https://devzone.nordicsemi.com/f/nordic-q-a/43582/characteristics-per-serviceHi, I am trying to understand the max number of characterstics per service; In the forms some say it&#39;s limited based on the memory allocated for the GATT table internally and some say it&#39;s not dependent on the memory. It&#39;s not clear for me. Righten-USTelligent Community 13Wed, 13 Feb 2019 15:49:09 GMThttps://devzone.nordicsemi.com/thread/170954?ContentTypeID=1Wed, 13 Feb 2019 15:49:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8955f201-d8f6-4d91-a98f-92cf18c0625braj_ron<p>Thank you, It&#39;s helpful.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/170598?ContentTypeID=1Tue, 12 Feb 2019 11:49:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f6517764-3058-42ad-b29d-6711258ed97eSigurd<p>Hi,</p> [quote userid="55477" url="~/f/nordic-q-a/43582/characteristics-per-service"]What&#39;s the maximum number of characterstics per service and what&#39;s it dependent on?[/quote] <p>It&#39;s only limited by the available memory. If you are adding a lot of characteristics you might need to increase&nbsp;NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE in sdk_config.h, and consequently the amount of RAM allocated to the SoftDevice.</p> [quote userid="55477" url="~/f/nordic-q-a/43582/characteristics-per-service"]It doesn&#39;t show in the advertisnment data.[/quote] <p>You are adding information about all the&nbsp;<span>characteristics&nbsp;in the advertising packet? Note that an advertising packet can only contain up to 31 bytes of data.</span></p><div style="clear:both;"></div>