# Arduino nano and RFM95 basic test - EV\_JOIN\_TXCOMPLETE: no JoinAccept **URL:** \ **Category:** LMIC\ **Created:** [September 21, 2020, 7:08pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058 "2020-09-21T19:08:50Z")\ **Posts on this page:** 19\ **Page:** 8
**Author:** ![cslorabox](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/cslorabox/32/35697_2.png) [@cslorabox](https://www.thethingsnetwork.org/forum/u/cslorabox)\ **Post date:** [October 16, 2020, 12:04am UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/143 "2020-10-16T00:04:43Z")
Sorry, deleted that, it was to establish exactly what you were using, didn’t realize they were different repos. ---
**Author:** ![lorauser](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/lorauser/32/25844_2.png) [@lorauser](https://www.thethingsnetwork.org/forum/u/lorauser)\ **Post date:** [October 16, 2020, 12:07am UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/144 "2020-10-16T00:07:04Z")
I tested different versions of LMIC. I think the issue is not in the code and not in the hardware. ---
**Author:** ![cslorabox](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/cslorabox/32/35697_2.png) [@cslorabox](https://www.thethingsnetwork.org/forum/u/cslorabox)\ **Post date:** [October 16, 2020, 12:19am UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/145 "2020-10-16T00:19:10Z")
> [@lorauser](#): > > I think the issue is not in the code and not in the hardware. I think that is mistaken, unless you’re not within range of a gateway ---
**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\ **Post date:** [October 16, 2020, 8:32am UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/146 "2020-10-16T08:32:16Z")
Yes, I have several, but for the sake of choice, we’ll go with the RAK7246 Developer gateway - Pi based - so it’s easier to see what’s happening and make changes. Costs $99. Range is a tricky topic as it can be changed just by weather alone. As I’ve had to move house over summer I don’t have a proper external antenna and I’m in a metropolitan area so I’d expect there to be differences. But I have got ~1km from spots just above the house, a few hundred meters from down the road about 25m below the house and 6km if I go up the nearest big hill. In the rural area I had a moderate external antenna I could get 5km from a hill top with line of sight and 100m if I was behind the old mill house further down the hill from my office with no line of sight. Both used a Pro Mini device with helical antenna - which is the very worst of antenna’s AFAIK, but I’m not an RF engineer so I’ll let someone else comment. Longest connection I’ve had with LoRa to LoRa using a mag-mount antenna at the base station and the transmitter having just a short wire antenna with tin foil ground plane (high altitude balloon) was +100km. So as you can see, it’s complicated. Overall, despite any paranoia on your part, you can put some considerable trust in the TTNMapper. ---
**Author:** ![lorauser](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/lorauser/32/25844_2.png) [@lorauser](https://www.thethingsnetwork.org/forum/u/lorauser)\ **Post date:** [October 16, 2020, 8:52am UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/147 "2020-10-16T08:52:16Z")
Thanks for your distance experience. I have some ideas. Back to the last abp example sketch, it’s strange that in the code it sends each 60 seconds “hello world”, but in the console I see only one packet queued, like cycle stopped after 1 sending and waiting for response from TTN. I don’t see “EV\_TXCOMPLETE” . But with [previous library](https://github.com/matthijskooijman/arduino-lmic), I saw each 60 seconds new sendings. Is this normal? ---
**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\ **Post date:** [October 16, 2020, 12:51pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/148 "2020-10-16T12:51:10Z")
No, that’s not normal, it means the LMIC has crashed. So as I get older the more I doubt myself, so I’ve also checked the OTAA script over lunch as well as the ABP last night and that is working for me as well. Both uplinks and downlinks. I’ve tried it with my RAK7246 & a TTIG. Right now, I am what you call the `previous library` which is the only library I’ve recommended. Specifically, I’m using this branch: > **[matthijskooijman/arduino-lmic](https://github.com/matthijskooijman/arduino-lmic/tree/1.5.0+arduino-3)** > > :warning: This library is deprecated, see the README for alternatives. - matthijskooijman/arduino-lmic ---
