petrocorii

I couldn't get the above to compile, but the ESP32 Arduino library BluetoothSerial.h seems to work well enough. Windows Synscan responds well and I can now control the mount via bluetooth in Synscan and via the ascom driver in Sharpcap. The code below is almost the same as the SerialToSerialBT example which comes with the ESP32 Arduino install, the main change is the use of Serial2 - this separates the chip programming pins from the pins being used to talk to the mount. The TXD/RXD pins for the mount are 25 + 27 / GPIO16 + GPIO17 / U2_RXD + U2_TXD The board I used is a ESP-WROOM-32 and I used the ESP32-WROOM-DA Board Module selection in the Arduino menu. It is important to select a board that has Bluetooth Classic, since the BluetoothSerial library will not work with Bluetooth LE. Also - make sure your usb programming cable is a data cable and not just a charging cable! If you want to use the 12v output from the RJ11 port to power the module, you will still have to step down the voltage with something like a LM7805 regulator. The ESP32 has a 3.3v regulator onboard, but attaching 12v will fry it. Step down to 5v then connect this to the VIN port of the ESP32. The data pins on the ESP32 are 3v, the same as the Virtuoso mount, so they can be directly attached, no need to level shift. The GND from the RJ11 also needs to be connected to the ESP32. If everything has worked, then you should be able to pair with a bluetooth device called ESP-Telescope. On my version of Windows, this creates a "Standard Serial over Bluetooth link" on COM5 and COM6. In Synscan select Settings/Connect Settings/Serial/ then select COM6 in the Serial Port Name menu. #include "BluetoothSerial.h" BluetoothSerial SerialBT; void setup() { SerialBT.begin("ESP-Telescope"); Serial2.begin(9600, SERIAL_8N1); } void loop() { if(Serial2.available()) { SerialBT.write(Serial2.read()); } if (SerialBT.available()) { Serial2.write(SerialBT.read()); } delayMicroseconds(50); }

I'm going to give this ESP32 based UART/bluetooth bridge a try, will update if it works https://github.com/coddingtonbear/esp32-bluetooth-bridge Incidentally, I tried out plate solving in Sharpcap last night and was able to find M2 - the first DSO I have ever seen! Taken with a Svbony 305, with the 114p Virtuoso on a bedside table, pointing out of a window in central-ish London. 80 frame/107s live stack in Sharpcap + photoshop.

tldr: It seems the HC-05 is using the wrong serial parameters to connect to the mount, but these settings don't have documented AT commands. I've also been looking at using the HC-05. Connections to my Virtuoso mount work fine over a 3.3v serial cable. My Windows version of Synscan works fine using a cable. Another way to test is to connect to the mount using a terminal program and type: :e1 Typing these three characters plus a CR should produce the response "=0210A" from the mount. This doesn't work for the HC-05, nor does Synscan. I compared the output of the two connections using the trial version of "Advanced Serial Port Monitor". The working serial cable connects using these parameters: Baud rate 9600 Data bits=8, Stop bits=1, Parity=None Set chars: Eof=0x00, Error=0x00, Break=0x00, Event=0x00, Xon=0x11, Xoff=0x13 Handflow: ControlHandShake=(), FlowReplace=(XOFF_CONTINUE), XonLimit=2048, XoffLimit=512 The HC-05 module tries to connect to the mount using these parameters: Baud rate 9600 Data bits=8, Stop bits=1, Parity=None Set chars: Eof=0x00, Error=0x00, Break=0x00, Event=0x00, Xon=0x00, Xoff=0x00 Handflow: ControlHandShake=(DTR_CONTROL, CTS_HANDSHAKE), FlowReplace=(TRANSMIT_TOGGLE, RTS_HANDSHAKE), XonLimit=0, XoffLimit=0 Xon, Xoff, Controlhandshake, FlowReplace, XonLimit, XoffLimit have differing values. The problem is, I can't find any documented AT commands to change these parameters on the HC-05 module. The only documented AT command related to UART parameters is "AT+UART", but this can only change baud, stop bit and parity settings. If no other parameters can be changed, then this probably won't work?