Hello,
I have the oximeter sensor MAX30100 and I would like to display for instance the infrared curv on the Wio Terminal. I already have managed to print the SpO2 and heart value, but I also would like the curv. For that, I have been trying to mix the 2 example codes basic from Seeed Arduino Linechart library and RawData from MAX30100lib library.
- basic example from Seeed Arduino Linechart
#include"seeed_line_chart.h" //include the library
TFT_eSPI tft;
#define max_size 30 //maximum size of data
doubles data; //Initilising a doubles type to store data
int brightness;
TFT_eSprite spr = TFT_eSprite(&tft); // Sprite
void setup() {
pinMode(A0, INPUT);
tft.begin();
spr.createSprite(TFT_HEIGHT,TFT_WIDTH);
spr.setRotation(3);
tft.setRotation(3);
}
void loop() {
spr.fillSprite(TFT_WHITE);
brightness = analogRead(A0);
if (data.size() == max_size) {
data.pop();//this is used to remove the first read variable
}
data.push(brightness); //read variables and store in data
//Settings for the line graph title
auto header = text(0, 0)
.value("Light Sensor Readings")
.align(center)
.valign(vcenter)
.width(tft.width())
.thickness(2);
header.height(header.font_height() * 2);
header.draw(); //Header height is the twice the height of the font
//Settings for the line graph
auto content = line_chart(20, header.height()); //(x,y) where the line graph begins
content
.height(tft.height() - header.height() * 1.5) //actual height of the line chart
.width(tft.width() - content.x() * 2) //actual width of the line chart
.based_on(0.0) //Starting point of y-axis, must be a float
.show_circle(false) //drawing a cirle at each point, default is on.
.value(data) //passing through the data to line graph
.color(TFT_RED) //Setting the color for the line
.draw();
spr.pushSprite(0, 0);
delay(100);
}
- RawData from MAX30100lib library
/*
Arduino-MAX30100 oximetry / heart rate integrated sensor library
Copyright (C) 2016 OXullo Intersecans <x@brainrapers.org>
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 <http://www.gnu.org/licenses/>.
*/
// The example shows how to retrieve raw values from the sensor
// experimenting with the most relevant configuration parameters.
// Use the "Serial Plotter" app from arduino IDE 1.6.7+ to plot the output
#include <Wire.h>
#include "MAX30100.h"
// Sampling is tightly related to the dynamic range of the ADC.
// refer to the datasheet for further info
#define SAMPLING_RATE MAX30100_SAMPRATE_100HZ
// The LEDs currents must be set to a level that avoids clipping and maximises the
// dynamic range
#define IR_LED_CURRENT MAX30100_LED_CURR_50MA
#define RED_LED_CURRENT MAX30100_LED_CURR_27_1MA
// The pulse width of the LEDs driving determines the resolution of
// the ADC (which is a Sigma-Delta).
// set HIGHRES_MODE to true only when setting PULSE_WIDTH to MAX30100_SPC_PW_1600US_16BITS
#define PULSE_WIDTH MAX30100_SPC_PW_1600US_16BITS
#define HIGHRES_MODE true
// Instantiate a MAX30100 sensor class
MAX30100 sensor;
void setup()
{
Serial.begin(115200);
Serial.print("Initializing MAX30100..");
// Initialize the sensor
// Failures are generally due to an improper I2C wiring, missing power supply
// or wrong target chip
if (!sensor.begin()) {
Serial.println("FAILED");
for(;;);
} else {
Serial.println("SUCCESS");
}
// Set up the wanted parameters
sensor.setMode(MAX30100_MODE_SPO2_HR);
sensor.setLedsCurrent(IR_LED_CURRENT, RED_LED_CURRENT);
sensor.setLedsPulseWidth(PULSE_WIDTH);
sensor.setSamplingRate(SAMPLING_RATE);
sensor.setHighresModeEnabled(HIGHRES_MODE);
}
void loop()
{
uint16_t ir, red;
sensor.update();
while (sensor.getRawValues(&ir, &red)) {
Serial.print(ir);
Serial.print('\t');
Serial.println(red);
}
}
Here is one my attempt :
/*
Arduino-MAX30100 oximetry / heart rate integrated sensor library
Copyright (C) 2016 OXullo Intersecans <x@brainrapers.org>
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 <http://www.gnu.org/licenses/>.
