# RN2483 now supporting Class C: what does that mean for TTN?

**URL:** <https://www.thethingsnetwork.org/forum/t/rn2483-now-supporting-class-c-what-does-that-mean-for-ttn/5039>\
**Category:** End Devices (Nodes)\
**Created:** [January 26, 2017, 12:24pm UTC](https://www.thethingsnetwork.org/forum/t/rn2483-now-supporting-class-c-what-does-that-mean-for-ttn/5039 "2017-01-26T12:24:34Z")\
**Posts on this page:** 5\
**Page:** 1

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**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:** [January 26, 2017, 12:24pm UTC](https://www.thethingsnetwork.org/forum/t/rn2483-now-supporting-class-c-what-does-that-mean-for-ttn/5039/1 "2017-01-26T12:24:34Z")

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Continuing the discussion from [Microchip released RN2483 library code](https://www.thethingsnetwork.org/forum/t/microchip-released-rn2483-library-code/4439/29):

> [@jmarcelino](#):
>
> Biggest news:  
> **LoRaWAN Class C support for end devices**  
> Whoah!

But how would one use that…?

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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:** [January 26, 2017, 3:35pm UTC](https://www.thethingsnetwork.org/forum/t/rn2483-now-supporting-class-c-what-does-that-mean-for-ttn/5039/2 "2017-01-26T15:35:47Z")

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Support for Class C devices is on our TODO list. I don’t have an ETA for you.

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**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:** [January 26, 2017, 3:48pm UTC](https://www.thethingsnetwork.org/forum/t/rn2483-now-supporting-class-c-what-does-that-mean-for-ttn/5039/3 "2017-01-26T15:48:22Z")

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The very nice things [about Class C](https://www.lora-alliance.org/portals/0/specs/LoRaWAN%20Specification%201R0.pdf#page=70) is that no uplinks are required to trigger a possible downlink, and that multicast is supported. So: less waste of air time and backend computing power. But still then, downlinks are always expensive for gateways, and without an uplink to trigger it, TTN would not even know which gateway is the best to use for the downlink?

So I’d guess that for Class C one cannot expect the number of downlinks to be (much) greater than the maximum of 10 per day as [currently defined by TTN](https://www.thethingsnetwork.org/forum/t/limitations-data-rate-packet-size-30-seconds-uplink-and-10-messages-downlink-per-day-fair-access-policy/1300)?

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**Author:** ![etudeselectroniques](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/etudeselectroniques/32/20484_2.png) [@etudeselectroniques](https://www.thethingsnetwork.org/forum/u/etudeselectroniques)\
**Post date:** [February 11, 2019, 1:14pm UTC](https://www.thethingsnetwork.org/forum/t/rn2483-now-supporting-class-c-what-does-that-mean-for-ttn/5039/4 "2019-02-11T13:14:04Z")

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Hello everybody,  
actually, i use RN2483A module for Class-A LoraWAN communication.

For a new application (Modbus LoraWAN converter), i need to use a class-C module (RX window always open for continous listening).  
Do you know if RN2483 (with new firmware, i suppose…) will be class-C compatible ?  
And if yes, when ?

Thank you, best regards,  
Thomas RETAIL.

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**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\
**Post date:** [February 11, 2019, 6:10pm UTC](https://www.thethingsnetwork.org/forum/t/rn2483-now-supporting-class-c-what-does-that-mean-for-ttn/5039/5 "2019-02-11T18:10:28Z")

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If you bother to check the microchip website you will find firmware version 1.0.5 which lists class C in the release notes.