Hi
Is this possible to have all these in same emontx; 3-phase measuring, pulse input from energy meter and temperature measuring?
Or pulse input(one or two) and temperature measuring?
I found these:
Upload the configuration specific firmware:
- Current only - this is the simplest electricity monitoring configuration and is comparable to most domestic home electricity monitors.
- Current and Voltage - This is the recommended electricity monitoring configuration as the additional voltage measurement gives you greater accuracy. It calculates real power and power factor.
- Electricity and temperature - Voltage and current based electricity measurement and 4x temperature sensors ideal for heatpump monitoring or solar hot water system monitoring.
- Pulse counting only: Water, gas, electric
- Elster meter interface only
Re: 3-phase monitoring, pulse input and temperature
I assume all is possible if coding is not a problem.
Re: 3-phase monitoring, pulse input and temperature
3-phase measuring of current will require three CT's. Do you want to measure voltage as well? If so, is that for all 3 phases, or just one? AnalogRead statements take a lot of processing time, and you need thousands of them per second per channel for good results. Some time can be saved by controlling the ADC directly.
Pulses from energy meters can be detected very easily because they can use digital inputs and do not need to be checked very often. Or maybe you could use an interrupt? I'm not sure about your temperature sensor, but it would presumably not need to be measured very often.
As you say, everything should be possible within the code. But your measurements for current/voltage do need be done often enough for the results to be useful.