thethingsnetwork.org/forum/u/vitkolar)\ **Replies:** 5\ **Last updated:** [April 16, 2025, 10:04am UTC](https://www.thethingsnetwork.org/forum/t/application-layer-clock-synchronization/71151 "2025-04-16T10:04:54Z")
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 sending valid uplink pack… --- ## [RadioLib (open beta) - a new LoRaWAN v1.1 stack](https://www.thethingsnetwork.org/forum/t/radiolib-open-beta-a-new-lorawan-v1-1-stack/65534)
**Author:** [@stevencellist](https://www.thethingsnetwork.org/forum/u/stevencellist)\ **Replies:** 13\ **Last updated:** [April 15, 2025, 6:09am UTC](https://www.thethingsnetwork.org/forum/t/radiolib-open-beta-a-new-lorawan-v1-1-stack/65534 "2025-04-15T06:09:59Z")
Hi there TTN community, We present you a new LoRaWAN stack, as of now in open beta: RadioLib! (GitHub - jgromes/RadioLib: Universal wireless communication library for embedded devices) After countless hours of work du… --- ## [LoRaWAN Network Join failed - ERR\_INVALID\_FREQUENCY (-12)](https://www.thethingsnetwork.org/forum/t/lorawan-network-join-failed-err-invalid-frequency-12/71110)
**Author:** [@wint0178](https://www.thethingsnetwork.org/forum/u/wint0178)\ **Replies:** 2\ **Last updated:** [April 8, 2025, 7:43pm UTC](https://www.thethingsnetwork.org/forum/t/lorawan-network-join-failed-err-invalid-frequency-12/71110 "2025-04-08T19:43:01Z")
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 all setup correctly… --- ## [Join accepted but nothing else](https://www.thethingsnetwork.org/forum/t/join-accepted-but-nothing-else/70996)
**Author:** [@fweijers](https://www.thethingsnetwork.org/forum/u/fweijers)\ **Replies:** 15\ **Last updated:** [April 2, 2025, 6:10pm UTC](https://www.thethingsnetwork.org/forum/t/join-accepted-but-nothing-else/70996 "2025-04-02T18:10:24Z")
Hi there I am using a Heltec CubeCell-Board（HTCC-AB01) I successfully sent a message to the TTN network, I see my message in the console but nothing afterwards (no webhook is called). According to CHATGPT my node cont… --- ## [Do I have to ReJoin after being out of range](https://www.thethingsnetwork.org/forum/t/do-i-have-to-rejoin-after-being-out-of-range/71049)
**Author:** [@micheldemeester](https://www.thethingsnetwork.org/forum/u/micheldemeester)\ **Replies:** 1\ **Last updated:** [April 1, 2025, 12:57pm UTC](https://www.thethingsnetwork.org/forum/t/do-i-have-to-rejoin-after-being-out-of-range/71049 "2025-04-01T12:57:50Z")
Hello All, I am developing an GPS based data tracker with a WioE5 module to sent battery voltages, temperatures etc. to a NodeRed dashboard. My question, do I have to rejoin the TTN network after being out of range or … --- ## [Transfert data sanbox to industrie](https://www.thethingsnetwork.org/forum/t/transfert-data-sanbox-to-industrie/71048)
**Author:** [@xunk](https://www.thethingsnetwork.org/forum/u/xunk)\ **Replies:** 0\ **Last updated:** [March 31, 2025, 7:30pm UTC](https://www.thethingsnetwork.org/forum/t/transfert-data-sanbox-to-industrie/71048 "2025-03-31T19:30:13Z")
I’m having a technical problem; perhaps you can help me. Currently, all my data (gateway, applications, end-device) is located in The Things Network Console. I have a console on thethingindustrie: https://xxxx.eu1.clou… --- ## [How does an end device know which frequency a downlink will be on?](https://www.thethingsnetwork.org/forum/t/how-does-an-end-device-know-which-frequency-a-downlink-will-be-on/71037)
