Chinese Solar Lipo powered PIR led lamp.

[gyro]

@GertSanders I think i managed to successfully connect arduino with solar lamp.

My prototype is working, and has the following functions:

1. Measure battery voltage (when charging it is alway 100% - makes sense)
2. Measure solar voltage (can be omitted - but resistor should be there for a transistor to work properly)
3. Solar power day/night trigger with transistor as a switch (can be used wake up arduino from sleep)
4. PIR sensor (can be used wake up arduino from sleep)
5. Lights on/off dimmed brightness
6. Lights on/off high brightness ( original resistor R9 -1k was replaced with 4.7k - i think it draws to much current and sometimes hangs arduino)

I will post the code later, but every part works with default "mysensor" examples

How to connect and how to add elements see picture:

[GertSanders]

@gyro
Very nice work !!!!

[Dylano]

higher math for me...
Great...

Can you use the motion seperate from the liight?
And can u use the light with a switch option? [ i will turn on the light when there is motion.. ]
Or is the light switching only on lux?

[gyro]

@GertSanders thanks, you have motivated my research

@Dylano the purpose of this project was exactly what you have asked.

The lamp is now mysensors aware.
Every task can be operated separately.

• When there is dark, the trigger is send, when the sun shines, the trigger is send. (transistor as switch). In scetch i use it as magnet switch part of code. When trigger is received (can wake up arduino), than you decide with controller what you want to do .

• PIR acts as classic PIR sensor and can also be used as trigger. (can wake up arduino), than you decide with controller what you want to do.

• The Lamp have two phases and can be controlled with controller (i control it over mqtt for now)

• phase one is dimmed light (relay 1)

• phase two is high bright light (relay 2)

Below is code that works for now. I wil improve it in next few days

// Enable debug prints
#define MY_DEBUG
#define MY_NODE_ID 11 
// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69

#include <SPI.h>
#include <MySensor.h>
#include <Bounce2.h>

//unsigned long SLEEP_TIME = 120000; // Sleep time between reports (in milliseconds)
#define DIGITAL_INPUT_SENSOR 2   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
//#define INTERRUPT DIGITAL_INPUT_SENSOR-2 // Usually the interrupt = pin -2 (on uno/nano anyway)
#define CHILD_ID 12   // Id of the sensor child

boolean lastMotion = false;

// Initialize motion message - start
MyMessage msg(CHILD_ID, V_TRIPPED);

//trigger solar power day on/off -start
#define CHILD_ID_SW 5
#define BUTTON_PIN  5  // Arduino Digital I/O pin for button/reed switch
Bounce debouncer = Bounce();
int oldValue = -1;

// Change to V_LIGHT if you use S_LIGHT in presentation below
MyMessage SolarMsg(CHILD_ID_SW, V_TRIPPED);
// trigger solar - end

#define RELAY_1  3  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)
#define NUMBER_OF_RELAYS 2 // Total number of attached relays
#define RELAY_ON 1  // GPIO value to write to turn on attached relay
#define RELAY_OFF 0 // GPIO value to write to turn off attached relay

void setup()
{
	//trigger solar power day on/off - start
	// Setup the button
	pinMode(BUTTON_PIN, INPUT);
	// Activate internal pull-up
	digitalWrite(BUTTON_PIN, HIGH);

	// After setting up the button, setup debouncer
	debouncer.attach(BUTTON_PIN);
	debouncer.interval(5);
	//trigger solar - end


	pinMode(DIGITAL_INPUT_SENSOR, INPUT);      // sets the motion sensor digital pin as input

	for (int sensor = 1, pin = RELAY_1; sensor <= NUMBER_OF_RELAYS; sensor++, pin++) {
		// Then set relay pins in output mode
		pinMode(pin, OUTPUT);
		// Set relay to last known state (using eeprom storage) 
		digitalWrite(pin, loadState(sensor) ? RELAY_ON : RELAY_OFF);
	}
}

void presentation() {
	// Send the sketch version information to the gateway and Controller
	sendSketchInfo("Motion Sensor and light", "1.0");

	// Register all sensors to gw (they will be created as child devices)
	present(CHILD_ID, S_MOTION);
	for (int sensor = 1, pin = RELAY_1; sensor <= NUMBER_OF_RELAYS; sensor++, pin++) {
		// Register all sensors to gw (they will be created as child devices)
		present(sensor, S_LIGHT);

		// Register binary input sensor to gw (they will be created as child devices)
		// You can use S_DOOR, S_MOTION or S_LIGHT here depending on your usage. 
		// If S_LIGHT is used, remember to update variable type you send in. See "msg" above.
		present(CHILD_ID_SW, S_DOOR);
	}
}

void loop()
{
	// Read digital motion value
	boolean tripped = digitalRead(DIGITAL_INPUT_SENSOR) == HIGH;

	if (lastMotion != tripped) {
		Serial.println(tripped);
		lastMotion = tripped;
		send(msg.set(tripped ? "1" : "0"));  // Send tripped value to gw 
	}
	// Sleep until interrupt comes in on motion sensor. Send update every two minute. 
	//sleep(INTERRUPT,CHANGE, SLEEP_TIME);

