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).

Keystudio PIR 15uA working.

Terrence 2 Jun 2017, 14:53 last edited by

BoRRoZ over on TheThingsNetwork (LoRaWAN network) posted this PIR.

Working Current: 15uA

http://www.keyestudio.com/keyestudio-pir-motion-sensor-for-arduino.html

https://www.thethingsnetwork.org/forum/t/the-bargain-basement-part-2/5977/4

I to am in search of the Holy Grail (long lasting coin cell powered RFM69 PIR node). I am a software guy so I can't contribute much here but links.
Reply Quote 0
1 Reply Last reply
Loading More Posts
3
Posts

1.0k
Views
Reply

Reply as topic
Log in to reply
Nca78 Hardware Contributor 2 Jun 2017, 19:31 last edited by

Looks à lot like AM/AS 312 beeing discussed in this forum at the moment
Reply Quote 0
1 Reply Last reply 2 Jun 2017, 19:32
Terrence 2 Jun 2017, 19:32 last edited by @Nca78

@Nca78 Yes, I have been following along, that is why I posted the link. Maybe this one is comparable or hopefully better?
Reply Quote 0
1 Reply Last reply

3
Posts

1.0k
Views

Log in to reply

1 out of 3

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.
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.
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; }
hlk-pm01 are to noisy for rfm69?
Hardware • 5 Aug 2023, 21:16 • Tmaster 9 Aug 2023, 16:28

5

0
Votes

5
Posts

27
Views

9 Aug 2023, 16:28

@Tmaster Never assume the original PCB was just a circuit of components, the PCB can incorporate RF shields and antenna radio ground planes...
"Remote Irrigation with LoRaWAN: LM27313 Challenges and PCB Design"
Hardware • 24 Jan 2024, 23:06 • wrendral 3 Feb 2024, 07:13

10

0
Votes

10
Posts

42
Views

3 Feb 2024, 07:13

@wrendral said in "Remote Irrigation with LoRaWAN: LM27313 Challenges and PCB Design": I will go with a Li-Po Battery type: 304048 3.7V 1200mAh Might work, but maybe the internal protection will trigger with the high current peaks. I'd suggest you plan a 0 Ohm, (2512/THT) resistor as R2 and then replace it with a 100Ohm/1Watt if the protection triggers.
Best VOC sensor for detecting a wide range of VOC's?
Hardware • 26 Oct 2023, 23:59 • NeverDie 18 Nov 2023, 01:41

3

1
Votes

3
Posts

36
Views

18 Nov 2023, 01:41

@eiten I haven't yet made any progress on finding a good VOC sensor, but along the way I did find out something interesting regarding CO2: namely, if you sleep with your bedroom door closed at night, then the odds are good that the CO2 levels rise to surprisingly high and unhealthy levels. The better CO2 sensors are factory calibrated and never again need recalibration for the life of the sensor (usually around 10 years or so), because they are used in HVAC systems to control fresh air intake to guarantee indoor air quality. As a for instance, here is one such CO2 sensor: https://www.digikey.com/en/products/detail/senseair/006-0-0008/15790694 At around $50 for just the sensor element itself, it's not exactly cheap, but then again, I'd say it's worth it, because who wants to be burdened by remembering to calibrate their CO2 sensors? Ideally, I'd like to find a sensitive VOC sensor that also will never require calibration. Nearly all, and maybe all, of the off-the-shelf IAQ montoring stuff that you might buy for, say, $300 or less seems to require periodic calibration. For that reason, this might be one of those occasions where build is rather than buy.

6
Online

11.5k
Users

11.1k
Topics

112.8k
Posts

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

1 / 1