tags and pasting into the arduino IDE.
And if anyone hasn't found it, ctrl "t" in the IDE autoformats the code.
If you click the little magnifying glass top right of the arduino IDE you should see the lovely NMEA messages in a serial monitor
[COLOR=#000000]#include <SFE_BMP180.h>[/COLOR]#include <Wire.h>
#define NMEA_TALKER_ID "WI" // Weather Instruments
#define NMEA_DELAY 10 // Send data every 10 seconds
// meters above mean sea level
#define ALTITUDE 1
// How many samples to take per iteration
#define PRESS_OVERSAMPLING 3
SFE_BMP180 pressure;
int init_pressure() {
if (pressure.begin()) return true;
}
void setup() {
Serial.begin(4800);
if (init_pressure() != true) {
nmea_txt("BMP180 init fail");
exit(1);
}
nmea_txt("Nanobaro ready.");
}
int get_temperature(double &temp) {
int status;
status = pressure.startTemperature();
if (status) {
// Wait for the measurement to complete:
delay(status); // Typically 5ms
status = pressure.getTemperature(temp);
if (status) return true;
}
return false;
}
int get_pressure(double &press, double &temp) {
int status;
status = pressure.startPressure(PRESS_OVERSAMPLING);
if (status) {
// Wait for the measurement to complete:
delay(status); // Typically 26 at oversampling 3 in startPressure
status = pressure.getPressure(press, temp);
if (status) return true;
}
return false;
}
const byte buff_len = 90;
char CRCbuffer[buff_len];
byte nmea_crc(String msg) {
// NMEA CRC: XOR each byte with previous for all chars between '$' and '*'
char c;
int i;
byte crc = 0;
for (i = 0; i < buff_len; i++){
crc ^= msg.charAt(i); // XOR
}
return crc;
}
void nmea_send(String sentence, String params) {
String msg = String(NMEA_TALKER_ID) + sentence + params;
msg.toCharArray(CRCbuffer, sizeof(CRCbuffer)); // put complete string into CRCbuffer
int crc = nmea_crc(CRCbuffer);
if (crc < 16) msg += "0"; // pad with leading 0
String hexcrc = String(crc, HEX);
hexcrc.toUpperCase();
Serial.println("$" + msg + "*" + hexcrc);
}
void nmea_txt(String text) {
nmea_send("TXT", ",01,01,01," + text);
}
String s;
double temp, press, seapress;
void loop() {
if (!get_temperature(temp)) {
nmea_txt("Temperature read failure");
temp = -1000.0;
}
if (temp > -1000.0) {
if (get_pressure(press, temp)) {
seapress = pressure.sealevel(press, ALTITUDE);
s = "";
s = ",C," + String(temp) + ",C,TEMP";
s += ",P," + String(press / 1000.0, 5) + ",B,BARO"; // OpenCPN doesn't seem to grok Pascal (unit "P"), only Bar ("B")
nmea_send("XDR", s);
// These NMEA 0183 sentences are deprecated:
//nmea_send("MTA", "," + String(temp) + ",C");
//nmea_send("MMB", ",0.0,I,1.5,B");
} else {
nmea_txt("Pressure read failure");
seapress = 0.0;
}
}
delay(NMEA_DELAY*1000); [COLOR=#000000]}[/COLOR]void setup() { // put your setup code here, to run once:
Serial.begin(4800);
}
void loop() {
// put your main code here, to run repeatedly:
Serial.println("$OSXDR,P,1.0143,B,AIRP,C,18.9,C,AIRT*43");
delay(1000);
}
One thing at a time!
One thing at a time!
Upload the code from message 75 and see if you can get data streaming with some simple code first .