**Author:** [@ElectronicallyE](https://www.thethingsnetwork.org/forum/u/ElectronicallyE)\ **Replies:** 4\ **Last updated:** [March 31, 2025, 10:57am UTC](https://www.thethingsnetwork.org/forum/t/how-does-an-end-device-know-which-frequency-a-downlink-will-be-on/71037 "2025-03-31T10:57:26Z")
Reviewing https://www.thethingsnetwork.org/docs/lorawan/frequency-plans/, I see that The Things Network uses 9 uplink (“up to gateway”) (8 usable) channels and 8 downlink (“down to sensor”) channels (channel 1 and 9 are … --- ## [TrackerD - no JoinAccept](https://www.thethingsnetwork.org/forum/t/trackerd-no-joinaccept/62878)
**Author:** [@eolson2](https://www.thethingsnetwork.org/forum/u/eolson2)\ **Replies:** 11\ **Last updated:** [March 24, 2025, 5:48pm UTC](https://www.thethingsnetwork.org/forum/t/trackerd-no-joinaccept/62878 "2025-03-24T17:48:38Z")
Having difficulty connecting a TrackerD to TTN. Had success with a LSN50 v2. Using the LPS8N gateway. Here’s what’s showing up in HTerm: 57682195: EV\_JOIN\_TXCOMPLETE: no JoinAccept\<\\r\>\<\\n\> 58450102: EV\_TXSTART\<\\r\>\<\\… --- ## [AVR128DB28 PCB with RFM95](https://www.thethingsnetwork.org/forum/t/avr128db28-pcb-with-rfm95/50864)
**Author:** [@tomtor](https://www.thethingsnetwork.org/forum/u/tomtor)\ **Replies:** 6\ **Last updated:** [March 22, 2025, 5:32am UTC](https://www.thethingsnetwork.org/forum/t/avr128db28-pcb-with-rfm95/50864 "2025-03-22T05:32:29Z")
I made a PCB for the STM32 about 4 years ago: https://www.thethingsnetwork.org/labs/story/a-cheap-stm32-arduino-node, but because these boards are hard to get nowadays I recently designed a PCB with the AVR128DB28. These… --- ## [Any one knows for support for heltec\_wifi\_lora\_32\_V3?](https://www.thethingsnetwork.org/forum/t/any-one-knows-for-support-for-heltec-wifi-lora-32-v3/64068)
**Author:** [@idealumesh](https://www.thethingsnetwork.org/forum/u/idealumesh)\ **Replies:** 10\ **Last updated:** [March 20, 2025, 3:40pm UTC](https://www.thethingsnetwork.org/forum/t/any-one-knows-for-support-for-heltec-wifi-lora-32-v3/64068 "2025-03-20T15:40:52Z")
I tried with V2 LMIC on V3 board ( heltec\_wifi\_lora\_32\_V3) it did not worked. Any help will be appreciated --- ## [Join-request failed - Tracker T1000-A/B](https://www.thethingsnetwork.org/forum/t/join-request-failed-tracker-t1000-a-b/70907)
**Author:** [@ggcabrerab](https://www.thethingsnetwork.org/forum/u/ggcabrerab)\ **Replies:** 0\ **Last updated:** [March 16, 2025, 8:32pm UTC](https://www.thethingsnetwork.org/forum/t/join-request-failed-tracker-t1000-a-b/70907 "2025-03-16T20:32:17Z")
I have configured an LPS8-V2 LoRaWAN gateway with the TTN platform. When pairing the SenseCAP Tracker T1000-A/B device, I get the following error: Join-request to cluster-local Join Server failed DevNonce is too small. … --- ## [LoRa Plus(tm) - Next Gen LoRa announced](https://www.thethingsnetwork.org/forum/t/lora-plus-tm-next-gen-lora-announced/70851)
**Author:** [@Jeff-UK](https://www.thethingsnetwork.org/forum/u/Jeff-UK)\ **Replies:** 0\ **Last updated:** [March 11, 2025, 12:08am UTC](https://www.thethingsnetwork.org/forum/t/lora-plus-tm-next-gen-lora-announced/70851 "2025-03-11T00:08:53Z")
Semtech has announced the next release of LoRa tranceiver technology with the release of LoRa Plus™ LR2021. Details here: --- ## [Problem with delivering messages from gateway to applicaton](https://www.thethingsnetwork.org/forum/t/problem-with-delivering-messages-from-gateway-to-applicaton/70793)
