Programmer Think

1, What is Bluetooth? Bluetooth is a short-range wireless communication technology, which can realize the data exchange between fixed devices and mobile devices. Generally, BR/EDR Bluetooth before Bluetooth 3.0 is called traditional Bluetooth, while LE Bluetooth under Bluetooth 4.0 specification is called low-power Bluetooth. Many people's un ...

BLE introduction BLE Bluetooth is a Bluetooth module above Bluetooth 2.0, and classic Bluetooth is Bluetooth below Bluetooth 2.0. Bluetooth is divided into client and server. Classic Bluetooth can communicate between client and server through socket programming (similar to network socket), but BLE Bluetooth cannot communicate in this way. Ther ...

1, Background 1.1 Low Power Bluetooth (BLE) protocol stack The link layer (LL) controls the RF state of the equipment, which has five equipment states: standby, broadcast, scanning, initialization and connection. The broadcast is a broadcast packet, while the scan is to monitor the broadcast. In GAP communication, the central device (Centr ...

The BLE chip of Dialog basically has OTP (one time programmable) memory, that is, the memory written at one time. Once written, it cannot be modified. For example, DA14531 has 32KB OTP memory. It is mainly used to write curing programs and save some important factory parameters. The following mainly describes how to read and write OTP memory an ...