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BLEMidiServer.end() is it re-entrant? #42
Description
I have a use case where I need to start a BLEMidiServer, and some time later, end it, then start it again. I am trying to make use of the BLEMidiServer.end() to end the server and then reinitialize (included in the latest version of the library). I use Apple's AudioMidi Setup to connect to the server.
After I end(), then start again, NIMBle throws an error:
E NimBLEAdvertising: Error enabling advertising; rc=30,
and subsequent connect attempt using AudioMidi Setup, states:
W NimBLEAdvertising: Advertising already active
and connection cannot be made.
It seems like when end() is called, the service is still being advertised and therefore a restart runs into errors.
Is there a way to make this be fully re-entrant?
Here's a simple sketch to recreate this. Note you will have to use NIMBLE-Arduino library version 1.4.3 or lower.
#include <SPI.h>
#include <BLEMidi.h>
#define SerialMon Serial
const char* deviceName = "esp32-testBLEMidi";
bool serverStarted=0;
bool serverConnected=0;
void setupBLEMidiServer(){
BLEMidiServer.enableDebugging();
BLEMidiServer.setOnDisconnectCallback([]() {
Serial.println(F("BLEMidi server Disconnected..."));
serverConnected=0;
});
BLEMidiServer.setOnConnectCallback([]() {
Serial.println(F("BLEMidi server Connected"));
serverConnected=1;
});
BLEMidiServer.begin(deviceName);
Serial.println(F("BLEMidi server initialized"));
serverStarted=1;
}
void setup() {
Serial.begin(115200);
while (!Serial);
Serial.println(F("Serial port initialized"));
SPI.begin();
setupBLEMidiServer();
}
void loop() {
if( serverStarted ){
// wait 20 seconds then stop the midi server;
delay(20000);
BLEMidiServer.end();
Serial.println( "BLEMidiServer ended" );
serverStarted=0;
// wait 20 seconds, then start it again
delay(10000);
setupBLEMidiServer();
serverStarted = 1;
Serial.printf("serverConnected = %d\n", serverConnected);
}
}
Activity