Thanks. Karel _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.... This email sent to site_archiver@lists.apple.com I have been working from example code for a Bluetooth LE application on the iPhone4S and have reused the readValueForCharacteristic and writeValue:forCharacteristic for accessing attributes which will fit into one packet (i.e. length less than 20bytes or so). Are there any read/write functions available for accessing a subrange of large attributes, that is, how does one do Read/Write Blob with iOS (on the iPhone4S)?