include: ble_conn_params: incorrect stated maximum ATT MTU value

anhmolt · eivindj-nordic · commit a561f96b1bb5 · 2025-08-15T11:36:27.000+02:00
SoftDevice supports ATT MTU higher than 247.
Theoretically as high as 65535, but limited by configuration
(CONFIG_NRF_SDH_BLE_GATT_MAX_MTU_SIZE).

Signed-off-by: Andreas Moltumyr &lt;andreas.moltumyr@nordicsemi.no&gt;
diff --git a/include/ble_conn_params.h b/include/ble_conn_params.h
@@ -118,7 +118,8 @@ int ble_conn_params_override(uint16_t conn_handle, const ble_gap_conn_params_t *
  * @brief Initiate an ATT MTU exchange procedure for a given connection.
  *
  * The minimum supported ATT MTU value is 23 (connection's default).
- * The maximum supported ATT MTU value is 247.
+ * The maximum supported ATT MTU value is the minimum of @c CONFIG_NRF_SDH_BLE_GATT_MAX_MTU_SIZE
+ * and 65535.
  *
  * The SoftDevice needs to be configured to support non-default ATT MTU values
  * by setting @c CONFIG_NRF_SDH_BLE_GATT_MAX_MTU_SIZE to the maximum ATT MTU value

Original file line number	Diff line number	Diff line change
`@@ -118,7 +118,8 @@ int ble_conn_params_override(uint16_t conn_handle, const ble_gap_conn_params_t *`
`118`	`118`	`* @brief Initiate an ATT MTU exchange procedure for a given connection.`
`119`	`119`	`*`
`120`	`120`	`* The minimum supported ATT MTU value is 23 (connection's default).`
`121`		`- * The maximum supported ATT MTU value is 247.`
	`121`	`+ * The maximum supported ATT MTU value is the minimum of @c CONFIG_NRF_SDH_BLE_GATT_MAX_MTU_SIZE`
	`122`	`+ * and 65535.`
`122`	`123`	`*`
`123`	`124`	`* The SoftDevice needs to be configured to support non-default ATT MTU values`
`124`	`125`	`* by setting @c CONFIG_NRF_SDH_BLE_GATT_MAX_MTU_SIZE to the maximum ATT MTU value`