# Only 15% of messages arives

**URL:** <https://www.thethingsnetwork.org/forum/t/only-15-of-messages-arives/16257>\
**Category:** Uncategorized\
**Created:** [July 25, 2018, 1:22pm UTC](https://www.thethingsnetwork.org/forum/t/only-15-of-messages-arives/16257 "2018-07-25T13:22:22Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![kobe](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/k/45deac/32.png) [@kobe](https://www.thethingsnetwork.org/forum/u/kobe)\
**Post date:** [July 25, 2018, 1:22pm UTC](https://www.thethingsnetwork.org/forum/t/only-15-of-messages-arives/16257/1 "2018-07-25T13:22:22Z")

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Hey,

I loaded the SendOTAA example in the ‘the things uno’ and made it send a byte every 10 seconds. The problem is that my gateway only receives 15% of the messages i send.

Can someone help me with this?

Thanks already,  
Kobe

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**Author:** ![DeuxVis](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/deuxvis/32/40111_2.png) [@DeuxVis](https://www.thethingsnetwork.org/forum/u/DeuxVis)\
**Post date:** [July 25, 2018, 1:41pm UTC](https://www.thethingsnetwork.org/forum/t/only-15-of-messages-arives/16257/2 "2018-07-25T13:41:24Z")

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Describe your setup a little more. What gateway are you using ?

15% suspiciously looks like 1/8 : maybe you are using a single channel gateway and your node is sending on all 8 channels ?

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**Author:** ![kobe](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/k/45deac/32.png) [@kobe](https://www.thethingsnetwork.org/forum/u/kobe)\
**Post date:** [July 25, 2018, 1:47pm UTC](https://www.thethingsnetwork.org/forum/t/only-15-of-messages-arives/16257/3 "2018-07-25T13:47:55Z")

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Thanks for the quick answer.

My gateway is a raspberry Pi with the dragino LoRa/GPS hat, using the software from the github page of bokse001. This way the one way gateway can work in two directions.  
(to be precise, it is 15,77% (counted over 600 messages))

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**Author:** ![htdvisser](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/htdvisser/32/45312_2.png) [@htdvisser](https://www.thethingsnetwork.org/forum/u/htdvisser)\
**Post date:** [July 25, 2018, 2:05pm UTC](https://www.thethingsnetwork.org/forum/t/only-15-of-messages-arives/16257/4 "2018-07-25T14:05:11Z")

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The Dragino LoRa/GPS Hat is single-channel, so @DeuxVis’s suspicion is likely correct.

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**Author:** ![kobe](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/k/45deac/32.png) [@kobe](https://www.thethingsnetwork.org/forum/u/kobe)\
**Post date:** [July 25, 2018, 2:12pm UTC](https://www.thethingsnetwork.org/forum/t/only-15-of-messages-arives/16257/5 "2018-07-25T14:12:46Z")

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ok, thanks.

Do you have any advice on what gateway i should use instead? I’d rather not use the original one because I want to be able to modify hard- and software. I’d prefer a raspberry pi shield…

edit: Or could I change a setting in the uno so it only transmits on one channel?

Thanks for the help

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**Author:** ![Sandgroper](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/sandgroper/32/46619_2.png) [@Sandgroper](https://www.thethingsnetwork.org/forum/u/Sandgroper)\
**Post date:** [July 25, 2018, 4:16pm UTC](https://www.thethingsnetwork.org/forum/t/only-15-of-messages-arives/16257/6 "2018-07-25T16:16:48Z")

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You could look at a RAK831 gateway module with an adapter board to go between the Pi Zero and the RAK831 module. One such adapter by Charles Hallard, one of the TTN contributors, is here: [https://github.com/hallard/RAK831-Zero](https://github.com/hallard/RAK831-Zero)

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**Author:** ![Linar](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/linar/32/35697_2.png) [@Linar](https://www.thethingsnetwork.org/forum/u/Linar)\
**Post date:** [July 25, 2018, 7:01pm UTC](https://www.thethingsnetwork.org/forum/t/only-15-of-messages-arives/16257/7 "2018-07-25T19:01:59Z")

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> [@kobe](#):
>
> edit: Or could I change a setting in the uno so it only transmits on one channel?

It depends on what software do you run on the uno. If LMIC - [this post](https://www.thethingsnetwork.org/forum/t/can-lmic-1-6-be-set-up-to-use-a-single-channel-and-sf/5207/11) should help you.

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**Author:** ![kobe](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/k/45deac/32.png) [@kobe](https://www.thethingsnetwork.org/forum/u/kobe)\
**Post date:** [July 26, 2018, 6:17am UTC](https://www.thethingsnetwork.org/forum/t/only-15-of-messages-arives/16257/8 "2018-07-26T06:17:58Z")

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I am using the sdk as provided by TTN.