# Problem with ic880a or node **URL:** \ **Category:** Hardware\ **Created:** [March 19, 2019, 10:03am UTC](https://www.thethingsnetwork.org/forum/t/problem-with-ic880a-or-node/24098 "2019-03-19T10:03:56Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Cybo12](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/cybo12/32/21289_2.png) [@Cybo12](https://www.thethingsnetwork.org/forum/u/Cybo12)\ **Post date:** [March 19, 2019, 10:03am UTC](https://www.thethingsnetwork.org/forum/t/problem-with-ic880a-or-node/24098/1 "2019-03-19T10:03:57Z")
Hi everyone, I’m an in troubles with my gateway(ic880a+Raspberry Pi), I have successfully connected my end node (rn2483+ Arduino Uno) One time successfully with OTAA and after I had : “Join not accepted: denied Check your coverage, keys and backend status.” After that, I decided to switch for ABP connection and it’s was successful. I have all the time “Successful transmission” when I want to send something. But in these two options, I never receive something on my gateway (in TTN console). I have to check my several keys and so one. But my gateway has 0 packets receive again. The traffic page is blank on my gateway and on my application page. There is only my gateway in this place (sweet home campaign). Can you help me, please? (Sorry for my bad english) RN2483 version: 1.03 Code: TheThingsNetwork -\> TheThingsMessage -\> Send **IC880A Logs:** Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: INFO: [up] PUSH\_ACK for server router.eu.thethings.network received in 50 ms Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: INFO: [down] for server router.eu.thethings.network PULL\_ACK received in 45 ms Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: INFO: [down] for server router.eu.thethings.network PULL\_ACK received in 45 ms Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: INFO: [down] for server router.eu.thethings.network PULL\_ACK received in 45 ms Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: ##### 2019-03-19 09:54:54 GMT ##### Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: ### [UPSTREAM] ### Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # RF packets received by concentrator: 0 Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # CRC\_OK: 0.00%, CRC\_FAIL: 0.00%, NO\_CRC: 0.00% Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # RF packets forwarded: 0 (0 bytes) Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # PUSH\_DATA datagrams sent: 1 (263 bytes) Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # PUSH\_DATA acknowledged: 100.00% Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: ### [DOWNSTREAM] ### Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # PULL\_DATA sent: 3 (100.00% acknowledged) Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # PULL\_RESP(onse) datagrams received: 0 (0 bytes) Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # RF packets sent to concentrator: 0 (0 bytes) Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # TX errors: 0 Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: ### [GPS] ### Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # Invalid gps time reference (age: 1552989294 sec) Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: # Manual GPS coordinates: latitude 49.92908, longitude 5.35661, altitude 502 m Mar 19 10:54:54 ttn-gateway ttn-gateway[333]: ##### END ##### **RN2483 logs** Sending: mac join abp Personalize accepted. Status: 00000001 – LOOP Sending: mac tx uncnf 1 08011D0000F041250000AC422D0000C242 Successful transmission – LOOP Sending: mac tx uncnf 1 08011D0000F041250000AC422D0000C242 Successful transmission ---
**Author:** ![BoRRoZ](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/borroz/32/44234_2.png) [@BoRRoZ](https://www.thethingsnetwork.org/forum/u/BoRRoZ)\ **Post date:** [March 19, 2019, 2:02pm UTC](https://www.thethingsnetwork.org/forum/t/problem-with-ic880a-or-node/24098/2 "2019-03-19T14:02:28Z")
- you see your gateway registered in your console ? - are you sure your home made node is working/build correctly ? because RN2483 uses 3V3 and UNO uses 5V on the UART (need levelshifter) , also the TTN library is not for the arduino UNO but for the Arduino Leonardo. So, maybe your gateway is working and connected to TTN (do you see other packets coming in… leave browser page open) ---
