# LoRaWAN Discussions **URL:** https://www.thethingsnetwork.org/forum/c/lorawan/lorawan-discussions/87.md?page=1 [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:** 2 --- ## [No Schedule join-accept downlink after successfully processed join request!](https://www.thethingsnetwork.org/forum/t/no-schedule-join-accept-downlink-after-successfully-processed-join-request/52332)
**Author:** [@Smartyou](https://www.thethingsnetwork.org/forum/u/Smartyou)\ **Replies:** 12\ **Last updated:** [December 21, 2021, 12:16pm UTC](https://www.thethingsnetwork.org/forum/t/no-schedule-join-accept-downlink-after-successfully-processed-join-request/52332 "2021-12-21T12:16:13Z")
Hi, I’m facing an issue with one of my node (mclimate CO2). When node try to join, TTN accept join request, successfuly process it, but no dowlink “join-accept” is scheduled. When I try to join with my Adeunis tester,… --- ## [Help Understanding Semtech Packet Forwarder Configuration](https://www.thethingsnetwork.org/forum/t/help-understanding-semtech-packet-forwarder-configuration/52298)
**Author:** [@iamatesla](https://www.thethingsnetwork.org/forum/u/iamatesla)\ **Replies:** 2\ **Last updated:** [October 12, 2021, 7:41am UTC](https://www.thethingsnetwork.org/forum/t/help-understanding-semtech-packet-forwarder-configuration/52298 "2021-10-12T07:41:56Z")
I’m wondering how a LoRaWAN gateway could be used to transmit a packet on any 1 of 8 channels instead of 1 of 4 channels? I’m trying to understand a LoRaWAN network I came across that is transmitting data using 8 channel… --- ## [LoRaWAN packet decoder in PHP](https://www.thethingsnetwork.org/forum/t/lorawan-packet-decoder-in-php/47873)
**Author:** [@iot-payload](https://www.thethingsnetwork.org/forum/u/iot-payload)\ **Replies:** 1\ **Last updated:** [September 26, 2021, 7:22pm UTC](https://www.thethingsnetwork.org/forum/t/lorawan-packet-decoder-in-php/47873 "2021-09-26T19:22:47Z")
Good morning, kindly ask if anyone has developed a lorawan packet decoder in PHP code. I own this data; PHYPayload FRMPayload NwkSKey AppSKey I can’t use the java decoder on the net on a public site. I need to de… --- ## [ChirpStack open-source LoRaWAN® Network Server difference to TTS?](https://www.thethingsnetwork.org/forum/t/chirpstack-open-source-lorawan-network-server-difference-to-tts/51629)
**Author:** [@E\_T](https://www.thethingsnetwork.org/forum/u/E_T)\ **Replies:** 2\ **Last updated:** [September 18, 2021, 9:43am UTC](https://www.thethingsnetwork.org/forum/t/chirpstack-open-source-lorawan-network-server-difference-to-tts/51629 "2021-09-18T09:43:33Z")
Hello, has anyone some experience with ChirpStack? ChirpStack open-source LoRaWAN® Network Server Greeting E\_T --- ## [New working with Lora using 433Mhz of frequency](https://www.thethingsnetwork.org/forum/t/new-working-with-lora-using-433mhz-of-frequency/31288)
**Author:** [@libiaromero](https://www.thethingsnetwork.org/forum/u/libiaromero)\ **Replies:** 9\ **Last updated:** [August 11, 2021, 9:27pm UTC](https://www.thethingsnetwork.org/forum/t/new-working-with-lora-using-433mhz-of-frequency/31288 "2021-08-11T21:27:45Z")
I have started working with Lora a few days ago with the Dragino Kit V2 433MHz. I configured the Gateway and the conection with wifi, the present state is “connected”. Programming an example from the manual of dragino … --- ## [Gateway Downlink Queue Management with V3 and Packet Broker](https://www.thethingsnetwork.org/forum/t/gateway-downlink-queue-management-with-v3-and-packet-broker/43998)
**Author:** [@cslorabox](https://www.thethingsnetwork.org/forum/u/cslorabox)\ **Replies:** 4\ **Last updated:** [May 22, 2021, 7:18pm UTC](https://www.thethingsnetwork.org/forum/t/gateway-downlink-queue-management-with-v3-and-packet-broker/43998 "2021-05-22T19:18:45Z")
My understanding is that V3 increases all RX windows to at least 5 seconds, and Packet Broker effectively allows routing of traffic from a given gateway to multiple network server stack instances. That leaves me curious… --- ## [Non Line-of-Sight Propagation](https://www.thethingsnetwork.org/forum/t/non-line-of-sight-propagation/46949)
