225 lines
6.3 KiB
C++
225 lines
6.3 KiB
C++
/*
|
|
* This file is part of the "bluetoothheater" distribution
|
|
* (https://gitlab.com/mrjones.id.au/bluetoothheater)
|
|
*
|
|
* Copyright (C) 2018 Ray Jones <ray@mrjones.id.au>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include "pins.h"
|
|
#include "Protocol.h"
|
|
#include "debugport.h"
|
|
#include "BluetoothHC05.h"
|
|
#include "BTCConfig.h"
|
|
#include "helpers.h"
|
|
|
|
// Bluetooth access via HC-05 Module, using a UART
|
|
|
|
|
|
CBluetoothHC05::CBluetoothHC05(int keyPin, int sensePin)
|
|
{
|
|
// extra control pins required to fully drive a HC05 module
|
|
_keyPin = keyPin; // used to enable AT command mode (ONLY ON SUPPORTED MODULES!!!!)
|
|
_sensePin = sensePin; // feedback signal used to sense if a client is connected
|
|
|
|
pinMode(_keyPin, OUTPUT);
|
|
digitalWrite(_keyPin, LOW); // request HC-05 module to enter data mode
|
|
// attach to the SENSE line from the HC-05 module
|
|
// this line goes high when a BT client is connected :-)
|
|
pinMode(_sensePin, INPUT);
|
|
}
|
|
|
|
|
|
void
|
|
CBluetoothHC05::begin()
|
|
{
|
|
const int BTRates[] = {
|
|
9600, 38400, 115200, 19200, 57600, 2400, 4800, 1200
|
|
};
|
|
|
|
_rxLine.clear();
|
|
|
|
digitalWrite(_keyPin, HIGH); // request HC-05 module to enter command mode
|
|
|
|
openSerial(9600); // virtual function, may call derived class method here
|
|
|
|
DebugPort.println("\r\n\r\nAttempting to detect HC-05 Bluetooth module...");
|
|
|
|
int BTidx = 0;
|
|
int maxTries = sizeof(BTRates)/sizeof(int);
|
|
for(BTidx = 0; BTidx < maxTries; BTidx++) {
|
|
DebugPort.print(" @ ");
|
|
DebugPort.print(BTRates[BTidx]);
|
|
DebugPort.print(" baud... ");
|
|
openSerial(BTRates[BTidx]); // open serial port at a std.baud rate
|
|
delay(10);
|
|
HC05_SerialPort.print("\r\n"); // clear the throat!
|
|
delay(100);
|
|
HC05_SerialPort.setTimeout(100);
|
|
|
|
if(ATCommand("AT\r\n")) { // probe with a simple "AT"
|
|
DebugPort.println(" OK."); // got a response - woo hoo found the module!
|
|
break;
|
|
}
|
|
if(ATCommand("AT\r\n")) { // sometimes a second try is good...
|
|
DebugPort.println(" OK.");
|
|
break;
|
|
}
|
|
|
|
// failed, try another baud rate
|
|
DebugPort.println("");
|
|
HC05_SerialPort.flush();
|
|
HC05_SerialPort.end();
|
|
delay(100);
|
|
}
|
|
|
|
DebugPort.println("");
|
|
if(BTidx == maxTries) {
|
|
// we could not get anywhere with the AT commands, but maybe this is the other module
|
|
// plough on and assume 9600 baud, but at the mercy of whatever the module name is...
|
|
DebugPort.println("FAILED to detect a HC-05 Bluetooth module :-(");
|
|
// leave the EN pin high - if other style module keeps it powered!
|
|
// assume it is 9600, and just (try to) use it like that...
|
|
// we will sense the STATE line to prove a client is hanging off the link...
|
|
DebugPort.println("ASSUMING a HC-05 module @ 9600baud (Unknown name)");
|
|
openSerial(9600);
|
|
}
|
|
else {
|
|
// found a HC-05 module at one of its supported baud rates.
|
|
// now program it's name and force a 9600 baud data interface.
|
|
// this is the defacto standard as shipped!