**Author:** [@netmaniac](https://www.thethingsnetwork.org/forum/u/netmaniac)\ **Replies:** 7\ **Last updated:** [March 10, 2025, 2:23pm UTC](https://www.thethingsnetwork.org/forum/t/problem-with-delivering-messages-from-gateway-to-applicaton/70793 "2025-03-10T14:23:28Z")
I write software for sensor sending data through TTN. It uses GitHub - beegee-tokyo/SX126x-Arduino: Arduino library to use Semtech SX126x LoRa chips and modules to communicate. It joins via OTAA and it works as expected.… --- ## [ESP32, rfm95w, deep sleep. How to save and restore OTAA Session?](https://www.thethingsnetwork.org/forum/t/esp32-rfm95w-deep-sleep-how-to-save-and-restore-otaa-session/70698)
**Author:** [@hrabbe](https://www.thethingsnetwork.org/forum/u/hrabbe)\ **Replies:** 3\ **Last updated:** [February 27, 2025, 11:58pm UTC](https://www.thethingsnetwork.org/forum/t/esp32-rfm95w-deep-sleep-how-to-save-and-restore-otaa-session/70698 "2025-02-27T23:58:15Z")
Hi Im trying to get my device to not do an OTAA join every time it wakes up from deep sleep. Im aware there is some topics in the forum on the same subject but I find it difficult to understand how I can implement this … --- ## [Need Dragino LTC2 payload formatter V1.4?](https://www.thethingsnetwork.org/forum/t/need-dragino-ltc2-payload-formatter-v1-4/70705)
**Author:** [@sensoradmintt](https://www.thethingsnetwork.org/forum/u/sensoradmintt)\ **Replies:** 0\ **Last updated:** [February 26, 2025, 6:31pm UTC](https://www.thethingsnetwork.org/forum/t/need-dragino-ltc2-payload-formatter-v1-4/70705 "2025-02-26T18:31:30Z")
have 2 of them and they will not show me correct TEMP Data with the paylload decoder from Github. from The Repository it show’s the correct temp-Data BUT not MIN/MAX…any Idea ? tks in advance Herbert --- ## [How to use T-Beam V.1.2?](https://www.thethingsnetwork.org/forum/t/how-to-use-t-beam-v-1-2/70660)
**Author:** [@Somsak](https://www.thethingsnetwork.org/forum/u/Somsak)\ **Replies:** 1\ **Last updated:** [February 22, 2025, 9:20am UTC](https://www.thethingsnetwork.org/forum/t/how-to-use-t-beam-v-1-2/70660 "2025-02-22T09:20:01Z")
I have TTGO T-Beam v.1.2 as ESP32+SX1276. Has anyone ever been able to use it with MCCI Lmic library to connect to TTN? And how to add a Board into the Arduino IDE? Pin Mapping that is required, does it use any GPIO li… --- ## [LMIC-node | One example to rule them all](https://www.thethingsnetwork.org/forum/t/lmic-node-one-example-to-rule-them-all/46964)
**Author:** [@bluejedi](https://www.thethingsnetwork.org/forum/u/bluejedi)\ **Replies:** 75\ **Last updated:** [February 21, 2025, 2:23pm UTC](https://www.thethingsnetwork.org/forum/t/lmic-node-one-example-to-rule-them-all/46964 "2025-02-21T14:23:45Z")
LMIC-node LMIC-node is an example LoRaWAN application for a node for The Things Network. It uses the Arduino framework, the LMIC LoRaWAN library and PlatformIO. With LMIC-node it is easy to get a working node quickly u… --- ## [Dragino LA66 LoRaWan AT COMANDs](https://www.thethingsnetwork.org/forum/t/dragino-la66-lorawan-at-comands/70617)
**Author:** [@wollacebomfim](https://www.thethingsnetwork.org/forum/u/wollacebomfim)\ **Replies:** 6\ **Last updated:** [February 20, 2025, 5:52pm UTC](https://www.thethingsnetwork.org/forum/t/dragino-la66-lorawan-at-comands/70617 "2025-02-20T17:52:21Z")
Good morning everyone, I have a problem, I need to know the rssi and snr of the package sent by the LoRaWan Shield LA66 + Arduino via AT\_COMANDS which are AT+SNR=? /AT+RSSI=?, but both return 0, is it possible to check t… --- ## [RFM95 Frequency 868 vs 915 Mhz](https://www.thethingsnetwork.org/forum/t/rfm95-frequency-868-vs-915-mhz/70610)