**Author:** [@hphillip](https://www.thethingsnetwork.org/forum/u/hphillip)\ **Replies:** 5\ **Last updated:** [April 23, 2021, 11:22am UTC](https://www.thethingsnetwork.org/forum/t/non-line-of-sight-propagation/46949 "2021-04-23T11:22:53Z")
I’ve become accustomed to LoRa reception being more or less line of sight at 868 Mhz and websites like https://www.heywhatsthat.com/ being very useful to get an idea of the potential coverage area from a gateway. At leas… --- ## [V2 Console broken?](https://www.thethingsnetwork.org/forum/t/v2-console-broken/46687)
**Author:** [@IoT\_Marco](https://www.thethingsnetwork.org/forum/u/IoT_Marco)\ **Replies:** 12\ **Last updated:** [April 14, 2021, 5:40pm UTC](https://www.thethingsnetwork.org/forum/t/v2-console-broken/46687 "2021-04-14T17:40:23Z")
I can’t imagine yesterday’s v3 update affecting the v2 Console but I don’t see any data traffic on 3 gateways anymore. Is there something wrong with the v2 Console? --- ## [Filter forwarded packets if on limited cellular plan](https://www.thethingsnetwork.org/forum/t/filter-forwarded-packets-if-on-limited-cellular-plan/42730)
**Author:** [@alpu](https://www.thethingsnetwork.org/forum/u/alpu)\ **Replies:** 23\ **Last updated:** [January 22, 2021, 8:25pm UTC](https://www.thethingsnetwork.org/forum/t/filter-forwarded-packets-if-on-limited-cellular-plan/42730 "2021-01-22T20:25:35Z")
If you have a gateway that runs on limited/expensive data plan over 2/3/4g, you might want to limit forwarding traffic from nodes that are not yours, when deployed as a “private” gateway, even when this is a little bit n… --- ## [Compression strategies for LoRaWAN packets](https://www.thethingsnetwork.org/forum/t/compression-strategies-for-lorawan-packets/42452)
**Author:** [@MedadNewman](https://www.thethingsnetwork.org/forum/u/MedadNewman)\ **Replies:** 29\ **Last updated:** [January 9, 2021, 5:15am UTC](https://www.thethingsnetwork.org/forum/t/compression-strategies-for-lorawan-packets/42452 "2021-01-09T05:15:25Z")
In my application, I want to fit as much data into a LoRaWAN packet as possible. I am willing to send a 100 byte payload. However, I want to fit as much data in that packet as possible. The question is: How can I carry … --- ## [The TTN port](https://www.thethingsnetwork.org/forum/t/the-ttn-port/41943)
**Author:** [@MurdochUniversity-HB](https://www.thethingsnetwork.org/forum/u/MurdochUniversity-HB)\ **Replies:** 3\ **Last updated:** [December 7, 2020, 10:57am UTC](https://www.thethingsnetwork.org/forum/t/the-ttn-port/41943 "2020-12-07T10:57:20Z")
Hi, I am just wondering how the TTN port gets assigned. As you can see in the image below. zr2 is on port 1 and lopy4 is on port 2. Ideally, it would be nice to just be able to manually assign everything within an appli… --- ## [How to send M-Bus over LoRa to Modbus RTU](https://www.thethingsnetwork.org/forum/t/how-to-send-m-bus-over-lora-to-modbus-rtu/37734)
**Author:** [@danieltay89](https://www.thethingsnetwork.org/forum/u/danieltay89)\ **Replies:** 5\ **Last updated:** [December 6, 2020, 8:50am UTC](https://www.thethingsnetwork.org/forum/t/how-to-send-m-bus-over-lora-to-modbus-rtu/37734 "2020-12-06T08:50:48Z")
Hi All, I am from Singapore and I believe we use 920 MHz over here. We sell some M-Bus devices; in my industry, it is common to use Modbus RTU as the signal input for DDC controllers, we normally do this by looping all… --- ## [Gateway downlinking on the wrong frequency](https://www.thethingsnetwork.org/forum/t/gateway-downlinking-on-the-wrong-frequency/41274)
