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).

Debugging a sensor with external power supply

Moshe Livne Hero Member last edited by

I have a sensor that is being fed ~8v throught a rectifier from 9v ac. something is not right - I can't see the sensor in domoticz and the leds flash are not the same as regular usb. however, when I connect the 5v usb cable to the computer to see the log, it seems that everything is awesome.... is there a way of still getting the messages without the power?
Reply Quote 0
1 Reply Last reply

1
Posts

707
Views

Suggested Topics

Over the air updates
General Discussion • • ToSa

87

1
Votes

87
Posts

50408
Views

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 VOC sensor for detecting a wide range of VOC's?
Hardware • • NeverDie

3

1
Votes

3
Posts

29
Views

@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.
hlk-pm01 are to noisy for rfm69?
Hardware • • Tmaster

5

0
Votes

5
Posts

27
Views

@Tmaster Never assume the original PCB was just a circuit of components, the PCB can incorporate RF shields and antenna radio ground planes...
Sleep mode for bmp280
Hardware • • fishermans

7

4
Votes

7
Posts

3279
Views

Just wanted to say thanks for this, it is still relevant and useful six years later !
New user has questions
Hardware • • Doggie

7

0
Votes

7
Posts

50
Views

I am new in this forum and I have a question regarding mysensors and iobroker. I did not work with mysensors up to now. Since some weeks I use iobroker installed on a raspberrypi. Now I want to integrate my 433 Mhz doorbell in iobroker. I know, that there is an adapter for mysensors in iobroker. My question is: Is it possible to get a notification in iobroker if someone is pressing the button on my doorbell? As I understood, I have to connect the receiver to an arduino nano and connect the arduino to my rasberrypi on which iobroker is running.
Sensors and more
Hardware • • Robert Leverett

1

0
Votes

1
Posts

15
Views

No one has replied

Debugging a sensor with external power supply

Suggested Topics

Over the air updates
General Discussion • • ToSa

Best VOC sensor for detecting a wide range of VOC's?
Hardware • • NeverDie

hlk-pm01 are to noisy for rfm69?
Hardware • • Tmaster

Sleep mode for bmp280
Hardware • • fishermans

New user has questions
Hardware • • Doggie

Sensors and more
Hardware • • Robert Leverett

15
Online

11.2k
Users

11.1k
Topics

112.5k
Posts

Debugging a sensor with external power supply

Suggested Topics

Over the air updates General Discussion • • ToSa

Best VOC sensor for detecting a wide range of VOC's? Hardware • • NeverDie

hlk-pm01 are to noisy for rfm69? Hardware • • Tmaster

Sleep mode for bmp280 Hardware • • fishermans

New user has questions Hardware • • Doggie

Sensors and more Hardware • • Robert Leverett

15Online

11.2kUsers

11.1kTopics

112.5kPosts

Over the air updates
General Discussion • • ToSa

Best VOC sensor for detecting a wide range of VOC's?
Hardware • • NeverDie

hlk-pm01 are to noisy for rfm69?
Hardware • • Tmaster

Sleep mode for bmp280
Hardware • • fishermans

New user has questions
Hardware • • Doggie

Sensors and more
Hardware • • Robert Leverett

15
Online

11.2k
Users

11.1k
Topics

112.5k
Posts