For my battery powered water leak nodes I wanted to add a clear lens to be able to see communication LED status on Arduino Pro Mini while maintaining reasonable water protection. The quick no cost solution was:
sundberg84 Don't bother, I went through the hassle, downloaded Eagle and created readable PDF
@tbowmo Thank you, supercap idea works fine, my first experience with supercaps.
Sure, the curve is there. I am trying to make sense out of two points curve that is used in sketch for MQ2 sensor, CO gas. "point1: (lg200, 0.72), point2: (lg10000, 0.15)" while I see on the curve from datasheet (lg200, 5.2) and (lg10000, 1.3). That is why I am asking for help, sorry for not making it clear.
I think that it will be useful to put together some kind of functional guide pointing the user in which mySensors example the specific function or feature is implemented, for example: sending floating number, digital input debouncing algorithm, battery saving, node to node communication, GW to node communication, minimizing traffic between node and GW, etc.
Lack of support makes you think, so I figured out the "hidden" calculations in the sketch above and proposing the code modification to allow users to port the code to a different gas sensor using data taken directly from the sensor chart. Here are modified fragments of the code showing only CO curve for MQ2 sensor:
float CO2Curve[4] = {0.8,200,2.2,10};
//two end points are taken from the curve with two coordinates for each point
//in form of{Y1, X1,Y2, X2) where X is PPM axis, Y is Rs/Ro axis from the sensor chart for specifc gas
//then equation X=(Y-b)/m is used,
//where m is slope of the curve, b is Y axis intersept point
float Slope = (log(pcurve(1)-log(pcurve(0))/(log(pcurve(3)-log(pcurve(2));
float Y_Intercept=log(pcurve(1)-Slope*log(pcurve(3);
int MQGetPercentage(float rs_ro_ratio, float *pcurve)
{
{ return (pow(10,((log(rs_ro_ratio)-Y_Intercept)/Slope))); }
}
Does enabled myDebug and some Serial.print statements (with serial port disconnected) affect power consumption of the node?
@TheoL Please see attached stripped version of @pjjarzembowski code. I see that gesture is being detected, attempted to reduce number of light levels to 5. Having trouble with detecting UP and DOWN gestures - not always happening. Trying to understand how dimmer works.
/****************************************************************
Title: MySensors enabled, gesture controlled lamp.
This lamp can be turned on/off, and dimmed by gestures. And it can be controlled by any Home Automation
system, that can talk with MySensors.
Supported gesture:
1. Left to right stroke: turns lamp on
2. Right to left stroke: turns lamp off
3. Down to up stroke: increases brightness (When brightness is already at max, the lamp will blink - duration and blink count can be changed in the sketch)
4. Up to down stroke: decreases brgihtness (When brightness level is at 0 the lamp is off)
The gesture sensor used in this Sketch is an APDS-9960 RGB and Gesture Sensor, sold by SparkFun. They can be found on eBay and Aliexpress as well.
See Sparkfuns hookup guide for pin lay-out ( https://learn.sparkfun.com/tutorials/apds-9960-rgb-and-gesture-sensor-hookup-guide )
IMPORTANT: The APDS-9960 can only accept 3.3V! Use bi direction level converter when using another Arduino than a Pro Mini 3.3V
This Sketch is based upon the GestureTest exampl developped by,
Shawn Hymel @ SparkFun Electronics on May 30, 2014. See https://github.com/sparkfun/APDS-9960_RGB_and_Gesture_Sensor
The lamp itself is a white LED strip, controlled by an N channel MOSFET.
Fore more details on the used hardware and libraries (see https://www.openhardware.io/view/50/Gesture-controlled-MySensors-Floor-lamp )
Revision history:
25-1-2021 Version 2.1 Stripped from everything except gesture and light control.
3-07-2017 Version 2 by pjjarzembowski
- Changed for tests on Mysensors 2.0
20-03-2016 Version 1.1 by Theo:
- set the brightness level to defined BRIGHTNESS_INCREMENT, when lamp is being turned on be a gesture and the current brightness level is 0.
This was a little bug in previous version. It sometimes seemed that the APDS didn't work, but in some cases I had to increase brightness after
I turned the lamp on.
- cleaned up the code a bit
19-03-2016 Version 1.0 by Theo
- Developed and test with MySensors release 1.5.4
****************************************************************/
// Import libraries used by the Sketch.
// added some of my radio definitions (must be before #includes)
#define MY_DEBUG
#define MY_RADIO_RF24
#define MY_NODE_ID 27
//#include <SPI.h>
#include <MySensors.h>
#include <Wire.h>
#include <SparkFun_APDS9960.h>
// Constants declaration(s)
#define APDS9960_INT 2 // Needs to be an interrupt pin. We should be able to use the Arduino's pin 3 as well.
#define LED_PIN 3 // The led PWM pin, that drives the LED strip. This is the pin thats attached to the mosfet.
