Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).

Power meter

siklosi 12 Jul 2016, 08:54 last edited by

Hi,
I just saw article on HackaDay about guy reverse engineering cheap power meter.

http://hackaday.com/2016/07/11/put-a-reverse-engineered-power-meter-in-your-toolkit/

http://webx.dk/oz2cpu/energy-meter/energy-meter.htm

Here is the power meter on aliexpress

http://www.aliexpress.com/item/LCD-4IN1-display-Voltage-current-active-power-energy-meter-blue-backlight-panel-voltmeter-ammeter-kwh-0/32611189341.html

It looks interesting and adding MySensors to it would be great.
Reply Quote 1
1 Reply Last reply
Loading More Posts
2
Posts

1.3k
Views
Reply

Reply as topic
Log in to reply
topic:timeago_later,2 months

flopp 4 Sept 2016, 13:09 last edited by

That display will measure the load that you connect to it but maybe you can hack it and send information to the display instead?
Reply Quote 0
1 Reply Last reply

2
Posts

1.3k
Views

Log in to reply

2 out of 2

Suggested Topics

Over the air updates
General Discussion • 23 Mar 2014, 21:38 • ToSa 1 Mar 2015, 11:21

87

1
Votes

87
Posts

50.4k
Views

1 Mar 2015, 11:21

I would really like to get OTA working here as it's freezing outside and I have to go there to update the software in the greenhouse control system. So please, can we have a 'how to' step-by-step guide to OTA? Please? S.
Does MySensors require Arduino Timer 2?
Hardware • mysensors interrupt nano interrupts esp • 6 Jan 2024, 19:39 • OldSurferDude 11 Jan 2024, 04:39

2

0
Votes

2
Posts

22
Views

11 Jan 2024, 04:39

I have success! (oops, that's suppose to be Timer1) I only sample for 1/60 of a second. What I did was to back up all the timer registered I used and then resorted them after I was done sampling. (As opposed to initializing the registers in setup and then starting the timer when needed.) Now I have a Nano sampling the data and sending it to a MySensors Gateway on an RPi3B+ which then sends it to an MQTT broker runing on an old laptop. Also running on the laptop is Home Assistant running inside of VirtualBox. If MySensors does use Timer1, it appears that restoring the registers allows it to be shared. //------------------------------------------------------ISR ISR(TIMER1_OVF_vect){ // interrupt service routine for overflow TCNT1 = TimerPreloadValue; // must be first line! starts the timer counting again digitalWrite(TRIGGER_START_SAMPLE_PIN,HIGH); samplesVolts[--sample]=analogRead(VOLTS_IN_PIN); // decrement before capturing samplesCurrent[sample]=analogRead(CURRENT_IN_PIN); digitalWrite(TRIGGER_START_SAMPLE_PIN,LOW); if (!sample){ // count down to zero digitalWrite(TRIGGER_START_SAMPLE_PERIOD_PIN,LOW); // indicate that sampling is complete samplingEnd = micros(); TCCR1B &= 248; // turns off timer } } //------------------------------------------------------sampleOneCycle void sampleOneCycle(){ // back up timer registers uint8_t TCNT1_b = TCNT1; uint8_t TCCR1B_b = TCCR1B; uint8_t TCCR1A_b = TCCR1A; uint8_t TIMSK1_b = TIMSK1; // configure timer which starts the sampling noInterrupts(); // disable all interrupts TCCR1A = 0; TCCR1B = 0; TCNT1 = TimerPreloadValue; // preload timer //TCCR1B |= (1 << CS10)|(1 << CS12); // 1024 prescaler TCCR1B &= 248; // turns off timer? TIMSK1 |= (1 << TOIE1); // enable timer overflow interrupt ISR // demark sampling sample = NUMBER_OF_SAMPLES; // count down to zero digitalWrite(TRIGGER_START_SAMPLE_PERIOD_PIN,HIGH); samplingStart = micros(); TCNT1 = 65535; // first trigger right away! TCCR1B |= 1; // turns on timer interrupts(); // enable all interrupts // wait for sampling to be complete while(digitalRead(TRIGGER_START_SAMPLE_PERIOD_PIN)){}; samplingEnd = micros(); // restore timer registers TCNT1 = TCNT1_b; TCCR1B = TCCR1B_b; TCCR1A = TCCR1A_b; TIMSK1 = TIMSK1_b; }
Sensors and more
Hardware • 19 Jun 2023, 00:41 • Robert Leverett 19 Jun 2023, 00:41

1

0
Votes

1
Posts

16
Views

No one has replied
Best time of year to buy higher quality small project solar panels?
Hardware • 10 Jun 2021, 19:19 • NeverDie 30 Aug 2024, 14:01

5

1
Votes

5
Posts

71
Views

30 Aug 2024, 14:01

It probably has to do with fewer people buying them once summer ends, so companies might lower prices to clear out stock before winter.
Arduino Nano Every problem
Hardware • 1 Feb 2020, 09:18 • hakha4 5 Dec 2023, 02:21

6

1
Votes

6
Posts

84
Views

5 Dec 2023, 02:21

I bought the Every because it implied it was backward compatible with the nano. No, it's not, as we found out. Be that as it may, any word on a getting the Every working with mySensors?
Sensor to detect marijuana vape/smoke
Hardware • 21 Jan 2025, 06:36 • Hellmark 25 Feb 2025, 20:56

4

0
Votes

4
Posts

28
Views

25 Feb 2025, 20:56

There are air quality monitors that can detect VOCs (volatile organic compounds), and some that claim to pick up marijuana smoke specifically. Devices like the Airthings Wave Plus, uHoo Air Sensor, or Plume Labs Flow could help identify changes in air quality. Another option is checking with industrial-grade smoke detection companies that provide sensors for businesses and schools, and some of them may also have solutions suited for home use. If you want more information on vape-related products, including how they work and their components, check out Geek Bar Pulse X Platinum Edition. Understanding vape devices can help recognize patterns of use or detect scents earlier.

0
Online

11.5k
Users

11.1k
Topics

112.8k
Posts

Copyright 2019 TBD | Forum Guidelines | Privacy Policy | Terms of Service

1 / 1