	//trigger solar power day on/off - start
	debouncer.update();
	// Get the update value
	int value = debouncer.read();

	if (value != oldValue) {
		// Send in the new value
		send(SolarMsg.set(value == HIGH ? 1 : 0));
		oldValue = value;
	//trigger solar power day on/off - stop
	}
}

void receive(const MyMessage &message) {
	// We only expect one type of message from controller. But we better check anyway.
	if (message.type == V_LIGHT) {
		// Change relay state
		digitalWrite(message.sensor - 1 + RELAY_1, message.getBool() ? RELAY_ON : RELAY_OFF);
		// Store state in eeprom
		saveState(message.sensor, message.getBool());
		// Write some debug info
		Serial.print("Incoming change for sensor:");
		Serial.print(message.sensor);
		Serial.print(", New status: ");
		Serial.println(message.getBool());
	}
}```

[Dylano]

mmm i ordered 1...
So i hope i gonna ix this...
It is looking higher mathematics

Will see... when i have time..
Thanks for the sketch!!!
Give it a try in a uno ...

[Dylano]

guess what...
I do have a:
http://www.ebay.com/itm/161885080971?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Exact the same board in of this light...
I think i going to try the make this work...

Only i do not understand exact the wiring of your example.
Will you please make a list of exact stuff to buy.
And make some more pictures, from the good places..

And a thing that i see.
You use D2 from the arduino.
Is that not a one for the radio?

[siklosi]

@gyro is there a reason you used high/low intensity with resistor instead of PWM?

[gyro]

@siklosi Resistor is used as transisistor base resistor. This was the best way to connect i could think off. But you need two output pins - 2 transistors are controlled.
first PIN - lights ON/OFF
second PIN - ligths bright ON/OFF

[gyro]

@Dylano Great to hear that the light has the same board...please post a picture.
My light is still protoype connected together on protoboard - connected to arduino pro mini - i can post only a picture connected elements on protoboard for now.
I am trying to put all together in openhab now.
I will try to make a list of exact elements.
I have free D2 pin on arduino pro mini.

[readykal]

As the easiest way to disable dimmed mode this lamp?

[korttoma]

Got myself a similar PIR LED lamp. The functionality seems like it is the same but the circuit board is different.

[gyro]

@korttoma
Nice to see some interest in smart solar lamps :)
It looks like an updated version (at least i like it more from your pictures). Could you post an order link.
I think this one should be even easier to intercept with "mysensors", beacause i see only two transistors and circuit connectios are clearly visible.

so lets try to understand the circuit:
-U3 is probably battery protection circuit

• Q1 i think is voltage regulator HT33 - to power arduino wih 3.3V (meassure voltage)
• take a photo of PIR sensor from front side (is there any ic elements)?
• U1 - i would guess PIR sensor IC logic - leg 6 (count from dot on IC) should be output (meassure voltage - high 3,3 V when motion detected):
  -if it is output from PIR just remove R3 and IC ouput goes over resistor to you arduino input.
• the output goes over resistor to Q2
  -whats is left - you have to figure out what drives resistor Q1(J3y) :
• i gues its driven by solar cell, than collector is connected to resistor R10, resesitor is than connected over board to the other side.......

[korttoma]

I guess you meant U4 is the 3.3V regulator. I measured it to 3.3V and HT33 should be a regulator. Q1 and Q2 I think are transistors. U3 handles the solar charging. U1 is for the PIR but unfortunately there is no text on the chip. I will get you the link tomorrow but it is quite easy to find on aliexpress.

[gyro]

@korttoma
sorry my typo: you are correct

• U4 - HT33 is voltage regulator
• yes Q1 and Q2 are transistors
• U1 - PIR out test - measure voltage between PIN 6 and R3 when PIR is OF and ON. I think this drives Q2 (high brightness / low brightnes)

also take picture of other side of circuit board, beause i think Q1 is conected to R10 and
then further on the other side

[korttoma]

Here is the link to the one I got but it seems like the prize is allot higher now since I paid 23,84$ including shipping -> http://www.aliexpress.com/item/1-Set-1200-Lumens-46-pcs-LED-Solar-Power-Motion-Sensor-Lamp-Ultra-thin-PIR-Outdoor/32354254209.html

Also it took like 10 weeks for it to arrive so maybe another seller would be a better fit.

[korttoma]

There is not much on the other side of the board, just a status LED, a button to turn it on and the PIR.

[gyro]

@korttoma
Are you sure that this light has two modes of operation or only one: when a person is present is activated for 15s and then switched off

[korttoma]

I'm sorry I did not test the device I just read the manual so I think that yes it has 2 modes for LED brightness.

[gyro]

@korttoma
Don't be sorry.I am not an circuits expert, I just try help you figure things out.
You wil have to test this lamp a little bit.
it looks that Q1 drives U1 active/not active when there is sun, but how/what turns on dimm lights in dark?

Did you measure U1 pin 6 when pir active/not active?

[korttoma]

In the application I will use this one I actually do not care so much for the built in PIR and LED, I just see it as a smart enclosure with a solar battery power-supply built in. I will tap in to the 3.3V regulator to power a pro mini that has an external PIR and (LDR) Light sensor. In addition to this I would like to add voltage measurement for the battery. BTW, did you komplette your sketch? I would like to copy the battery voltage sensor part. I will look att figuring out the circuit later, it does not look to complicated.