#define MAXDIMLEVELS 6 // The maximum number of dim levels. Domoticz supports 0-100 (we'll transalate thim in an array)
#define BRIGHTNESS_INCREMENT 20 // Dimmer increment for gesture(s). Play with this value yourself. The amount of gesture controlled
// dim levels is MAXDIMLEVELS / BRIGHTNESS_INCREMENT having 8 to 5 levels feels more natural to me.
#define MAX_LEVEL_REACHED_DELAY 150 // Short blinking delay when increasing the dimmer while the dimmer is already at max
// Had some troubles in the past with tha acurateness of the gw.wait on pro mini's. But that'll probably
// not be noticeable with this short delay. Delay is in milliseconds
#define MAX_LEVEL_REACHED_SIGNAL_COUNT 2 // The amount of blinks, when the max dim level already has been reached. It's just a way to let the user know
// that the lamp can not be more brighter than the current brightness
#define CHILD_ID_LIGHT 1 // The child id of the Node. Only one Node on this sensor though. See MySensors documentation
#define LIGHT_OFF 0 // Constant indicating the lamp on state
#define LIGHT_ON 1 // Constant indicationg light off state
// Global Variables
SparkFun_APDS9960 apds = SparkFun_APDS9960(); // Initialize a SparkFun_APDS9960 object. This does all the magic incl. i2c communication with the sensor.
int isr_flag = 0; // interrupt flag, triggered when a gesture has been dectected. Used to detect gesture detection in the interrupt handler
// the actual handling is done in the main loop. This allows is the keep the interrupt handler is lightweight is possible
// which is a good practice. Otherwise you'll get some behaviour you don't expect.
int LastLightState=LIGHT_OFF; // The current lamp state. Wel'll turn it off for first time useage. The Sketch will query your Home Automation System for
// the last value when it's being reboot.
int LastDimValue=MAXDIMLEVELS; // last known dim value (Only initial value. Value is retrieved from your HA system)
int dimlevels[ MAXDIMLEVELS ] = // PWM values used for translating home automation dimmer levels. This gives smoother transations
{ 0, 50, 100, 150, 200, 255};
MyMessage lightMsg(CHILD_ID_LIGHT, V_LIGHT);
MyMessage dimmerMsg(CHILD_ID_LIGHT, V_DIMMER);
// interrupt handler. Is being triggered by the gesture sensor whenever a gesture has been detected. We've setup this up in the setup.
void interruptRoutine() {
isr_flag = 1;
}
void presentation()
{
sendSketchInfo("Led with Gesture", "2.0");
present(CHILD_ID_LIGHT, S_DIMMER);
}
void setup() {
pinMode( LED_PIN, OUTPUT );
// APDS Initialization code
pinMode(APDS9960_INT, INPUT); // Set interrupt pin as input. @@Note: this should be handled my the library. But it isn't
attachInterrupt(0, interruptRoutine, FALLING); // Initialize interrupt service routine. Basicly it'll call our interrupt routine
if ( apds.init() ) { // Initialize APDS-9960 (configure I2C and initial values)
// @@NOTE: original value is two. But it looks like the modern gesture sensor more sensitive. 1 does it for me
apds.setGestureGain( 2 );
}
if ( apds.enableGestureSensor(true) ) { // Start running the APDS-9960 gesture sensor engine. Sensor support more functions than gesture detection only.
analogWrite( LED_PIN, 0 ); // Turn the lamp off.
// Request current dimvalue. The current value is being handled in the incomming method.
request( CHILD_ID_LIGHT, V_PERCENTAGE ); // Request current dimvalue from HA. The current value is being handled in the incomming method.
// Request current lamp state. The current value is being handled in the incomming method.
request( CHILD_ID_LIGHT, V_STATUS ); // Request current lamp state from HA. The current value is being handled in the incomming method.
}
}
// Main loop. Does two things. Handle gestures if detected by the interrupt routine. And give the MySensors lib the oppurtunity to handle incomming messages.
void loop()
{
if( isr_flag == 1 ) {
detachInterrupt(0);
handleGesture();
isr_flag = 0;
attachInterrupt(0, interruptRoutine, FALLING);
}
}
// Determine gesture and handle accordingly.We'll ignore FAR and NEAR gestures. Didn't feel natural to me anyway.
void handleGesture() {
if ( apds.isGestureAvailable() ) { // Check if there's a gesture available. Which should be, because the interrupt handler told us so.
switch ( apds.readGesture() ) { // Get the gesture type.
