Hi,
DFU in step 2 is based on our RUI firmware. It can’t be mixed with Arduino because of two system. In fact, Arduino support DFU with Adafruit code and hex. If you want to do it, you can refer to the this. But remember, the board must have firmware support DFU. If empty, nothing can be done.
#include <Arduino.h>
#include <bluefruit.h>
// Forward declarations for functions
void connect_callback(uint16_t conn_handle);
void disconnect_callback(uint16_t conn_handle, uint8_t reason);
/**
@brief BLE DFU service
@note Used for DFU OTA upgrade
*/
BLEDfu bledfu;
/**
@brief Arduino setup function. Called once after power on or reset
*/
void setup()
{
// Initialize built in green LED
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH);
// Initialize Serial for debug output
Serial.begin(115200);
// Wait for USB Serial to be ready or terminal to be connected
time_t timeout = millis(); // Timeout in case the system runs on its own
// Waiting for Serial
while (!Serial)
{
if ((millis() - timeout) < 5000)
{
// Blink the LED to show that we are alive
delay(100);
digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
}
else
{
// Timeout while waiting for USB Serial
break;
}
}
// Config the peripheral connection with maximum bandwidth
// more SRAM required by SoftDevice
// Note: All config***() function must be called before begin()
Bluefruit.configPrphBandwidth(BANDWIDTH_MAX);
Bluefruit.configPrphConn(92, BLE_GAP_EVENT_LENGTH_MIN, 16, 16);
Bluefruit.begin(1, 0);
// Set max power. Accepted values are: -40, -30, -20, -16, -12, -8, -4, 0, 4
Bluefruit.setTxPower(4);
// Set the BLE device name
Bluefruit.setName(“RAK4631_OTA”);
Bluefruit.Periph.setConnectCallback(connect_callback);
Bluefruit.Periph.setDisconnectCallback(disconnect_callback);
// To be consistent OTA DFU should be added first if it exists
bledfu.begin();
// Set up and start advertising
// Advertising packet
Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
Bluefruit.Advertising.addTxPower();
Bluefruit.Advertising.addName();
/* Start Advertising
- Enable auto advertising if disconnected
- Interval: fast mode = 20 ms, slow mode = 152.5 ms
- Timeout for fast mode is 30 seconds
- Start(timeout) with timeout = 0 will advertise forever (until connected)
For recommended advertising interval
https://developer.apple.com/library/content/qa/qa1931/_index.html
*/
Bluefruit.Advertising.restartOnDisconnect(true);
Bluefruit.Advertising.setInterval(32, 244); // in unit of 0.625 ms
Bluefruit.Advertising.setFastTimeout(30); // number of seconds in fast mode
Bluefruit.Advertising.start(0); // 0 = Don’t stop advertising after n seconds
}
/**
@brief Callback when client connects
@param conn_handle: Connection handle id
*/
void connect_callback(uint16_t conn_handle)
{
(void)conn_handle;
Serial.println(“BLE client connected”);
}
/**
@brief Callback invoked when a connection is dropped
@param conn_handle: connection handle id
@param reason: disconnect reason
*/
void disconnect_callback(uint16_t conn_handle, uint8_t reason)
{
(void)conn_handle;
(void)reason;
Serial.println(“BLE client disconnected”);
}
/**
@brief Arduino loop. Runs forever until power off or reset
*/
void loop()
{
}