**Author:** [@MurdochUniversity-HB](https://www.thethingsnetwork.org/forum/u/MurdochUniversity-HB)\ **Replies:** 2\ **Last updated:** [November 12, 2020, 3:07am UTC](https://www.thethingsnetwork.org/forum/t/gateway-downlinking-on-the-wrong-frequency/41274 "2020-11-12T03:07:33Z")
Hi, We have 3 active gateways and are using the AU915 band in Australia. We are seeing the one of our Cisco LoRaWAN gateways downlinking on the 869 MHz band. I am seeing this through TTN console Does anyone have any … --- ## [Tropospheric Ducting observations at 968Mhz?](https://www.thethingsnetwork.org/forum/t/tropospheric-ducting-observations-at-968mhz/41035)
**Author:** [@hphillip](https://www.thethingsnetwork.org/forum/u/hphillip)\ **Replies:** 7\ **Last updated:** [November 6, 2020, 3:44pm UTC](https://www.thethingsnetwork.org/forum/t/tropospheric-ducting-observations-at-968mhz/41035 "2020-11-06T15:44:02Z")
I, probably like other folk, have a simple MQTT task monitoring a regular SF7 heartbeat from a relatively local fixed node against my gateway of interest. In the event the gateway goes off-air my task can simply notify m… --- ## [Lorawan In High Rise Buildings](https://www.thethingsnetwork.org/forum/t/lorawan-in-high-rise-buildings/40958)
**Author:** [@Gianpaul](https://www.thethingsnetwork.org/forum/u/Gianpaul)\ **Replies:** 7\ **Last updated:** [November 2, 2020, 11:30am UTC](https://www.thethingsnetwork.org/forum/t/lorawan-in-high-rise-buildings/40958 "2020-11-02T11:30:27Z")
Hello All, I have been doing some research with regards to smart buildings, specifically high rise residential buildings. We are offering leak sensors to our high rise residential clientele and from what I gather, it s… --- ## [Activation being ignored](https://www.thethingsnetwork.org/forum/t/activation-being-ignored/38798)
**Author:** [@logeait](https://www.thethingsnetwork.org/forum/u/logeait)\ **Replies:** 4\ **Last updated:** [July 28, 2020, 8:32am UTC](https://www.thethingsnetwork.org/forum/t/activation-being-ignored/38798 "2020-07-28T08:32:54Z")
I configured a gateway and single device. tested then deployed to the field. It ran beautifully for about four weeks then started ignoring packets. Went on site and reset device and gateway. Can see the activation coming… --- ## [Lora parameters limitation in IN865](https://www.thethingsnetwork.org/forum/t/lora-parameters-limitation-in-in865/38282)
**Author:** [@LoRa\_IOT](https://www.thethingsnetwork.org/forum/u/LoRa_IOT)\ **Replies:** 1\ **Last updated:** [July 3, 2020, 9:19am UTC](https://www.thethingsnetwork.org/forum/t/lora-parameters-limitation-in-in865/38282 "2020-07-03T09:19:13Z")
Hello, I am from India and want to use Lora but before that, I want to know a few things about bandwidth, tx power. I am using region IN865. I can use from any of these bands 125kHz, 250kHz, 500kHz, right? Is there a… --- ## [Discussion about range and non-ACK protocol stack](https://www.thethingsnetwork.org/forum/t/discussion-about-range-and-non-ack-protocol-stack/37504)
**Author:** [@bubba198](https://www.thethingsnetwork.org/forum/u/bubba198)\ **Replies:** 6\ **Last updated:** [June 3, 2020, 6:16am UTC](https://www.thethingsnetwork.org/forum/t/discussion-about-range-and-non-ack-protocol-stack/37504 "2020-06-03T06:16:24Z")
Hey guys, I am setting the stage here for a big picture question about reliability and true, real non-anecdotal RF range: I’ve been a HAM since the early 90s and that was the golden age of packet. Aside from the AX.25 … --- ## [Weird message delay on April the 5th (AS923 - Melbourne, Australia)](https://www.thethingsnetwork.org/forum/t/weird-message-delay-on-april-the-5th-as923-melbourne-australia/36830)