**Author:** ![lorauser](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/lorauser/32/25844_2.png) [@lorauser](https://www.thethingsnetwork.org/forum/u/lorauser)\ **Post date:** [October 16, 2020, 3:21pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/149 "2020-10-16T15:21:16Z")
> [@descartes](#): > > which is the only library I’ve recommended Yes you recommended the only library but different versions, look: [This post](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/2) → Here the version is 1.5.1 [GitHub - matthijskooijman/arduino-lmic: ⚠ This library is deprecated, see the README for alternatives.](https://github.com/matthijskooijman/arduino-lmic) [Another post](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/137) → Here the version is 1.5.0+arduino-3 [GitHub - matthijskooijman/arduino-lmic at 1.5.0+arduino-3](https://github.com/matthijskooijman/arduino-lmic/tree/1.5.0+arduino-3) To avoid confusion, I’ve tested with both versions. version is 1.5.1 I see EV\_TXCOMPLETE version is 1.5.0+arduino-3 I don’t see EV\_TXCOMPLETE If you said “it means the LMIC has crashed.”, then I switch back to version 1.5.1 ---
**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\ **Post date:** [October 16, 2020, 3:25pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/150 "2020-10-16T15:25:40Z")
Whatever. I’ve retested my bread board setup with the version I last used, which is 1.5.0+arduino3, as there is only so much time I can put in to the forum, and it all worked fine. Maybe you could look at the TTN community gateways and see if you can contact an owner for help. Or migrate to the AdaFruit Feather M0 with RFM95. Or post it to me and I’ll have a look. ---
**Author:** ![lorauser](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/lorauser/32/25844_2.png) [@lorauser](https://www.thethingsnetwork.org/forum/u/lorauser)\ **Post date:** [October 16, 2020, 3:29pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/151 "2020-10-16T15:29:45Z")
On [https://ttnmapper.org/](https://ttnmapper.org/) I don’t see the frequency. Maybe switch to 433 and then to 915 ? ---
**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\ **Post date:** [October 16, 2020, 3:31pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/152 "2020-10-16T15:31:34Z")
433 have no frequency plan and 915 would be illegal. TTN uses the frequency plan setup in the ABP sketch just fine. [https://www.thethingsnetwork.org/docs/lorawan/frequency-plans.html](https://www.thethingsnetwork.org/docs/lorawan/frequency-plans.html) ---
**Author:** ![cslorabox](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/cslorabox/32/35697_2.png) [@cslorabox](https://www.thethingsnetwork.org/forum/u/cslorabox)\ **Post date:** [October 16, 2020, 3:51pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/153 "2020-10-16T15:51:17Z")
> [@lorauser](#): > > If you said “it means the LMIC has crashed.”, then I switch back to… Realistically speaking, please either: - Switch to a feather and use MCCI LMiC with _exactly_ the same setup as MCCI does, current git checkout, extra jumper wire on DIO as documented, etc or - Use exactly the same versions on the ATmega328p that Nick is using and then actually _debug_ why your setup is not working. Randomly jumping around and _guessing_ what messages mean isn’t going to get you anywhere. Pick a path and get down to the facts. ---
**Author:** ![lorauser](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/lorauser/32/25844_2.png) [@lorauser](https://www.thethingsnetwork.org/forum/u/lorauser)\ **Post date:** [October 16, 2020, 6:12pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/154 "2020-10-16T18:12:39Z")
Useful information for young debuggers: If you don’t see EV\_TXCOMPLETE -\> **Check DIO1 pin. In my case, RFM95 pin DIO1 lost connection with arduino pin 3**. When I walked outside hoping I will be heard by one public gateway with the node in my backpack, the wires were moving and DIO1 wire was broked inside the insulation. After a careful inspection I discovered this. Changing DIO1 wire resolved the problem with absence of EV\_TXCOMPLETE message in the console. Now I can continue debugging with the last version you recommended 1.5.0+arduino3 ---
**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\ **Post date:** [October 16, 2020, 8:42pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/155 "2020-10-16T20:42:23Z")
Thank you for posting this - I know you checked the connections previously, I haven’t been caught out like this in a few years, but after 40 years, I know that I will miss something like this again! Fingers crossed you get an uplink - you can use your phone to check in real time. ---