**Author:** ![Cybo12](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/cybo12/32/21289_2.png) [@Cybo12](https://www.thethingsnetwork.org/forum/u/Cybo12)\ **Post date:** [March 19, 2019, 2:13pm UTC](https://www.thethingsnetwork.org/forum/t/problem-with-ic880a-or-node/24098/3 "2019-03-19T14:13:13Z")
Yes, she is connected and uptime is good. my code is this: [https://pastebin.com/jXNCikZU](https://pastebin.com/jXNCikZU) for connections: TX -\>10 RX -\>11 RST -\>12 3V3 -\> 3V3 GND -\> GND I will search for levelshifter but it seams to be ok actually when i see serial logs. Have you a library special for arduino UNO ? I have test RN2XX3 library with TheThingsUno - basic but i had always “Communication with RN2xx3 unsuccessful…”. I never receive message on my gateway actually so I dont know if she’s working. ---
**Author:** ![BoRRoZ](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/borroz/32/44234_2.png) [@BoRRoZ](https://www.thethingsnetwork.org/forum/u/BoRRoZ)\ **Post date:** [March 19, 2019, 2:23pm UTC](https://www.thethingsnetwork.org/forum/t/problem-with-ic880a-or-node/24098/4 "2019-03-19T14:23:09Z")
> [@Cybo12](#): > > I never receive message on my gateway actually so I dont know if she’s working. There is no other traffic at all at your (belgium) location ? Leave your console gateway traffic window open for a longer time (if neccessary in a low traffic location an hour or so 😉) - set your lora serial speed in your code lower because you use softserial ! _If you don’t have other 100% working nodes its difficult to test and be sure your gateway is working 100%_ _(imagine you don’t connect an antenna… the gateway will show ‘connected’ to TTN but you won’t see any packets coming in - check that to, cable and antenna)_ ---
**Author:** ![Cybo12](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/cybo12/32/21289_2.png) [@Cybo12](https://www.thethingsnetwork.org/forum/u/Cybo12)\ **Post date:** [March 19, 2019, 2:30pm UTC](https://www.thethingsnetwork.org/forum/t/problem-with-ic880a-or-node/24098/5 "2019-03-19T14:30:58Z")
![image](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/e/5/e519fe8ff59021782ce701028f1f1f86e71b4873.jpeg) _When you’re only lonely!_ I understand, but it will be difficult for me to have a working node ^^". I’m going to test with levelshifter, take a long time on my console gateway traffic window and speed down my softserial :). ---
**Author:** ![BoRRoZ](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/borroz/32/44234_2.png) [@BoRRoZ](https://www.thethingsnetwork.org/forum/u/BoRRoZ)\ **Post date:** [March 19, 2019, 3:43pm UTC](https://www.thethingsnetwork.org/forum/t/problem-with-ic880a-or-node/24098/6 "2019-03-19T15:43:56Z")
or order a cheap [leonardo](https://www.ebay.com/itm/Original-Leonardo-R3-Pro-ATmega32U4-Micro-USB-Arduino-Compatible-Without-Cable/201370958490) board maybe ? > [@How to build your first TTN node: Arduino + RN2483](https://www.thethingsnetwork.org/forum/t/how-to-build-your-first-ttn-node-arduino-rn2483/1574/67): > > a cloned TTN uno innocent [image] [image] works with [https://github.com/TheThingsNetwork/workshops](https://github.com/TheThingsNetwork/workshops) I used [this](http://www.ebay.com/itm/162243008749?_trksid=p2060353.m2749.l2649&var=461221917976&ssPageName=STRK%3AMEBIDX%3AIT) leonardo board and [this](http://www.ebay.com/itm/2-Channel-Logic-Level-Converter-TTL-Bi-directional-Shifter-Module-For-Arduino-/291525460145?hash=item43e04580b1:g:KFAAAOSwu4BVtyx-) level converter ---
**Author:** ![system](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/6/2/6250ea44fd2b0d6259489e1a92748df681e1f970.png) [@system](https://www.thethingsnetwork.org/forum/u/system)\ **Post date:** [May 18, 2019, 3:49pm UTC](https://www.thethingsnetwork.org/forum/t/problem-with-ic880a-or-node/24098/7 "2019-05-18T15:49:22Z")
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