MicroPython Forum (Archive)

def irqHandler(pin):
micropython.schedule(sch, None)

You are calling sch before it is defined!

Thank you for your input Peter. I have discovered that my cheap photo sensor is not the best solution for detecting pulses and I am currently waiting for delivery of a BPW34 Photodiode to try and correct this.

Danke Roberthh!

That's certainly how I would do it. Have a trivial interrupt handler which increments a global. The main code runs a loop which: Clears down the global. Pauses for (say) one minute. Reads the value of the global. Calculates the power and publishes the result. There are possible improvements to acco...

jimmo wrote: ↑

Fri Aug 23, 2019 12:05 am

Also, another thought. At the moment your detection code is tied up with the publishing code, so a delay in one will affect the other.

Yes jimmo, that bit needs some work too. Thanks for the input.

This is on an ESP8266. That would explain the observed behaviour completely, a double trigger would halve the time. Is there a way to overcome this, A Schmitt trigger?

Thinking about it further, garbage collection would slow down the process which would result in a lower rather than a higher reading!

I have put together some code to read the pulses from an electricity meter. I have been testing it using a flashing LED. Mostly the results are constant, as they should be but occasionally I get two readings in series that are double what they should be. Could Garbage collection be the problem? from...

Have you considered sending the data using MQTT in real time?
I am doing something similar with temperature readings, using Node-Red to receive the MQTT messages and pass them to an InfluxDB database for analysis with Grafana.
I was pleasantly surprised how easy it is to set up MQTT on MicroPython.

Thank you for the quick reply anyway. I am a Linux user and am spoiled by the long history. Also I am lazy
I've just started with Micropython and am having the time of my life!
I also saw that you are from a country I lived in for 33 years, so shoene Gruesse aus Wales.