Posts made by icebob

@fabyte awesome job. I'm working something similar. Could you share your main program code?

@tomkxy I'm using this one: http://hu.farnell.com/multicomp/mcvz1206m050agt/varistor-multilayer-4vac-0402/dp/2462756

Good job!

@barduino Thx, good job!

Use V_LEVEL

MyMessage msgSmoke(CHILD_ID_SMOKE, V_LEVEL); 

Good job. I found a bug. I can't select the link in the BOM list. Google Chrome v47

Hi,

I now received PCBs from DirtyPCB. I'm searching components (but not from China sellers).
Can I use this varistor on the AC side?: http://uk.farnell.com/multicomp/mcsr391k10ds/varistor-60j-250vrms/dp/1856880
And on the DC side?: http://uk.farnell.com/multicomp/mcvz1206m050agt/varistor-multilayer-4vac-0402/dp/2462756

Thanks in advance!

@scalz: thank you for you calculation. It's interesting. I will measure it if I receive the MCP16251.

@the-cosmic-gate Nothing special. I made a big sketch, which contains 7-8 sensors (DHT, Si7021, MQ-2/9, PIR, Door magnet, Light, battery) reading code because I would like to upload the same sketch to all nodes and configurate it on controller side, which sensors is on the node and need to read.
But currently I reached the limit with I2C includes, so I need to think over this solution.

@ericvdb Sorry, I read somethingh wrong

On my custom node PCB, I will use MCP16251 chip to boost supply to 3.3V.
http://ww1.microchip.com/downloads/en/DeviceDoc/25173A.pdf

By docs, If I use it from one AA battery (1.5V), the efficiency is ~80%, consumes ~14uA. I think it is not bad.

@ericvdb great observation. But this board is not an MCP1702, because MCP1702 is a voltage regulator IC

@the-cosmic-gate sorry, I'm working a big complex sketch, I can't share my code currently.

Yes, the controller is in the cloud. Mama board is just a gateway device http://www.riots.fi/p/mama-riots.html
In this case, you need live internet connection to check the sensor data.

Nothing extra solution.

http://www.riots.fi/p/riots-core.html

Riots Core contains:

• Atmel ATmega328P MCU
• RGB LED
• nRF24L01+ radio module

Maybe they will use mySensors for communication?

I found now. Riots on KickStarter. RF based battery powered mini IoT Arduino compatible devices. Similar crowfunding IoT project like what we are doing here in this forum.
It seems they want to power with button-cell battery. I'm curious they will be able to solve this low power problem (it's contiuous problem in this forum) or will need to change the battery monthly

Currently I'm developing my boards, so there is no live device/sensor in my home. But in the future I plan to make a custom controller, and it will turn on/off the PIR sensors on the nodes, depending on the house is armed or not. So if I'm at home, PIR sensor won't watching. (It's just a plan for the present)

@ericvdb http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2680&dDocName=en545243. It's specified for PIC, but I select SLEEP mode in every cycle, so I can use for any uC.

@carlierd: I have no extra secret. If I measure 3-4 sensor and every values is changed, the loop time is 100ms. Best case is 10-20ms (if every sensors is unchanged). I'm not using delay in the loop.

@the-cosmic-gate Now I measured my dev circuit (Arduino Nano from China (cutted power led and desoldered regulator) + DHT22 + PIR + Battery measure resistor divider) and in gw.sleep (with 1 interrupt for PIR) the power comsumption is ~90uA.

It wakes up every minutes, measuring and sending (~100ms and 5 - 20mA).
So 100ms with 20mA and 59900ms with 0.09mA. The average current is 120uA and with 2 AA battery it is about 2 years.

Yes, I can.

This is the definition of message for battery level:

// Battery sensor (A0)
#define CHILD_ID_BATTERY 199
#define BATTERY_SENSOR_ANALOG_PIN 0
MyMessage msgBattery(CHILD_ID_BATTERY, V_VOLTAGE);

And this is the sender function:

// 1M, 470K divider across battery and using internal ADC ref of 1.1V
// Sense point is bypassed with 0.1 uF cap to reduce noise at that point
// ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
// 3.44/1023 = Volts per bit = 0.003363075
#define VBAT_PER_BITS 0.003363075
#define VMIN 1.9  // Battery monitor lower level. Vmin_radio=1.9V
#define VMAX 3.00  // Vmin<Vmax<=3.44
#define VCC_CORRECTION (3.4 / 3.33)
int lastBatteryLevel;

bool sendBatteryLevel(bool force = false) {
  int value = analogRead(BATTERY_SENSOR_ANALOG_PIN);

  float batVoltage  = value * VBAT_PER_BITS / VCC_CORRECTION;
  int batLevel = static_cast<int>(((batVoltage-VMIN)/(VMAX-VMIN))*100.);
  if (batLevel != lastBatteryLevel || force) {
    gw.sendBatteryLevel(batLevel);
    gw.send(msgBattery.set(batVoltage, 2));
    
    lastBatteryLevel = batLevel;
  }
  return true;
}```

In Domoticz you can see the battery level in Setup->Devices.

If you would like to see on a chart, you have to send the battery level or voltage to the controller as a sensor value too. After it, you can see as this:

I'm searching same enclosures, but what I found are very ugly and expensive.

http://www.voelkner.de/products/294193/Steckergehaeuse-mit-Steckdose-Stg15.html
https://www.conrad.de/de/stecker-gehaeuse-53-x-67-x-110-abs-schwarz-strapubox-sg-422-1-st-522910.html
http://www.reichelt.de/Plug-Housings/2/index.html?&ACTION=2&LA=2&GROUPID=3357

The power comsumption is 30uA in sleep (not connected additional sensor just the MCP9700).

@Oleg-Greengo thank you! It's working!

I modified the code and it's working on DevDuino v2.2
https://codebender.cc/sketch:203114

@hek Thanks. I'm waiting for 1.6.

Ok, now it's working. I changed CE and CS in MyConfig.h. I thought I can redefine the values in the sketch file too.

@Dwalt I'm using v1.5 so I added CE, CS define lines below MySensors.h include line

Hi,

Are there anybody, who could use the RF on this board with mySensors?
http://www.seeedstudio.com/wiki/DevDuino_Sensor_Node_V2.2_(ATmega_328)

I ordered one from this board and yesterday received. Firstly I couldn't upload sketch, but I found out the RX and TX pin label swapped on the board. After it, I could upload a sketch from here:
https://codebender.cc/sketch:54782?referrer=gregl

But the CE and CS pins moved to 7 and 6 (I changed it in the sketch) . But after boot, I got radio fail error on serial port.

@ahmedadelhosni thank you for you explanation. I won't use it.

Hi,
3 weeks ago I ordered some $0.99 USB power supply from Aliexpress: http://www.aliexpress.com/item/Hot-5V-2A-Travel-Convenient-EU-Plug-Wall-USB-Charger-Adapter-For-Samsung-galaxy-S5-S4/32362543740.html

Today arrived. I opened and I think it is not bad, isn't it?

@n3ro ohh, it's great. Which PIR are you using?

@n3ro Yes, you can. The sleep function has a return value. If it is < 0, timer is timed out. Otherwise it waked up by interrupt.

I'm working on a same multi sensor PCB with batteries. The PIR consumes 150uA. So you can reduce consume if your search a low power PIR sensor. Like this: http://forum.mysensors.org/topic/2387/low-power-pir-breakout-board-for-mysensors-and-evaluation/6
@scalz said it consumes only ~24uA.