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With the birth of a child there was a question about a nightlight. Somewhere read that it is necessary for a restful sleep. Quickly accustomed to sleep with a dim light. It is very convenient to wake up from screams and howls in the middle of the night and see what the baby is complaining about (if you can understand). Also in dim light, you can soothe, turn over and continue to sleep. 3r33434.  
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First, a test sample of the lamp was made from a piece of yellow LED strip (12 volts), which was used for 1.5 years. 3r33434.  
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In addition to the fragility of the design, it became annoying every morning to remove the power supply of the lamp from the outlet. I get up in the morning, from the street in the room comes enough light. Thus, the lamp is wasted for several hours every day. Once again in half a year, the Chinese controller of the RGB tape forgot the current setting and it was necessary to search for the control panel to remind it how to work. I decided to make a new lamp with automatic shutdown, with color adjustment using potentiometers and radio. 3r33434.  
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Quickly assembled a prototype based on arduino nano. Debugged basic functionality. 3r33434.  
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Taking this opportunity I tried Fritzing. I did not like it, but the pictures are vivid and “funny”. Apparently nothing new has been invented. 3r33434.  
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Replaced the “nano” with a little-known, arduino-compatible module with a built-in radio transceiver (8-bit controller, performance and farsh-erring is comparable to “Nano”). At home, I already have one device running at 868 MHz, this will be the second. Brief specifications from the manufacturer's website:
 
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Brief specifications [/b]
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3r3365. 3r33434.  
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I do not see big problems to do the same on ESP8266 (there is a convenient online firmware builder for LUA scripts). A little harder on Bluetooth (for flashing the HM-10 module you need an inexpensive programmer, an environment for developing and understanding the protocol). Although you can use the Bluetooth module with Arduina. But I used ZUNo, because it’s been waiting for me for a long time, and the entire infrastructure for connecting and managing similar devices to one network is ready (I’m talking about the network controller of a smart home). 3r33434.  
For all used legs on the Arduino there were analogues in the module. 3r33434.  
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3r376. 3r33434.  
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To work with the module from the Arduino IDE you need to configure it (a description of the settings is on the manufacturer's website). The miracle did not happen. When trying to compile, I received the error “doesn't support“ for ”statement with empty columns or without body!”. I used the Adafruit_NeoPixel library. I climbed into it and saw how many cycles it had and closed it. I had to go back to the manufacturer's site and look for examples of working with LEDs (an example was quickly found). So, I'm not the first who faced a similar problem. 3r33434.  
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In order for this lamp to be controlled by radio in the Arduino code you need to add a macro and implement several functions:
 
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ZUNO_SETUP_CHANNELS (
ZUNO_SWITCH_MULTILEVEL (getRed, setRed),
ZUNO_SWITCH_MULTILEVEL (getGreen, setGreen),
ZUNO_SWITCH_MULTILEVEL (getBlue, setBlue),
ZUNO_SWITCH_BINARY (switch_getter, switch_setter)
); 3r33434. 3r33434. 3r33434.  
This macro describes a Z-Wave device with three multi-level switches (RGB control) and one simple switch (simple on /off). 3r33434.  
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I have the simplest implementation of functions (as in the examples on the manufacturer’s website). You can see in the attached listing. 3r33434.  
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Selection of the case

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I already had a case. 3r3114. Sealed with a transparent cover
. Under the cover fit 25 LEDs. The tests were successful. The lamp has a large margin in brightness for my room. The cover of this case is transparent, so I decided to dissipate the light a little. 3r33434.  
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Sketched colored beads and acrylic cubes, filled with transparent epoxy. The paint from the colored beads dissolved under the influence of the resin. 3r33434.  
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The most interesting thing is that the cover from the hermetic case leaked and almost all of the resin leaked. I do not know where I managed to hit the lid, but after drying the crack is clearly visible. 3r33434.  
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3r3138. 3r33434.  
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Printed circuit board made photoresistive. 3r33434.  
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After etching and machining
 
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3r3161. 3r33434.  
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I replaced the module with a microcontroller with its prototype, which was lying in the closet (because it’s not a pity, but you need to take care of ZUNo). The first version of ZUNo, but the dimensions are bigger and worse than the antenna, and you can not buy it already. The tests were more or less successful. The last segment had to be soldered. It was originally soldered to the wrong side. And adjust the number of LEDs in the firmware. 3r33434.  
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3r33170. 3r33434.  
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3r? 3175. 3r33434.  
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Here's what happened:
 
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3r3184. 3r33434.  
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Radio control

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Main window with luminaire control channels
 
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Adjust the brightness of one channel LED strip
 
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Setting the morning off nightlight
 
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Conclusion 3r33247.

