Use BLE to configure Dual-band WiFi Microcontroller

[Yahui Ji]

Here we introduce another way to download firmware to your microcontroller board.

With a BLE5.0 & Dual-band WiFi microcontroller, you will never have to worry about re-compiling the code just to change the WiFi SSID and password. Write an introduction for your project

How does it work?
The working principle of BLE5.0 is working as follows:

1. the Ameba RTL8722DM board will send BLE information to your phone;
   
2. the phone will send the corresponding WiFi configuration including SSID and password to the RTL8722DM board;
   
3. the board is able to connect to the WiFi with the same SSID as your phone;
   

4. #include "BLEDevice.h" 
   #include "BLEWifiConfigService.h"  
   BLEWifiConfigService configService;  
   void setup() {     
       Serial.begin(115200);      
       BLE.init();     
       BLE.configServer(1);     
       configService.addService();     
       configService.begin();      // Wifi config service requires a specific     advertisement format to be recognised by the app 
   // The advertisement needs the local BT address, which can only be obtained after starting peripheral mode 
   // Thus, we stop advertising to update the advert data, wait for advertising to stop, then restart advertising with new data     
       BLE.beginPeripheral();     
       BLE.configAdvert()->stopAdv();     
       BLE.configAdvert()->setAdvData(configService.advData());     
       BLE.configAdvert()->updateAdvertParams();     
       delay(100);     
       BLE.configAdvert()->startAdv();  
   }  
   
   void loop() {     
       delay(1000); 
   }