|
|
|
|
DebugPort.println("HC-05 found");
|
|
|
|
DebugPort.print(" Setting Name to \"Diesel Heater\"... ");
|
|
if(!ATCommand("AT+NAME=\"Diesel Heater\"\r\n")) {
|
|
DebugPort.println("FAILED");
|
|
}
|
|
else {
|
|
DebugPort.println("OK");
|
|
}
|
|
|
|
DebugPort.print(" Setting baud rate to 9600N81...");
|
|
if(!ATCommand("AT+UART=9600,1,0\r\n")) {
|
|
DebugPort.println("FAILED");
|
|
}
|
|
else {
|
|
DebugPort.println("OK");
|
|
}
|
|
|
|
openSerial(9600);
|
|
|
|
// leave HC-05 command mode, return to data mode
|
|
digitalWrite(_keyPin, LOW);
|
|
}
|
|
|
|
delay(50);
|
|
|
|
DebugPort.println("");
|
|
}
|
|
|
|
|
|
void
|
|
CBluetoothHC05::check()
|
|
{
|
|
// check for data coming back over Bluetooth
|
|
if(HC05_SerialPort.available()) { // serial rx data is available
|
|
char rxVal = HC05_SerialPort.read();
|
|
collectRxData(rxVal);
|
|
}
|
|
}
|
|
|
|
bool
|
|
CBluetoothHC05::isConnected()
|
|
{
|
|
return digitalRead(_sensePin);
|
|
}
|
|
|
|
void
|
|
CBluetoothHC05::send(const char* Str)
|
|
{
|
|
DebugPort.print("BT send: "); DebugPort.println(Str);
|
|
HC05_SerialPort.print(Str);
|
|
}
|
|
|
|
void
|
|
CBluetoothHC05::sendFrame(const char* pHdr, const CProtocol& Frame, bool lineterm)
|
|
{
|
|
// report to debug port
|
|
CBluetoothAbstract::sendFrame(pHdr, Frame, false);
|
|
|
|
if(isConnected()) {
|
|
if(Frame.verifyCRC()) {
|
|
// send data frame to HC-05
|
|
HC05_SerialPort.print(pHdr);
|
|
HC05_SerialPort.write(Frame.Data, 24);
|
|
// toggle LED
|
|
#if BT_LED == 1
|
|
digitalWrite(LED_Pin, !digitalRead(LED_Pin)); // toggle LED
|
|
#endif
|
|
}
|
|
else {
|
|
DebugPort.print("Bluetooth data not sent, CRC error ");
|
|
}
|
|
}
|
|
else {
|
|
if(lineterm) { // only report no client if this will be at end of line (long line support)
|
|
DebugPort.print("No Bluetooth client");
|
|
}
|
|
// force LED off
|
|
#if BT_LED == 1
|
|
digitalWrite(LED_Pin, LOW);
|
|
#endif
|
|
}
|
|
if(lineterm)
|
|
DebugPort.println("");
|
|
}
|
|
|
|
void
|
|
CBluetoothHC05::openSerial(int baudrate)
|
|
{
|
|
// standard serial port for Due, Mega (ESP32 uses virtual, derived from this class)
|
|
HC05_SerialPort.begin(baudrate);
|
|
}
|
|
|
|
// protected function, to perform Hayes commands with HC-05
|
|
bool
|
|
CBluetoothHC05::ATCommand(const char* cmd)
|
|
{
|
|
HC05_SerialPort.print(cmd);
|
|
char RxBuffer[16];
|
|
memset(RxBuffer, 0, 16);
|
|
int read = HC05_SerialPort.readBytesUntil('\n', RxBuffer, 16); // \n is not included in returned string!
|
|
if((read == 3) && (0 == strcmp(RxBuffer, "OK\r")) ) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
CBluetoothHC05::foldbackDesiredTemp()
|
|
{
|
|
StaticJsonBuffer<32> jsonBuffer; // create a JSON buffer on the stack
|
|
JsonObject& root = jsonBuffer.createObject(); // create object to add JSON commands to
|
|
|
|
if(foldbackModerator.addJson("TempDesired", getSetTemp(), root)) {
|
|
char opStr[32];
|
|
root.printTo(opStr);
|
|
send(opStr);
|
|
}
|
|
}
|
|
|