How to incease MTU size form 23 to 50 in nrf52810 with S112 ?https://devzone.nordicsemi.com/f/nordic-q-a/120121/how-to-incease-mtu-size-form-23-to-50-in-nrf52810-with-s112Hi. code base is sdk 17.1.0 MCU : nrf52810 Softdevice : S112 (7.2.0) use SES 5.42a step1. modify NRF_SDH_BLE_GATT_MAX_MTU_SIZE form 23 to 50 in sdk_config.h step2. modify RAM_START=0x20001a40 to 0x20001ad0 step. Rebuild and ru with PCA10040en-USTelligent Community 13Tue, 25 Mar 2025 08:35:05 GMTRE: How to incease MTU size form 23 to 50 in nrf52810 with S112 ?https://devzone.nordicsemi.com/thread/528761?ContentTypeID=1Tue, 25 Mar 2025 08:35:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4d51ec2a-2688-4790-a78a-b6eb2acfa689Vidar Berg<p>Hi,</p> <p>It should be sufficient to increase the&nbsp;<span>NRF_SDH_BLE_GATT_MAX_MTU_SIZE value as you did as long as you are using the<a href="https://docs.nordicsemi.com/bundle/sdk_nrf5_v17.1.0/page/lib_ble_gatt.html"> GATT module</a> to handle the MTU negotation for you.&nbsp;</span>Do you have any debug logs from the device that shows the result of the MTU negotiation?&nbsp;The error message &quot;<span>&nbsp;(Write operation failed : Invalid length 0x010D)&quot; is also a bit strange. I don&#39;t see how the length could have become set to 0x10d = 269 bytes. Are you able to write 47 bytes (50 - 3 byte ATT header) if you use the nRF Connect app on Android or iOS?&nbsp;</span></p> <p><span>Best regards,</span></p> <p><span>Vidar</span></p><div style="clear:both;"></div>