**Author:** [@snatch](https://www.thethingsnetwork.org/forum/u/snatch)\ **Replies:** 2\ **Last updated:** [February 17, 2025, 11:25am UTC](https://www.thethingsnetwork.org/forum/t/rfm95-frequency-868-vs-915-mhz/70610 "2025-02-17T11:25:58Z")
I’ve ordered RFM95 868Mhz module from Ali (The module is marked on the backside with 868). It is connected to ESP32-C3. I’m using LMIC lib from mcci-catena/MCCI LoRaWAN LMIC library@^5.0.1 The problem is that it uses … --- ## [Not able to receive data using ABP](https://www.thethingsnetwork.org/forum/t/not-able-to-receive-data-using-abp/68074)
**Author:** [@sasmosaw](https://www.thethingsnetwork.org/forum/u/sasmosaw)\ **Replies:** 28\ **Last updated:** [February 17, 2025, 12:22am UTC](https://www.thethingsnetwork.org/forum/t/not-able-to-receive-data-using-abp/68074 "2025-02-17T00:22:32Z")
Summary Hello! I’m currently to send data to a TTSS application trough ABP activation. Currently is not possible for me to do an OTAA activation for reasons that are currently being solved, eventually, it will, but in… --- ## [SX1276 RegOpMode register - cant change mode](https://www.thethingsnetwork.org/forum/t/sx1276-regopmode-register-cant-change-mode/18455)
**Author:** [@xsimonm](https://www.thethingsnetwork.org/forum/u/xsimonm)\ **Replies:** 14\ **Last updated:** [February 15, 2025, 11:54pm UTC](https://www.thethingsnetwork.org/forum/t/sx1276-regopmode-register-cant-change-mode/18455 "2025-02-15T23:54:39Z")
Hi, I am struggling to get the SX1276 radio module in different kind of modes. No matter what I do, the mode will only be in sleep mode. I can change between LoRa and FSK/OOK Mode, but when I write 0x81 for LoRa mode … --- ## [Noob - Setting up Axioma Qalcosonic E3 Heat Monitor device - all preconfigured!](https://www.thethingsnetwork.org/forum/t/noob-setting-up-axioma-qalcosonic-e3-heat-monitor-device-all-preconfigured/38554)
**Author:** [@YouGenerate](https://www.thethingsnetwork.org/forum/u/YouGenerate)\ **Replies:** 35\ **Last updated:** [February 10, 2025, 4:13pm UTC](https://www.thethingsnetwork.org/forum/t/noob-setting-up-axioma-qalcosonic-e3-heat-monitor-device-all-preconfigured/38554 "2025-02-10T16:13:18Z")
Hi All, Just joined so very very green on all this, sorry if its a noob question! I am trying to setup and register a heat monitor (measures kWh of heat produced by a gas combi) which I have been assured is LoRaWan com… --- ## [Zenner Water Meter "Problems"](https://www.thethingsnetwork.org/forum/t/zenner-water-meter-problems/59648)
**Author:** [@0815](https://www.thethingsnetwork.org/forum/u/0815)\ **Replies:** 20\ **Last updated:** [January 27, 2025, 2:46pm UTC](https://www.thethingsnetwork.org/forum/t/zenner-water-meter-problems/59648 "2025-01-27T14:46:20Z")
Good morning. Last week I installed three brand new Water meters from the company Zenner with an EDC Lorawan Module in my basement (concrete). After I received the Keys I registered them inside TTN. Everything looke… --- ## [Ebyte E78-868LN22S](https://www.thethingsnetwork.org/forum/t/ebyte-e78-868ln22s/70144)
**Author:** [@jochenstromberg](https://www.thethingsnetwork.org/forum/u/jochenstromberg)\ **Replies:** 10\ **Last updated:** [January 22, 2025, 5:19am UTC](https://www.thethingsnetwork.org/forum/t/ebyte-e78-868ln22s/70144 "2025-01-22T05:19:01Z")
Hi there, i got some Ebyte E78-868LN22S SW Version 4.0, the datasheet seems to be older than the firmware… I tried to set it up in a german lorawan so 868MHz, in both methods OTAA / ABP. Nothing to see in my console fo… --- ## [LT-22222-L spreading factor?](https://www.thethingsnetwork.org/forum/t/lt-22222-l-spreading-factor/70340)