**Author:** [@fcherqui](https://www.thethingsnetwork.org/forum/u/fcherqui)\ **Replies:** 1\ **Last updated:** [May 8, 2020, 10:16am UTC](https://www.thethingsnetwork.org/forum/t/weird-message-delay-on-april-the-5th-as923-melbourne-australia/36830 "2020-05-08T10:16:53Z")
Hi all, I hope I’m posting in the correct category. I’ve never post before because I’ve always find my answers in previous post, thanks to you guys! But not this time… In short, I’ve experienced that messages have been… --- ## [Switching gateway](https://www.thethingsnetwork.org/forum/t/switching-gateway/36533)
**Author:** [@latzer](https://www.thethingsnetwork.org/forum/u/latzer)\ **Replies:** 2\ **Last updated:** [April 28, 2020, 6:36am UTC](https://www.thethingsnetwork.org/forum/t/switching-gateway/36533 "2020-04-28T06:36:40Z")
Hi all I might have a basic question I didn’t found the answer googling. Does a node switch between gateways in other words is a tracker node bound to a gateway when it joined the network or does it hop to the next “best… --- ## [Range between Lora to LoRa and LoRa to Gateway](https://www.thethingsnetwork.org/forum/t/range-between-lora-to-lora-and-lora-to-gateway/35983)
**Author:** [@circuitdigest](https://www.thethingsnetwork.org/forum/u/circuitdigest)\ **Replies:** 5\ **Last updated:** [April 9, 2020, 11:51am UTC](https://www.thethingsnetwork.org/forum/t/range-between-lora-to-lora-and-lora-to-gateway/35983 "2020-04-09T11:51:06Z")
Hi, Let’s say I have a LoRa End Device communicating with a Gateway at a particular distance. Now if I remove the Gateway and replace it with another LoRa End Device. Then change the firmware for P2P communication will … --- ## [Node credentials accidentally invalidated, any possibility to force re-join?](https://www.thethingsnetwork.org/forum/t/node-credentials-accidentally-invalidated-any-possibility-to-force-re-join/34328)
**Author:** [@Kater](https://www.thethingsnetwork.org/forum/u/Kater)\ **Replies:** 4\ **Last updated:** [February 12, 2020, 5:42pm UTC](https://www.thethingsnetwork.org/forum/t/node-credentials-accidentally-invalidated-any-possibility-to-force-re-join/34328 "2020-02-12T17:42:36Z")
Hi, we have one node out in the field which worked well so far. Then, in our lab, we accidentally provisioned another node with the same credentials and let it do a join. This of course invalidated the session keys of th… --- ## [TimeStamp Issue - Join Request and Accept Work - Packet Rejected Timestamp Wrong](https://www.thethingsnetwork.org/forum/t/timestamp-issue-join-request-and-accept-work-packet-rejected-timestamp-wrong/33644)
**Author:** [@harveyben](https://www.thethingsnetwork.org/forum/u/harveyben)\ **Replies:** 21\ **Last updated:** [February 4, 2020, 6:16pm UTC](https://www.thethingsnetwork.org/forum/t/timestamp-issue-join-request-and-accept-work-packet-rejected-timestamp-wrong/33644 "2020-02-04T18:16:12Z")
Hello, This is my first post on the TTN forum. I am not a LoRa or TTN expert. I have searched the forum and found two similar posts here and here. The posts are interesting but neither offer a clear solution I can impl… --- ## [GPS Tracking with Lora and display on mobile application](https://www.thethingsnetwork.org/forum/t/gps-tracking-with-lora-and-display-on-mobile-application/33612)
**Author:** [@Ryuzen](https://www.thethingsnetwork.org/forum/u/Ryuzen)\ **Replies:** 8\ **Last updated:** [February 4, 2020, 11:45am UTC](https://www.thethingsnetwork.org/forum/t/gps-tracking-with-lora-and-display-on-mobile-application/33612 "2020-02-04T11:45:54Z")
Hello everyone. I have some question. How do i sent my position data that receive from gps module and display on my mobile application. I think i will connect lora device with gps module and arduino board and then send… --- ## [LoRa specifications, variing definitions of DevAddr](https://www.thethingsnetwork.org/forum/t/lora-specifications-variing-definitions-of-devaddr/33853)