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The device is working. It is compact and neat. Powered by charging a mobile phone. 3r33434.  
Of the problems noted:
 
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during assembly, I cut off some of the tracks on variable resistors, so in manual mode only one channel can be controlled.
 
Of the 25 LEDs, only 20 work normally. I have a lot of this, so I will most likely leave it to reveal more serious flaws 3r-3240.  
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Sketch of a night light
#include "ZUNO_NeoPixel.h"
#define MAX_PIXELS 20 //NB! Z-Uno can not control more than 25 WS2811 without harming RF communications
#define PIXEL_SIZE 3 //Three colors per pixel
#define BUFF_SIZE (MAX_PIXELS * PIXEL_SIZE)
byte pixel_buff[BUFF_SIZE];
NeoPixel pixels (pixel_buff, BUFF_SIZE);
#define B_PRESSED 1
#define BUTTON_PIN 1 //Digital IO pin connected to the button. This will be
#define DEF_RED 30
#define DEF_GREEN 20
byte red = DEF_RED;
byte green = DEF_GREEN;
byte blue = 0;
#define POWER_ON 1
#define POWER_OFF 0
byte light_power = POWER_ON;
byte last_light_power = POWER_OFF;
ZUNO_SETUP_CHANNELS (
ZUNO_SWITCH_MULTILEVEL (getRed, setRed),
ZUNO_SWITCH_MULTILEVEL (getGreen, setGreen),
ZUNO_SWITCH_MULTILEVEL (getBlue, setBlue),
ZUNO_SWITCH_BINARY (switch_getter, switch_setter)
);
void switch_setter (byte value)
{
Serial.println ("switch");
Serial.print ("value =");
Serial.println (value);
if (value> 1)
light_power = POWER_ON;
else
light_power = POWER_OFF;
}
byte switch_getter ()
{
return light_power;
}
int getRed () {
return red /???;
}
int getGreen () {
return green /???;
}
int getBlue () {
return blue /???;
}
void setRed (byte value) {
red = value * ???;
for (uint8_t i = 0; i 3r33342. pixels.setPixelColor (i, pixels.Color (red, green, blue));
pixels.show (); 3r3437. Serial.print ("set red =");
.Serial.println (value);
}
Void setGreen (byte value) {
Green = value * ???; 3r34337.for pixels.Color (red, green, blue)); 3r343437; pixels.show ();
Serial.print ("set red =");
Serial.println (value); 3r3437.}
3r3437. void setBlue (byte value) {
blue = value * ???;
for (uint8_t i = 0; i < MAX_PIXELS; i++)
pixels.setPixelColor (i, pixels.Color (red, green, blue));
pixels. show (); 3r3437. Serial.print ("set red ="); 3r3437. Serial.println (value); 3r3437.} 3r3437. 3r3437. void set_LEDS () 3r3437. {3r3437. < MAX_PIXELS; i++)
Pixels.setPixelColor (i, pixels.Color (red, green, blue));
Pixels.show (); 3r3r 3437.}
void read_resistors ()
{
red = (analogRead (A0) 2) & 0xff;
green = (analogRead (A1) 2) & 0xff;
blue = (analogRead (A3) 2) & 0xff;
Serial.print (red);
Serial.print ("");
Serial.print (green);
Serial.print ("");
Serial.print (blue);
Serial.print ("");
Serial.println ();
set_LEDS ();
}
#define DEBOUNCE_ACK 10
byte check_button ()
{
static bool oldState = HIGH;
byte debounce_cnt = 0;
static byte ret = 0;
if (digitalRead (BUTTON_PIN) == LOW)
{
if (ret! = B_PRESSED)
while (digitalRead (BUTTON_PIN) == LOW)
{
if (debounce_cnt == DEBOUNCE_ACK)
{
ret = B_PRESSED;
break;
}
else
debounce_cnt ++;
delay (10);
}
}
else
{
debounce_cnt = 0;
ret = 0;
}
return ret;
}
void setup () {
Serial.begin (9600);
pixels.begin ();
pixels.clear ();
pinMode (BUTTON_PIN, INPUT_PULLUP);
}
void loop ()
{
if (check_button () == B_PRESSED)
read_resistors ();
if (last_light_power! = light_power)
{
Serial.println ("set power");
if (light_power == POWER_OFF)
{
Serial.println ("power off");
red = 0;
green = 0;
blue = 0;
}
else
{
Serial.println ("power on");
red = DEF_RED;
green = DEF_GREEN;
blue = 0;
}
set_LEDS ();
last_light_power = light_power;
}
} 3r33434. 3r33434.  
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