Added Bluetooth serial support for ESP32

Author: mholeys

Software/Arduino code/OpenAstroTracker/Configuration_adv.hpp

@@ -216,6 +216,7 @@
 #define ESPBOARD
 #undef HEADLESS_CLIENT
 #define HEADLESS_CLIENT 1
+// #define HEADLESS_BLUETOOTH 1
 #define WIFI_ENABLED 
 #if defined(ESP8266) 
   #undef RUN_STEPPERS_IN_MAIN_LOOP

Software/Arduino code/OpenAstroTracker/src/b_setup.hpp

@@ -14,6 +14,10 @@ LcdButtons lcdButtons(0);
 
 #ifdef ESP32
 DRAM_ATTR Mount mount(RAStepsPerDegree, DECStepsPerDegree, &lcdMenu);
+#ifdef HEADLESS_BLUETOOTH 
+  #include "BluetoothSerial.h"
+  BluetoothSerial SerialBT;
+#endif
 #else
 Mount mount(RA_STEPS_PER_DEGREE, DEC_STEPS_PER_DEGREE, &lcdMenu);
 #endif
@@ -134,6 +138,9 @@ void setup() {
   // end microstepping -------------------
 
   Serial.begin(57600);
+  #ifdef HEADLESS_BLUETOOTH
+  SerialBT.begin("OpenAstroTracker");
+  #endif
   //BT.begin(9600);
 
   LOGV2(DEBUG_ANY, F("Hello, universe, this is OAT %s!"), VERSION);

Software/Arduino code/OpenAstroTracker/src/f_serial.hpp

@@ -6,6 +6,12 @@
 #include "MeadeCommandProcessor.hpp"
 
 void processSerialData();
+#ifdef HEADLESS_BLUETOOTH
+bool bt_connected = false;
+void processSerialBTData();
+void bt_callback(esp_spp_cb_event_t event, esp_spp_cb_param_t *param);
+bool setupCallback = false;
+#endif
 
 ////////////////////////////////////////////////
 // The main loop when under serial control
@@ -16,11 +22,22 @@ void serialLoop()
 
 #ifdef ESPBOARD
     processSerialData();
+
+#ifdef HEADLESS_BLUETOOTH
+    if (!setupCallback) {
+        SerialBT.register_callback(bt_callback);
+        setupCallback = true;
+    }
+    if (bt_connected) {
+        processSerialBTData();
+    }
+#endif
 #endif
 
 #ifdef WIFI_ENABLED
     wifiControl.loop();
 #endif
+
 }
 
 //////////////////////////////////////////////////
@@ -55,4 +72,56 @@ void processSerialData() {
     }
 }
 
+#ifdef HEADLESS_BLUETOOTH 
+void processSerialBTData() {
+    char buffer[2];
+    while (SerialBT.available() > 0) {
+        if (SerialBT.readBytes(buffer, 1) == 1) {
+            if (buffer[0] == 0x06) {
+                LOGV1(DEBUG_SERIAL, F("SerialBT: Received: ACK request, replying"));
+                SerialBT.print('1');
+            } else {
+                String inCmd = String(buffer[0]) + SerialBT.readStringUntil('#');
+                LOGV2(DEBUG_SERIAL, F("SerialBT: Received: %s"), inCmd.c_str());
+                if (inCmd == "Ka") {
+                    SerialBT.print('1');
+                    continue;
+                }
+                if (inCmd == "K*") {
+                    SerialBT.print('1');
+                    continue;
+                }
+                if (inCmd.charAt(1) == 0x06) {
+                    SerialBT.print('P');
+                    continue;
+                }
+                
+
+                String retVal = MeadeCommandProcessor::instance()->processCommand(inCmd);
+                if (retVal != "") {
+                    LOGV2(DEBUG_SERIAL, F("SerialBT: Replied:  %s"), retVal);
+                    SerialBT.print(retVal);
+                } else {
+                    LOGV2(DEBUG_SERIAL, F("Didnt reply %s"), retVal);
+                }
+            }
+        } else {
+            LOGV1(DEBUG_SERIAL, F("SerialBT: Read nothing"));
+        }
+           
+        mount.loop();
+    }
+}
+void bt_callback(esp_spp_cb_event_t event, esp_spp_cb_param_t *param) {
+    switch (event) {
+        case ESP_SPP_SRV_OPEN_EVT:
+            bt_connected = true;
+        break;
+        case ESP_SPP_CLOSE_EVT:
+            bt_connected = false;
+            break;
+    }
+}
+#endif
+
 #endif