**Author:** [@joaumms](https://www.thethingsnetwork.org/forum/u/joaumms)\ **Replies:** 3\ **Last updated:** [January 30, 2020, 7:26pm UTC](https://www.thethingsnetwork.org/forum/t/lora-specifications-variing-definitions-of-devaddr/33853 "2020-01-30T19:26:08Z")
Hi, right now LoRa 1.0.3 and 1.1 are published as well as LoRa backend interfaces v1.0: https://lora-alliance.org/sites/default/files/2018-07/lorawan1.0.3.pdf https://lora-alliance.org/sites/default/files/2018-04/lora… --- ## [Lora Frequency 868MHZ for Military use in ITaly?](https://www.thethingsnetwork.org/forum/t/lora-frequency-868mhz-for-military-use-in-italy/18325)
**Author:** [@Lenz82](https://www.thethingsnetwork.org/forum/u/Lenz82)\ **Replies:** 8\ **Last updated:** [January 29, 2020, 9:09am UTC](https://www.thethingsnetwork.org/forum/t/lora-frequency-868mhz-for-military-use-in-italy/18325 "2020-01-29T09:09:08Z")
Hello, Is it true that the LORA Alliance is looking for guidelines in the Italian market because the military wants to claim the 868 frequency? Online i can´t find something… someone has heard or seen siomething like t… --- ## [ABP authenticate method as strategy for private networks / rural areas](https://www.thethingsnetwork.org/forum/t/abp-authenticate-method-as-strategy-for-private-networks-rural-areas/33337)
**Author:** [@tom-iotexperts](https://www.thethingsnetwork.org/forum/u/tom-iotexperts)\ **Replies:** 2\ **Last updated:** [January 15, 2020, 12:00pm UTC](https://www.thethingsnetwork.org/forum/t/abp-authenticate-method-as-strategy-for-private-networks-rural-areas/33337 "2020-01-15T12:00:50Z")
Hi guys Perhaps you can help me think this through, a client of mine is installing sensors on single gateway deployments for agri-tech purposes. The gateways are on LTE backhaul and Solar power. So GW downtime and net… --- ## [What happens if someone does not follow the guidelines?](https://www.thethingsnetwork.org/forum/t/what-happens-if-someone-does-not-follow-the-guidelines/15298)
**Author:** [@marioz](https://www.thethingsnetwork.org/forum/u/marioz)\ **Replies:** 26\ **Last updated:** [December 10, 2019, 9:30pm UTC](https://www.thethingsnetwork.org/forum/t/what-happens-if-someone-does-not-follow-the-guidelines/15298 "2019-12-10T21:30:36Z")
Hello, the more you get in the topic, the more questions come up… What can be done if the neighbor sends every 2 seconds in SF12 on all channels? What happens when the frequencies are full / overloaded? Can someone lo… --- ## [Only activation, No uplinks downlink,ack received on TTN Console](https://www.thethingsnetwork.org/forum/t/only-activation-no-uplinks-downlink-ack-received-on-ttn-console/20867)
**Author:** [@amir\_sarla](https://www.thethingsnetwork.org/forum/u/amir_sarla)\ **Replies:** 16\ **Last updated:** [November 26, 2019, 6:27pm UTC](https://www.thethingsnetwork.org/forum/t/only-activation-no-uplinks-downlink-ack-received-on-ttn-console/20867 "2019-11-26T18:27:33Z")
Hello, We are making some Lora based device for US and stuck at some point. We are using Lora1276 module from NiceRF. We are using STM32L073 microcontroller and Lora1276 and sends data over TTN. We had used this micr… --- ## [Industrial IoT, low volume data transfer between two points (modbus)](https://www.thethingsnetwork.org/forum/t/industrial-iot-low-volume-data-transfer-between-two-points-modbus/31383)
**Author:** [@Rads](https://www.thethingsnetwork.org/forum/u/Rads)\ **Replies:** 1\ **Last updated:** [November 2, 2019, 3:17pm UTC](https://www.thethingsnetwork.org/forum/t/industrial-iot-low-volume-data-transfer-between-two-points-modbus/31383 "2019-11-02T15:17:26Z")
I’m trying to evaluate the options when trying to send IoT data between two sites. I have a low volume application that is considering modbus comms over a GSM VPN, but operating costs are high for such low volume data l… [Previous page](https://www.thethingsnetwork.org/forum/c/lorawan/lorawan-discussions/87.md) [Next page](https://www.thethingsnetwork.org/forum/c/lorawan/lorawan-discussions/87.md?page=2)