**Author:** ![lorauser](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/lorauser/32/25844_2.png) [@lorauser](https://www.thethingsnetwork.org/forum/u/lorauser)\ **Post date:** [October 18, 2020, 7:58pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/156 "2020-10-18T19:58:04Z")
> [@descartes](#): > > Fingers crossed you get an uplink - you can use your phone to check in real time. ![giphy (1)](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/b/7/b750f2737167b86c4949ea4479696a3f2edc65e7.gif) While walking out taday I oserved for the first time frames up. ![frames-ok](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/2/7/27c2ea9f64a061aee9ba3d08295beb75f2a8f43f.jpeg) And from my phone I expanded data field: ![packet details](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/3/1/311949d8bd0fb486dd462ebf249e4463155d8e14.jpeg) But now, the data field is empty, I can’t analyze nothing. Why data is deleted so fast from TTN? Is good I took a screenshot with my phone. I tried to decode the payload with [an online decoder](https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/) too see if is hello world message, but no successful. Or data is not correct, or I did something wrong. But this is another problem. Now I know, from my house it will never work, I’m not in area. Thanks all for help. ---
**Author:** ![arjanvanb](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/arjanvanb/32/46626_2.png) [@arjanvanb](https://www.thethingsnetwork.org/forum/u/arjanvanb)\ **Post date:** [October 18, 2020, 8:26pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/157 "2020-10-18T20:26:06Z")
> [@lorauser](#): > > I tried to decode the payload with [an online decoder](https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/) too see if is hello world message, but no successful. That decoder needs the full LoRaWAN message, as seen on the gateway. That includes about 13 additional bytes for things like some header, the DevAddr and a MIC. Your application’s Data page in TTN Console sees the _application_ payload. For that, TTN does not know how it’s encoded by your device. But [surely](https://www.binaryhexconverter.com/hex-to-ascii-text-converter) 0x48656C6C6F2C20776F726C6421 is `Hello, world!`. (Next step: [don’t send text](https://www.thethingsnetwork.org/forum/t/best-practices-to-limit-application-payloads/1302).) ---
**Author:** ![lorauser](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/lorauser/32/25844_2.png) [@lorauser](https://www.thethingsnetwork.org/forum/u/lorauser)\ **Post date:** [October 18, 2020, 8:29pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/158 "2020-10-18T20:29:57Z")
> [@arjanvanb](#): > > Your application’s Data page sees the _application_ payload. For that, TTN does not know how it’s encoded by your device. But [surely](https://www.binaryhexconverter.com/hex-to-ascii-text-converter) 0x48656C6C6F2C20776F726C6421 is `Hello, world!` . It’s true! I thought I need a decoder, but is a simple hex ---
**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\ **Post date:** [October 18, 2020, 10:08pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/159 "2020-10-18T22:08:07Z")
> [@lorauser](#): > > While walking out taday I oserved for the first time frames up. Hurray! Champagne all round! 🍸 🥂 ---
**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\ **Post date:** [October 18, 2020, 10:12pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/160 "2020-10-18T22:12:40Z")
> [@lorauser](#): > > Why data is deleted so fast from TTN? Only on the console page, that’s normal, it’s only a debug facility. Turn on the Data Storage integration - that will keep all data for up to 7 days: [https://www.thethingsnetwork.org/docs/applications/storage/](https://www.thethingsnetwork.org/docs/applications/storage/) And, as there are still some gaps to fill in your knowledge, a quick review of the following would help: [https://www.thethingsnetwork.org/docs/lorawan/](https://www.thethingsnetwork.org/docs/lorawan/) The devices section of: [https://www.thethingsnetwork.org/docs/devices/](https://www.thethingsnetwork.org/docs/devices/) The gateways section of: [https://www.thethingsnetwork.org/docs/gateways/](https://www.thethingsnetwork.org/docs/gateways/) The network section of: [https://www.thethingsnetwork.org/docs/network/](https://www.thethingsnetwork.org/docs/network/) The applications and API sections of: [https://www.thethingsnetwork.org/docs/applications/](https://www.thethingsnetwork.org/docs/applications/) ---
**Author:** ![lorauser](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/lorauser/32/25844_2.png) [@lorauser](https://www.thethingsnetwork.org/forum/u/lorauser)\ **Post date:** [October 18, 2020, 10:16pm UTC](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058/161 "2020-10-18T22:16:38Z")
Thank you 👍 [Previous page](https://www.thethingsnetwork.org/forum/t/arduino-nano-and-rfm95-basic-test-ev-join-txcomplete-no-joinaccept/40058.md?page=7)