**Author:** [@vish2025](https://www.thethingsnetwork.org/forum/u/vish2025)\ **Replies:** 1\ **Last updated:** [January 15, 2025, 3:18pm UTC](https://www.thethingsnetwork.org/forum/t/lt-22222-l-spreading-factor/70340 "2025-01-15T15:18:41Z")
Hey everyone, I’m trying to figure out how to tune the spreading factor on the Dragino LT-22222-L I/O controller. Here’s the official documentation - there’s no mention of spreading factor or how one adjusts SF. Thanks… --- ## [ESP32 + RFM95W + 9DOF + Deep Sleep](https://www.thethingsnetwork.org/forum/t/esp32-rfm95w-9dof-deep-sleep/70294)
**Author:** [@leon\_12098](https://www.thethingsnetwork.org/forum/u/leon_12098)\ **Replies:** 14\ **Last updated:** [January 14, 2025, 12:26pm UTC](https://www.thethingsnetwork.org/forum/t/esp32-rfm95w-9dof-deep-sleep/70294 "2025-01-14T12:26:53Z")
Hello everyone, I have developed a LoRaWAN sensor that transmits its data to TTN . The hardware is based on a ESP board. The software for the sensor is written using the Arduino IDE and is based on the LMIC library. Whe… --- ## [Problem With WakeUp on External for Heltec ESP32 v2](https://www.thethingsnetwork.org/forum/t/problem-with-wakeup-on-external-for-heltec-esp32-v2/33654)
**Author:** [@hcfk](https://www.thethingsnetwork.org/forum/u/hcfk)\ **Replies:** 6\ **Last updated:** [January 7, 2025, 3:49pm UTC](https://www.thethingsnetwork.org/forum/t/problem-with-wakeup-on-external-for-heltec-esp32-v2/33654 "2025-01-07T15:49:40Z")
I am writing a simple code on Heltec ESP32 v2 board and want to make it deep sleep till an external signal got from PIR. For this GPIO\_NUM\_27 pin as input. But the problem is although the pir is not connected to the pi… --- ## [Recovering Base Station Credentials](https://www.thethingsnetwork.org/forum/t/recovering-base-station-credentials/70219)
**Author:** [@j-eisenbrandt-vb](https://www.thethingsnetwork.org/forum/u/j-eisenbrandt-vb)\ **Replies:** 0\ **Last updated:** [January 2, 2025, 4:01pm UTC](https://www.thethingsnetwork.org/forum/t/recovering-base-station-credentials/70219 "2025-01-02T16:01:17Z")
I have a multitech gateway that was added to my actility network some time ago by someone that is no longer on my team. I would like to access the gateway via ssh, but the password that I have is incorrect. Is there a wa… --- ## [End nodes mismatch](https://www.thethingsnetwork.org/forum/t/end-nodes-mismatch/70192)
**Author:** [@tim-fiss](https://www.thethingsnetwork.org/forum/u/tim-fiss)\ **Replies:** 10\ **Last updated:** [December 31, 2024, 10:32am UTC](https://www.thethingsnetwork.org/forum/t/end-nodes-mismatch/70192 "2024-12-31T10:32:48Z")
tl;dr: two devices where assigned the same dev\_addr, device A went offline, device B’s uplinks started being sent to our backend as if they were device A, until device A intiated a rejoin and both devices returned to nor… --- ## [Help: NRF52840 Sense - RFM95W - LMIC Library / TTNV3](https://www.thethingsnetwork.org/forum/t/help-nrf52840-sense-rfm95w-lmic-library-ttnv3/51461)
**Author:** [@SparkCog](https://www.thethingsnetwork.org/forum/u/SparkCog)\ **Replies:** 3\ **Last updated:** [December 30, 2024, 6:31pm UTC](https://www.thethingsnetwork.org/forum/t/help-nrf52840-sense-rfm95w-lmic-library-ttnv3/51461 "2024-12-30T18:31:02Z")
Hello, I’m trying to build a sensor node with lora to work with TTN for an outdoor application. The Adafruit NRF52840 Sense (4516) is fantastic for its integration of all the sensors; makes for a very clean and compact … [Previous page](https://www.thethingsnetwork.org/forum/c/nodes/7.md?no_subcategories=false&page=1) [Next page](https://www.thethingsnetwork.org/forum/c/nodes/7.md?no_subcategories=false&page=3)