ESP8266 + pulse counting Wifi upload to Emoncms

[myozone (Dave)]

I’ve been thinking about a cheap method of uploading led pulses from my Kwh meter to Emoncms and thought it could be done with just a ESP8266 and a photo diode like the one you can get from the shop Optical Utility Meter LED Pulse Sensor - Shop | OpenEnergyMonitor Is there any code already written to do this for the ESP8266 ? I’ve come across Easyesp which might do it, but unsure it’ll work with Emoncms. This shows the it working with Domoticz Utility room reading with the ESP8266 and Domoticz - YouTube

Thanks,

Dave.

[glyn.hudson]

It should be possible since ESP8266 has got an interrupt input, see this thread and link:

Wemos D1 Mini (ESP8266) pulse counting

Hi, I have an problem to use TSL257 Light-to-Voltage optical converter. I have tried to achieve pulse counting on Wemos D1 Mini (ESP8266). 10k resistor is connected between signal and ground (inside of sock in the picture) and I also printed ambient light cover for sensor, but no help. Even tought I held my thump over the sensor (and this way secure that there is no any light leak) sensor is stating at same state. I have used code from here: Learn | OpenEnergyMonitor and I am getting readin…

ESP8266 Interrupt Driven Meter Monitor

It sounds like every ESP8266 pin can be used in interrupt mode:

Pin interrupts are supported through attachInterrupt, detachInterrupt functions. Interrupts may be attached to any GPIO pin, except GPIO16. Standard Arduino interrupt types are supported: CHANGE, RISING, FALLING.

from: http://esp8266.github.io/Arduino/versions/2.1.0-rc2/doc/reference.html#digital-io

[JoniR (Joni Räsänen)]

Hi,
I can verify this. I have been used this to measuring my electricity consumption since I got working TSL257 sensor. You can find example code from other thread linked by Glyn. Although I am not using Emoncms after all so I cannot comment to that.