case DIR_UP: // Handle up stroke (Brightness increasing)
Serial.println ("DIR_UP");
if ( LastDimValue + BRIGHTNESS_INCREMENT > ( MAXDIMLEVELS - 1 ) ) {
for ( int i = 0; i < MAX_LEVEL_REACHED_SIGNAL_COUNT; i++ ) {
analogWrite( LED_PIN, dimlevels[ 0 ] );
wait( MAX_LEVEL_REACHED_DELAY );
analogWrite( LED_PIN, dimlevels[ MAXDIMLEVELS - 1 ] );
wait(MAX_LEVEL_REACHED_DELAY );
}
LastDimValue = ( MAXDIMLEVELS - 1 );
}
else {
LastDimValue += BRIGHTNESS_INCREMENT;
}
LastLightState = LIGHT_ON;
SetCurrentState2Hardware();
break;
case DIR_DOWN: // Handle down stroke (Brightness decreasing)
Serial.println ("DIR_DOWN");
if ( LastDimValue - BRIGHTNESS_INCREMENT <= 0 ) {
LastDimValue = 0;
}
else {
LastDimValue -= BRIGHTNESS_INCREMENT;
}
if ( LastDimValue == 0 ) {
LastLightState = LIGHT_OFF;
}
else {
LastLightState = LIGHT_ON;
}
SetCurrentState2Hardware();
break;
case DIR_LEFT: // Handle left stroke. Turn lamp off
Serial.println ("DIR_LEFT");
LastLightState = LIGHT_OFF;
SetCurrentState2Hardware();
break;
case DIR_RIGHT: // Handle right stroke. Turn lamp on
Serial.println ("DIR_RIGHT");
LastLightState = LIGHT_ON;
if ( LastDimValue == 0 ) { // @@Version 1.1 addition Slight modification. When the dimValue was 0, the light stayed off when turned on.
LastDimValue = BRIGHTNESS_INCREMENT; // Just used the first Gesture dimming stage (2 times would be better for my taste though. Might change that in the future)
}
SetCurrentState2Hardware();
break;
}
}
}
/**
* Handler for message send by the MySensor gateway.
*/
void receive(const MyMessage &message) {
//if ( message.type == V_LIGHT ) { // Gateway reports a new Light state
if ( message.type == V_STATUS ) { // Gateway reports a new Light state
int lstate= atoi( message.data );
if ( ( lstate < 0 ) || ( lstate > 1 ) ) {
return;
}
LastLightState=lstate;
if ( ( LastLightState == LIGHT_ON ) &&( LastDimValue == 0 ) ) {
//In the case that the Light State = On, but the dimmer value is zero, then something (probably the controller) did something wrong,
//for the Dim value to 100%
LastDimValue = 100;
}
//When receiving a V_LIGHT command we switch the light between OFF and the last received dimmer value
//This means if you previously set the lights dimmer value to 50%, and turn the light ON
//it will do so at 50%
}
//else if (message.type == V_PERCENTAGE) { // Gateway reports new dimmer level. We'l adjust it to the new value
else if (message.type == V_DIMMER) { // Gateway reports new dimmer level. We'l adjust it to the new value
int dimvalue= atoi( message.data );
if ( ( dimvalue < 0 ) || ( dimvalue > 100 ) ) {
return;
}
if ( dimvalue == 0 ) {
LastLightState = LIGHT_OFF;
}
else {
LastLightState = LIGHT_ON;
LastDimValue = dimvalue;
}
}
SetCurrentState2Hardware(); //Here we'll set the actual light state/level
}
void SetCurrentState2Hardware() { // Send current values to the PWM controlled MOSFET
if (LastLightState==LIGHT_OFF) {
analogWrite( LED_PIN, dimlevels[0] );
Serial.print ("DIMELEVELS ");
Serial.println (dimlevels[LastDimValue] );
}
else {
analogWrite( LED_PIN, dimlevels[ LastDimValue - 1 ] );
}
SendCurrentState2Controller(); //Send current state to the controller
}
void SendCurrentState2Controller() // Report new values to the Gateway
{
if ((LastLightState==LIGHT_OFF)||(LastDimValue==0)) {
send(dimmerMsg.set(0));
}
else {
send(dimmerMsg.set(LastDimValue));
}
}
@TheoL Agree, my project is for kitchen for under the cabinets lights, so I can't imagine my wife adjusting brightness, may be 2-3 levels would be sufficient. Current slider dimmer is set to one position...
@TheoL Sorry, I though that I deleted multiple posts. I understand about stripping the code, this is what I am trying to do, just got a bit confused between parts of the code responsible for measuring and controlling the light (similar variable names, etc.). Thanks for the idea about reducing number of light levels, totally make sense. My personal take on this project would be having gesture controller physically separate from the light controller with mySensors node to node communication between. May I ask you why you don't use this setup anymore? FYI, I use ioBroker as controller and happy with it (most of the time)
@mfalkvidd Thank you, I will donate 168P to some other Arduino enthusiast.
Hello. Can somebody publish working code just for gesture and LED dimming with latest mySensors library? Thank you.
Sketch uses 13634 bytes (95%) of program storage space. Maximum is 14336 bytes. Global variables use 731 bytes (71%) of dynamic memory, leaving 293 bytes for local variables. Maximum is 1024 bytes.
I noticed parsing error in my controller log and switched to 328P. I bought 168P by mistake and wondering how I can use it. Does simple mySensors node require less ROM/RAM than gateway?
Can serial gateway be build on Atmel 168 chip instead of 328 in terms of memory? It compiles fine, but leaves little extra memory for variables.