Sensebender with LED pulse count from openenergymonitor.org

[alexsh1]

Thanks.
The pulse sensor has got a separate green LED to indicate when a pulse is received - it is not blinking in my case. PrintIn does not show much unfortunately though the sensor is powered up with 3.3V. I need to figure out the pull-up/down resistor value.

[Sparkman]

@alexsh1 Not sure if you need an extra resistor. I would expect there is some internal circuitry in the sensor already. Have you looked at the schematics of the emonPi, etc. on the OpenEnergyMonitor website to see if they have any additional components on their input for the sensor? I would expect the led to flash if you have Vcc and Gnd connected so perhaps something else is wrong. Are you powering with 3.3v or 5v?

Cheers
Al

[alexsh1]

@Sparkman Yes, I did look at the openenergymonitor wiki - does not say much.
http://openenergymonitor.org/emon/buildingblocks/opticalpulsesensor

However, managed to find on the their web-site the following:

LED Pulse counting

No pull down resistor is required as the pulse / light sensor output is logic level 0 when the pulse is low. However, if you build a pulse counting module with pull down resistors of ~10k it still works with the light sensor, more info to come on this.

As this is sensebender (powered by two AA batteries), voltage is around 3.1V currently. Are you thinking this is an issue? Will check all the connections to make sure I do not have a bad connection or something.

[Sparkman]

@alexsh1 The 3.1v might be a problem. I would power from 3.3v and see if the green led starts blinking. Doesn't sound like you need any pullup/down resistors.

Cheers
Al

[alexsh1]

@Sparkman Tried 3.3V and still does not work

[alexsh1]

@Sparkman I narrowed down the problem. The sketch and the sensor do not work with the sensebender. I used Arduino Nano instead and it worked though the gateway stopped receiving the signal after 10-20 mins, but that is a different problem. Now I think there is an issue with interruption with the sensebender.

Did anyone compiled energy pulse sensor on the sensebender please?

[Sparkman]

@alexsh1 Good to hear you are making progress. With the nano, was it powered by 3.3v or 5v? From what I understand, the interrupt pins on the Nano and SenseBender should work the same, but maybe @tbowmo can confirm.

Cheers
Al

[alexsh1]

it was powered with 5V, but works fine with 3V.
I have to figure out if the interrupt pins are the same as nano

I have it fully up and running under the nano

[alexsh1]

The interrupt pins are the same as Nano - I have to understand what was wrong in the first place.

[tbowmo]

@Sparkman

You are right. The pin names on the sensebender, corresponds to the pin names on the arduinos, so the interrupt on D3 is the same as on the arduino.