kopia lustrzana https://github.com/dvarrel/XCTRACK_vario
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/*
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VARIO XCTRACK
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arduino nano
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sensor ms5611
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damien varrel 07/2020
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Based on Arduino Vario by Benjamin PERRIN 2017 / Vari'Up
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Based on Arduino Vario by Jaros, 2012 and vario DFelix 2013
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https://github.com/LK8000/LK8000/blob/master/Docs/LK8EX1.txt
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$LK8EX1,pressure,altitude,vario,temperature,battery,*checksum
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test sentence PRS, shorter but no checksum
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*/
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//MS5XXX library by Roman Schmitz
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#include <MS5611.h>
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#include <avr/wdt.h>
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#include <SoftwareSerial.h>
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/////////////////////////////////////////
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MS5611 sensor(&Wire);
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#define RX 11 // not used (TX module bluetooth)
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#define TX 12 // MISO on ISCP (RX module bluetooth)
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SoftwareSerial BTserial(RX, TX); // RX not connected
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#define USB_SPEED 115200 //serial transmision speed
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#define BLUETOOTH_SPEED 9600 //bluetooth speed (9600 by default)
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#define FREQUENCY 10 // freq output in Hz
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#define USB_MODE // usb by default
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// #define BLUETOOTH_MODE // uncomment this line for bluetooth mode
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#define USE_LK8000 //comment this line to use PRS sentence
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// normally you do not need USB_MODE if you use BLUETOOTH_MODE
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/*
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these 2 sentences are available for xctrack :
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LK8000 sentence : 32 chars to send
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$LK8EX1,pressure,altitude,vario,temperature,battery,*checksum
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PRS sentence : 10 chars to send
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PRS pressure in pascal in hexadecimal format
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bluetooth in 9600 bauds -> 1.25ms for a char
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LK8000 : 1.25*32=40ms
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PRS : 1.25*10=12.5ms
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USB in 115200 bauds -> 0.08ms for a char
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LK8000 : 0.08*32=2.5ms
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PRS : 0.08*10=0.8ms
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PRS is faster but LK8000 has checksum !
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*/
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const char compile_date[] = "XCTRACK VARIO " __DATE__;
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const char mess_check[] = "checking MS5611 sensor...";
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const char mess_error[] = "Error connecting MS5611...";
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const char mess_reset[] = "Reset in 1s...";
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void setup() {
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wdt_disable();
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#ifdef USB_MODE
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Serial.begin(USB_SPEED);
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Serial.println(compile_date);
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Serial.println(mess_check);
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Serial.println(mess_check);
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#endif
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#ifdef BLUETOOTH_MODE
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BTserial.begin(BLUETOOTH_SPEED); // start communication with the HC-05 using 38400
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BTserial.println(compile_date);
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BTserial.println(mess_check);
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#endif
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wdt_enable(WDTO_1S); //enable the watchdog 1s without reset
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if (sensor.connect()>0) {
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#ifdef USB_MODE
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Serial.println(mess_error);
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Serial.println(mess_reset);
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#endif
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#ifdef BLUETOOTH_MODE
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BTserial.println(mess_error);
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BTserial.println(mess_reset);
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#endif
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delay(1200); //for watchdog timeout
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}
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sensor.ReadProm(); //takes about 3ms
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}
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uint32_t get_time = millis();
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uint32_t sum = 0;
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uint8_t n = 0;
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void loop(void) {
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wdt_reset();
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sensor.Readout(); // with OSR4096 takes about 10ms
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uint32_t Pressure = sensor.GetPres();
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sum += Pressure;
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//Serial.print(Pressure);
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//Serial.print(",");
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n += 1;
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if (millis() >= (get_time + (1000/FREQUENCY))) //every 100 milli-seconds send NMEA output over serial port
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{
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get_time = millis();
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Pressure = sum / n ;
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sum=0; n=0;
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uint8_t Temp = sensor.GetTemp()/100;
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//$LK8EX1,pressure,altitude,vario,temperature,battery,*checksum
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//$LK8EX1,pressure,99999,9999,temp,999,*checksum
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#ifdef USE_LK8000
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String str_out = String("LK8EX1,")
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+String(Pressure)+String(",0,9999,")
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+String(Temp)+String(",999,");
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// Calculating checksum for data string
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uint16_t checksum = 0, bi;
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for (uint8_t ai = 0; ai < str_out.length(); ai++)
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{
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bi = (uint8_t)str_out[ai];
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checksum ^= bi;
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}
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str_out = "$"+str_out+"*"+String(checksum, HEX);
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#else // use PRS sentence
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String str_out = String("PRS ")+ String(Pressure, HEX);
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#endif
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#ifdef USB_MODE
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Serial.println(str_out);
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#endif
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#ifdef BLUETOOTH_MODE
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BTserial.println(str_out);
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#endif
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}
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}
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