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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;

working-principle.jpg
        #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);
}
    
Qi Zhu

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