*/
// The example shows how to retrieve raw values from the sensor
// experimenting with the most relevant configuration parameters.
// Use the "Serial Plotter" app from arduino IDE 1.6.7+ to plot the output
#include <Wire.h>
#include "MAX30100.h"
#include "seeed_line_chart.h" //include the library
TFT_eSPI tft;
//for the plot
#define max_size 30 //maximum size of data
doubles data; //Initilising a doubles type to store data
int brightness;
TFT_eSprite spr = TFT_eSprite(&tft); // Sprite
// Sampling is tightly related to the dynamic range of the ADC.
// refer to the datasheet for further info
#define SAMPLING_RATE MAX30100_SAMPRATE_100HZ
// The LEDs currents must be set to a level that avoids clipping and maximises the
// dynamic range
#define IR_LED_CURRENT MAX30100_LED_CURR_50MA
#define RED_LED_CURRENT MAX30100_LED_CURR_27_1MA
// The pulse width of the LEDs driving determines the resolution of
// the ADC (which is a Sigma-Delta).
// set HIGHRES_MODE to true only when setting PULSE_WIDTH to MAX30100_SPC_PW_1600US_16BITS
#define PULSE_WIDTH MAX30100_SPC_PW_1600US_16BITS
#define HIGHRES_MODE true
// Instantiate a MAX30100 sensor class
MAX30100 sensor;
uint16_t vIR, vR; //valeur IR, valeur IR
void setup()
{
Serial.begin(115200);
Serial.print("Initializing MAX30100..");
// Initialize the sensor
// Failures are generally due to an improper I2C wiring, missing power supply
// or wrong target chip
if (!sensor.begin()) {
Serial.println("FAILED");
for(;;);
} else {
Serial.println("SUCCESS");
}
// Set up the wanted parameters
sensor.setMode(MAX30100_MODE_SPO2_HR);
sensor.setLedsCurrent(IR_LED_CURRENT, RED_LED_CURRENT);
sensor.setLedsPulseWidth(PULSE_WIDTH);
sensor.setSamplingRate(SAMPLING_RATE);
sensor.setHighresModeEnabled(HIGHRES_MODE);
tft.begin();
spr.createSprite(TFT_HEIGHT,TFT_WIDTH);
spr.setRotation(3);
tft.setRotation(3);
}
void loop()
{
spr.fillSprite(TFT_WHITE);
sensor.update();
if (sensor.getRawValues(&vIR, &vR))
{
Serial.print(vIR);
Serial.print('\t');
Serial.println(vR);
brightness = vIR;
if (data.size() == max_size) {
data.pop();//this is used to remove the first read variable
}}
data.push(brightness); //read variables and store in data
//Settings for the line graph title
auto header = text(0, 0)
.value("PPG wave")
.align(center)
.valign(vcenter)
.width(tft.width())
.thickness(2);
header.height(header.font_height() * 2);
header.draw(); //Header height is the twice the height of the font
//Settings for the line graph
auto content = line_chart(20, header.height()); //(x,y) where the line graph begins
content
.height(tft.height() - header.height() * 1.5) //actual height of the line chart
.width(tft.width() - content.x() * 2) //actual width of the line chart
.based_on(6600) //Starting point of y-axis, must be a float
.show_circle(false) //drawing a cirle at each point, default is on.
.value(data) //passing through the data to line graph
.color(TFT_RED) //Setting the color for the line
.draw();
spr.pushSprite(0, 0);
//delay(100);
}
However I haven't managed to make it work. Each example work separately.
I have noticed some points:
- The printing instructions from the
void setup
of RawData example likeSerial.print("Initializing MAX30100..");
do not seem to get executed even if the rest of the program seems to work. - the while loop inside the
void loop
in RawData is executing 5 times in eachvoid loop ()
. I think we can replace thewhile
by aif
.
Besides I am not sure how to understand exactly the line TFT_eSprite spr = TFT_eSprite(&tft); // Sprite
in the basic example even if I kind of manage to get it.
Does anyone have an idea of how to make the global program working?
Thanks for reading,